From ychen at BGC-JENA.MPG.DE  Mon Nov  2 09:41:13 2009
From: ychen at BGC-JENA.MPG.DE (Youmin Chen)
Date: Mon, 2 Nov 2009 15:41:13 +0100
Subject: unsubscribe
In-Reply-To: <9F6B45159B88D2428A8B96142B95002F0555E6A3@EMAIL01.pnl.gov>
Message-ID: <MON.2.NOV.2009.154113.0100.>

Please remove my e-mail from the list. Thanks!


From owenfan0715 at SINA.COM.CN  Mon Nov  2 10:12:46 2009
From: owenfan0715 at SINA.COM.CN (=?ISO-8859-1?B?bGl6aGkubWlhbw==?=)
Date: Mon, 2 Nov 2009 23:12:46 +0800
Subject: Which version of GrADS can be used in GDS to support NetCDF-4/HDF5
Message-ID: <MON.2.NOV.2009.231246.0800.>

Hi all,

I tried to use one version of GrADS in GDS to support NetCDF-4. And, I tested many versions of GrADS, but failed. Is there any one using GDS to public NetCDF-4? Which version of GrADS was used in GDS? Any suggestion will be appreciated. Thanks.


Best Regards,

Tim
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From jma at COLA.IGES.ORG  Mon Nov  2 13:45:15 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Mon, 2 Nov 2009 13:45:15 -0500
Subject: Which version of GrADS can be used in GDS to support
 NetCDF-4/HDF5
In-Reply-To: <tencent_79A968090C34218F748CDC99@qq.com>
Message-ID: <MON.2.NOV.2009.134515.0500.>

I have not released a version of GrADS that will read netcdf-4. I am
in the process of testing netcdf-4 with GrADS -- the OPeNDAP interface
doesn't yet work with sdfopen, and there are are some significant
performance issues when reading compressed NetCDF files that have yet
to be resolved. For netcdf-3, or for uncompressed netcdf-4, the
performance is fine.If you need to serve netcdf-4 with GDS, you can
try Arlindo's opengrads builds.
--Jennifer

On Nov 2, 2009, at 10:12 AM, lizhi.miao wrote:

> Hi all,
>
> I tried to use one version of GrADS in GDS to support NetCDF-4. And,
> I tested many versions of GrADS, but failed. Is there any one using
> GDS to public NetCDF-4? Which version of GrADS was used in GDS? Any
> suggestion will be appreciated. Thanks.
>
>
> Best Regards,
>
> Tim

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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From owenfan0715 at SINA.COM.CN  Mon Nov  2 14:31:00 2009
From: owenfan0715 at SINA.COM.CN (=?ISO-8859-1?B?bGl6aGkubWlhbw==?=)
Date: Tue, 3 Nov 2009 03:31:00 +0800
Subject: Which version of GrADS can be used in GDS to support
 NetCDF-4/HDF5
Message-ID: <TUE.3.NOV.2009.033100.0800.>

Hi Jennifer,

Thanks for your reply. Which verison of Arlindo's opengrads can support netcdf-4? and, where can I get it? Thanks again.

Best Regards,

Tim
  
 
------------------ Original ------------------
From:  "Jennifer Adams"<jma at COLA.IGES.ORG>;
Date:  Tue, Nov 3, 2009 02:45 AM
To:  "GRADSUSR"<GRADSUSR at LIST.CINECA.IT>; 

Subject:       Re: Which version of GrADS can be used in GDS to support             NetCDF-4/HDF5

 
 I have not released a version of GrADS that will read netcdf-4. I am in the process of testing netcdf-4 with GrADS -- the OPeNDAP interface doesn't yet work with sdfopen, and there are are some significant performance issues when reading compressed NetCDF files that have yet to be resolved. For netcdf-3, or for uncompressed netcdf-4, the performance is fine.If you need to serve netcdf-4 with GDS, you can try Arlindo's opengrads builds.--Jennifer

On Nov 2, 2009, at 10:12 AM, lizhi.miao wrote:

Hi all,

I tried to use one version of GrADS in GDS to support NetCDF-4. And, I tested many versions of GrADS, but failed. Is there any one using GDS to public NetCDF-4? Which version of GrADS was used in GDS? Any suggestion will be appreciated. Thanks.


Best Regards,

Tim


 --
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org
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From arlindo.dasilva at GMAIL.COM  Mon Nov  2 14:44:09 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Mon, 2 Nov 2009 14:44:09 -0500
Subject: Which version of GrADS can be used in GDS to support
 NetCDF-4/HDF5
In-Reply-To: <0FB4302D-E8C0-41E4-AE95-772E3BD5FFBD@cola.iges.org>
Message-ID: <MON.2.NOV.2009.144409.0500.>

On Mon, Nov 2, 2009 at 1:45 PM, Jennifer Adams <jma at cola.iges.org> wrote:

> I have not released a version of GrADS that will read netcdf-4. I am in the
> process of testing netcdf-4 with GrADS -- the OPeNDAP interface doesn't yet
> work with sdfopen, and there are are some significant performance issues
> when reading compressed NetCDF files that have yet to be resolved. For
> netcdf-3, or for uncompressed netcdf-4, the performance is fine.If you need
> to serve netcdf-4 with GDS, you can try Arlindo's opengrads builds.
>

We have been serving NetCDF-4 data for some time now with the OpenGrADS
builds, see for example:

         http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim

If you are using GDS-2 you want to download the OpenGrADS Bundle
v2.0.a7.oga.3:


http://sourceforge.net/projects/opengrads/files/grads2/2.0.a7.oga.3/

If you are using GDS-1 you want to download v1.10.r2.oga:


http://sourceforge.net/projects/opengrads/files/grads1/1.10.r2/

Both versions support NetCDF-4.

A word of caution regarding NetCDF-4 compression. Make sure you specify the
chuncking size, say, to be a 2D slice of data. Depending on the NetCDF-4
version, the default chunking size may lead to very poor performance during
reading. The recently released LATS extension chooses the chunking size this
way.

      Arlindo




--
Arlindo da Silva
dasilva at alum.mit.edu
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From h.meteo.shirazu at GMAIL.COM  Mon Nov  2 15:45:47 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Mon, 2 Nov 2009 14:45:47 -0600
Subject: open 2 file in grads
Message-ID: <MON.2.NOV.2009.144547.0600.>

hi all user
after open tow file in grads I can not display the variables of file2
error:

 ga-> d v2m
Syntax Error:  Invalid Operand
  'v2m' not a variable or function name
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = v2m
can anyone help me?
thanks .
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From teddyallen at YAHOO.COM  Mon Nov  2 15:58:48 2009
From: teddyallen at YAHOO.COM (Teddy Allen)
Date: Mon, 2 Nov 2009 12:58:48 -0800
Subject: open 2 file in grads
In-Reply-To: <5c658ce10911021245y646805b5h74f54f167e80874d@mail.gmail.com>
Message-ID: <MON.2.NOV.2009.125848.0800.>

Dear Hossein,
GrADS can?dislay multiple files at once, but each file after the first must be stated in this fashion:
d file1
d file2.2
d file3.3?
and so on....
Just be sure that the display command for the second file has a .2 after it and the third file has a .3 after it etc....?


http://www.teddyallen.com
"To move quickly, go alone. To move far, go together." 
African Proverb




________________________________
From: hossein lotfi <h.meteo.shirazu at GMAIL.COM>
To: GRADSUSR at LIST.CINECA.IT
Sent: Mon, November 2, 2009 3:45:47 PM
Subject: open 2 file in grads


hi all user 
after open tow file in grads?I can not display the variables of file2
error:

?ga-> d v2m
Syntax Error:? Invalid Operand
? 'v2m' not a variable or function name
? Error ocurred at column 1
DISPLAY error:? Invalid expression
? Expression = v2m
can anyone help me?
thanks .


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com
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From h.meteo.shirazu at GMAIL.COM  Mon Nov  2 16:14:56 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Mon, 2 Nov 2009 15:14:56 -0600
Subject: file 2
Message-ID: <MON.2.NOV.2009.151456.0600.>

Hi all user
I can not open the variable of file2 in grads (when I open tow files)
this command can not works:
d v2m.2
d file 2.2
...
 can you help me?
thanks.
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From Wesley.Ebisuzaki at NOAA.GOV  Mon Nov  2 17:05:01 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Mon, 2 Nov 2009 17:05:01 -0500
Subject: Manage lat-lon thinned grid
In-Reply-To: <2DE59EDD7E9F46599A91135E469DD96A@trsspa.it>
Message-ID: <MON.2.NOV.2009.170501.0500.>

Diego,

File #1: I was able to plot the thinned grid using grads 2a05.
File #2: This file is hopeless. It is using complex packing of a grid
which is legal grib1 but
never used (AFAIK) until people started converting to grib2.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> * Problems *
>
> * *
>
> 1) I need to read with grads also the grib files with lat-long
> ?thinned? grids, I just know, by documentation, that my version
> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
> attachment an example of this kind of file s (LFPW?.)
>
> 2) I have some files that are managed by grads without error (version
> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
> in the attachment an example of this kind of file s (YMID?.)
>
> * My questions *
>
> How can I view, on a picture, information contained in files like
> those in the attachment?
>
> Is there any version of GrADS that manage them?
>
> Is there some work-around that I can follow to satisfy my need?
>
> If no, do you know any other software that I can be used?
>
> We are willing to pay for any new SW developments or your advice. Can
> you help us?
>
> Best regards,
>
> Diego
>
> -------------------------------------
>
> Diego Morelli
>
> T.R.S. S.p.A.
>
> Via della Bufalotta, 378 - 00139 Roma
>
> Tel. 06.87281.301
>
> Fax 06.87281.550
>
> diego.morelli at trs.it
>


From james.aaron.reynolds at US.ARMY.MIL  Mon Nov  2 17:50:46 2009
From: james.aaron.reynolds at US.ARMY.MIL (James Aaron Reynolds)
Date: Mon, 2 Nov 2009 23:50:46 +0100
Subject: Display Geopotential Height?
Message-ID: <MON.2.NOV.2009.235046.0100.>

I've built a meteogram, I want to display Geopotential Height on the right
hand side vertically of the Y-axis but not on the Meteogram image itself.
How might I do this?


From nieves at LTP.UPR.CLU.EDU  Mon Nov  2 21:23:04 2009
From: nieves at LTP.UPR.CLU.EDU (Jose F Nieves)
Date: Mon, 2 Nov 2009 22:23:04 -0400
Subject: freebsd bundles
Message-ID: <MON.2.NOV.2009.222304.0400.>

Hello

The bundles

        grads-2.0.a7.oga.3-bundle-i386-unknown-freebsd7.2.tar.gz
        grads-2.0.a7.oga.3-bundle-i386-unknown-freebsd7.2.tar.gz

are ready in the source forge repository.

Feel free to write if something does not work or, better,
if everything looks ok.

Jose


From eliavs at GMAIL.COM  Tue Nov  3 01:22:17 2009
From: eliavs at GMAIL.COM (eliav schmulewitz)
Date: Tue, 3 Nov 2009 08:22:17 +0200
Subject: file 2
In-Reply-To: <5c658ce10911021314tef24d9dj4aa1419edfccf7f4@mail.gmail.com>
Message-ID: <TUE.3.NOV.2009.082217.0200.>

did you try 'set dfile 2'?
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From naishi at METEO.MCGILL.CA  Mon Nov  2 21:50:39 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Mon, 2 Nov 2009 21:50:39 -0500
Subject: how to calculate the difference between the two latitudes
Message-ID: <MON.2.NOV.2009.215039.0500.>

Hi everyone,

I need to solve a problem: namely get the difference between the two
latitudes at which the mass stream function equals zero, between these two
zero values there is a maximum value usually. And the grid values about
the mass stream function phim (lat,pressure) are from a netCDF data file.
So how can I get the difference between these two latitudes with zero
stream function? Do I need to convert netCDF to the other .dat file by
using ncdump tool , and then use F90 to do the simple calculation to solve
my problem, or am I able to only use GrADS scripting language to do the
simple calculation? Or any other way to solve this?

I will appreciate any help !

Phillip


From naishi at METEO.MCGILL.CA  Mon Nov  2 21:53:53 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Mon, 2 Nov 2009 21:53:53 -0500
Subject: Display Geopotential Height?
In-Reply-To: <20091102225205.4BDA320446@mx2.cineca.it>
Message-ID: <MON.2.NOV.2009.215353.0500.>

Hi James,
COULD you send me all the script and .ctl and data file to me to have a
test, and then I try to fix that problem for you, okay?
I am looking forward to hearing from you again!
Phil


> I've built a meteogram, I want to display Geopotential Height on the right
> hand side vertically of the Y-axis but not on the Meteogram image itself.
> How might I do this?
>


From diego.morelli at TRS.IT  Tue Nov  3 04:48:03 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Tue, 3 Nov 2009 10:48:03 +0100
Subject: R: Manage lat-lon thinned grid
In-Reply-To: <4AEF578D.2080206@noaa.gov>
Message-ID: <TUE.3.NOV.2009.104803.0100.>

Hello Wesley.

I'm very glad to receive your help.

I just tried to use grads 2, convgrib and wgrib2 and the result is success
for the "file #1".

Ok for the file #2. Yours is a confirm that reinforce my opinion about its
handling.

Regards,

Diego


-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: luned? 2 novembre 2009 23.05
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: Manage lat-lon thinned grid

Diego,

File #1: I was able to plot the thinned grid using grads 2a05.
File #2: This file is hopeless. It is using complex packing of a grid
which is legal grib1 but
never used (AFAIK) until people started converting to grib2.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> * Problems *
>
> * *
>
> 1) I need to read with grads also the grib files with lat-long
> ?thinned? grids, I just know, by documentation, that my version
> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
> attachment an example of this kind of file s (LFPW
.)
>
> 2) I have some files that are managed by grads without error (version
> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
> in the attachment an example of this kind of file s (YMID
.)
>
> * My questions *
>
> How can I view, on a picture, information contained in files like
> those in the attachment?
>
> Is there any version of GrADS that manage them?
>
> Is there some work-around that I can follow to satisfy my need?
>
> If no, do you know any other software that I can be used?
>
> We are willing to pay for any new SW developments or your advice. Can
> you help us?
>
> Best regards,
>
> Diego
>
> -------------------------------------
>
> Diego Morelli
>
> T.R.S. S.p.A.
>
> Via della Bufalotta, 378 - 00139 Roma
>
> Tel. 06.87281.301
>
> Fax 06.87281.550
>
> diego.morelli at trs.it
>


From davide.sacchetti at ARPAL.ORG  Tue Nov  3 07:59:31 2009
From: davide.sacchetti at ARPAL.ORG (Davide Sacchetti)
Date: Tue, 3 Nov 2009 13:59:31 +0100
Subject: how to calculate the difference between the two latitudes
In-Reply-To: <51404.209.90.130.128.1257216639.squirrel@www.meteo.mcgill.ca>
Message-ID: <TUE.3.NOV.2009.135931.0100.>

the best solution would be to create a function (in a different
language) doing this, anyway:

suppose your variable is named "stream" and suppose you are interested
to a latitude interval of 40N - 60N
if you want to see latitude where stream is positive:
  d maskout(lat,stream)
if you want to see at which inferior latitude stream becomes positive:
  d min(maskout(lat,stream),lat=40,lat=60))
if you want to have the la difference (sup-inf) where stream = 0:
  display
max(maskout(lat,stream),lat=40,lat=60))-min(maskout(lat,stream),lat=40,lat=60))

Hoping it could help ...
bye bye
Davide



On Mon, 2009-11-02 at 21:50 -0500, Phillip Lin wrote:
> Hi everyone,
>
> I need to solve a problem: namely get the difference between the two
> latitudes at which the mass stream function equals zero, between these two
> zero values there is a maximum value usually. And the grid values about
> the mass stream function phim (lat,pressure) are from a netCDF data file.
> So how can I get the difference between these two latitudes with zero
> stream function? Do I need to convert netCDF to the other .dat file by
> using ncdump tool , and then use F90 to do the simple calculation to solve
> my problem, or am I able to only use GrADS scripting language to do the
> simple calculation? Or any other way to solve this?
>
> I will appreciate any help !
>
> Phillip
>
--
Sacchetti Davide
Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
ARPAL Unit?  Tecnica Complessa di livello Regionale
V.le Brigare Partigiane 2 16121 Genova (I)
tel: +39 010 6437535                    fax: +39 010 6437520
mail: davide.sacchetti at arpal.org     web: www.meteoliguria.it


From nathan at NATHANCOOL.COM  Tue Nov  3 11:15:02 2009
From: nathan at NATHANCOOL.COM (Nathan Cool)
Date: Tue, 3 Nov 2009 08:15:02 -0800
Subject: Vector arrows for primary wave direction
Message-ID: <TUE.3.NOV.2009.081502.0800.>

Good morning everyone,

I'm generating wave analysis models, but I'm having a tough time showing the
mean-wave (or primary) wave direction arrows.

The vars in the Grib are:
-------------------------------------------------
DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
UGRDsfc  0 33,1,1  ** surface u wind [m/s]
VGRDsfc  0 34,1,1  ** surface v wind [m/s]
WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]

For displaying wind vector arrows it's straightforward as there are U and V
variables (UGRDsfc and VGRDsfc) for the zonal and meridional components.
Displaying primary wave direction though seems more elusive, yet I see it
done on many models such as the following:
https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif

...which was generated using GrADS by FNMOC.

Any help you can provide would be greatly appreciated, and thank you for
your time.

--
Nathan Cool
nathan at nathancool.com
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From Wesley.Ebisuzaki at NOAA.GOV  Tue Nov  3 11:37:12 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Tue, 3 Nov 2009 11:37:12 -0500
Subject: R: Manage lat-lon thinned grid
In-Reply-To: <70C42370512B4056A732BF4492B86B3F@trsspa.it>
Message-ID: <TUE.3.NOV.2009.113712.0500.>

Diego,

For file #1, I was able to plot it in the original grib1 format. No need
to convert it into grib2.

Wesley

Diego Morelli wrote:
> Hello Wesley.
>
> I'm very glad to receive your help.
>
> I just tried to use grads 2, convgrib and wgrib2 and the result is success
> for the "file #1".
>
> Ok for the file #2. Yours is a confirm that reinforce my opinion about its
> handling.
>
> Regards,
>
> Diego
>
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: luned? 2 novembre 2009 23.05
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Manage lat-lon thinned grid
>
> Diego,
>
> File #1: I was able to plot the thinned grid using grads 2a05.
> File #2: This file is hopeless. It is using complex packing of a grid
> which is legal grib1 but
> never used (AFAIK) until people started converting to grib2.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
>
>> * Problems *
>>
>> * *
>>
>> 1) I need to read with grads also the grib files with lat-long
>> ?thinned? grids, I just know, by documentation, that my version
>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>> attachment an example of this kind of file s (LFPW?.)
>>
>> 2) I have some files that are managed by grads without error (version
>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>> in the attachment an example of this kind of file s (YMID?.)
>>
>> * My questions *
>>
>> How can I view, on a picture, information contained in files like
>> those in the attachment?
>>
>> Is there any version of GrADS that manage them?
>>
>> Is there some work-around that I can follow to satisfy my need?
>>
>> If no, do you know any other software that I can be used?
>>
>> We are willing to pay for any new SW developments or your advice. Can
>> you help us?
>>
>> Best regards,
>>
>> Diego
>>
>> -------------------------------------
>>
>> Diego Morelli
>>
>> T.R.S. S.p.A.
>>
>> Via della Bufalotta, 378 - 00139 Roma
>>
>> Tel. 06.87281.301
>>
>> Fax 06.87281.550
>>
>> diego.morelli at trs.it
>>
>>


From diego.morelli at TRS.IT  Tue Nov  3 13:21:16 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Tue, 3 Nov 2009 19:21:16 +0100
Subject: R: R: Manage lat-lon thinned grid
In-Reply-To: <4AF05C38.4050900@noaa.gov>
Message-ID: <TUE.3.NOV.2009.192116.0100.>

Really??
Did you use grib2ctl (then wgrib), gribmap (contained in the grads 2 packet)
and grads 2?

Here, under grads 2.0.a7, the command perl grib2ctl.pl <file1name>.b >
<file1name>.ctl, issue this error:

missing end section

37 37 30 30
***script needs to be modified
Unknown user-defined grid

Infact the ctl file miss the xdef, ydef information.

After, the command gribmap -I <file1name>.ctl -0, goes in segmentation
fault.

How did you do to manage this kind of file without the need to convert it in
grib2?? It will be very interesting for me...

Diego

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: marted? 3 novembre 2009 17.37
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: R: Manage lat-lon thinned grid

Diego,

For file #1, I was able to plot it in the original grib1 format. No need
to convert it into grib2.

Wesley

Diego Morelli wrote:
> Hello Wesley.
>
> I'm very glad to receive your help.
>
> I just tried to use grads 2, convgrib and wgrib2 and the result is success
> for the "file #1".
>
> Ok for the file #2. Yours is a confirm that reinforce my opinion about its
> handling.
>
> Regards,
>
> Diego
>
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: luned? 2 novembre 2009 23.05
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Manage lat-lon thinned grid
>
> Diego,
>
> File #1: I was able to plot the thinned grid using grads 2a05.
> File #2: This file is hopeless. It is using complex packing of a grid
> which is legal grib1 but
> never used (AFAIK) until people started converting to grib2.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
>
>> * Problems *
>>
>> * *
>>
>> 1) I need to read with grads also the grib files with lat-long
>> ?thinned? grids, I just know, by documentation, that my version
>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>> attachment an example of this kind of file s (LFPW
.)
>>
>> 2) I have some files that are managed by grads without error (version
>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>> in the attachment an example of this kind of file s (YMID
.)
>>
>> * My questions *
>>
>> How can I view, on a picture, information contained in files like
>> those in the attachment?
>>
>> Is there any version of GrADS that manage them?
>>
>> Is there some work-around that I can follow to satisfy my need?
>>
>> If no, do you know any other software that I can be used?
>>
>> We are willing to pay for any new SW developments or your advice. Can
>> you help us?
>>
>> Best regards,
>>
>> Diego
>>
>> -------------------------------------
>>
>> Diego Morelli
>>
>> T.R.S. S.p.A.
>>
>> Via della Bufalotta, 378 - 00139 Roma
>>
>> Tel. 06.87281.301
>>
>> Fax 06.87281.550
>>
>> diego.morelli at trs.it
>>
>>


From liuzf406 at 126.COM  Tue Nov  3 13:11:48 2009
From: liuzf406 at 126.COM (liuzf406)
Date: Wed, 4 Nov 2009 02:11:48 +0800
Subject: Ask for help
Message-ID: <WED.4.NOV.2009.021148.0800.>

Good afternoon everyone,

I need to calculate the moisture flux and the moisture divergence of 1992 summer over the continental United States. The gs file I wrote is as following, but I am not sure if it is right, so anyone can look at this file and give me some comments? In addition, attached are the calculated result using this file.
 
The gs file are:
-------------------------------------------------
'reinit'
'set grid off'
'set grads off'
'set poli on'
'set parea 1 10 1 8'
'sdfopen shum.mon.mean.nc'  
'sdfopen uwnd.mon.mean.nc' 
'sdfopen vwnd.mon.mean.nc'
'sdfopen pres.mon.mean.nc'
'enable print sum_1992.gmf'
'set lat 24.99 50.1'
'set xlint 10'
'set lon -130.01 -69.99'
'set ylint 10'
'set cint 20'
'set t 1 600'
'set font 0'
'set ccols 9 14 4 11 5 13 3 10 7 12 8 2 6'
'set mpdset cnworld mres'
'set map 1 1 1'
'draw map'
'set gxout shaded'
'set ylopts 1 4 0.18'
'set xlopts 1 4 0.18'
'set cthick 5'
'define m=shum.1*uwnd.2'
'define n=shum.1*vwnd.3'
'define qu=vint(pres.4(z=1),m,700)/1000'
'define qusum=ave(qu,t=534,t=536)'
'define qv=vint(pres.4(z=1),n,700)/1000'
'define qvsum=ave(qv,t=534,t=536)'
'set t 6'
'set gxout shaded'
'd qusum;qvsum'
'd hdivg(qusum,qvsum)'
'set gxout vector'
'set ccolor 1'
'run cbar'
'd qusum;qvsum'
*'set cint 20'
'draw string 1.9 7 Moisture transport'
'draw string 9.5 7 JJA-1992'
'print'
'disable print'
-------------------------------------------------


Any help you can provide would be greatly appreciated, and thank you for your time.







09???3D??????????????????
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From hhe at ATMOS.UMD.EDU  Tue Nov  3 14:55:55 2009
From: hhe at ATMOS.UMD.EDU (Hao He)
Date: Tue, 3 Nov 2009 14:55:55 -0500
Subject: missing data in .ctl file
Message-ID: <TUE.3.NOV.2009.145555.0500.>

Hi,
   I want to write a .ctl file to read HDF file, but I found in different
variables the definition if missing data is different. For example, I have
-9999 for Var A, and -999 for Var B. Can I put two value in undef like:

undef -9999
undef -999

Thanks!

Hao


From sushantpuranik at GMAIL.COM  Wed Nov  4 00:58:03 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Wed, 4 Nov 2009 11:28:03 +0530
Subject: Vector arrows for primary wave direction
In-Reply-To: <817a77c90911030815u14d4dae8lcbd3675f55489b8e@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.112803.0530.>

Hi
I am able to generate wind direction. try his
'set arrscl 1 30'
'set cthick 5'
'set arrowhead 0.10'
'set clevs 3 5 10 15 20 25'
'set ccols 0 4 1 2 3 5 12'
'set gxout vector'
'd
skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
'run cbar.gs'
'printim wind(m/s)'

with the help of such script i am able to generate output which is attached
with this mail.

all the best.

On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool <nathan at nathancool.com> wrote:

> Good morning everyone,
>
> I'm generating wave analysis models, but I'm having a tough time showing
> the mean-wave (or primary) wave direction arrows.
>
> The vars in the Grib are:
> -------------------------------------------------
> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>
> For displaying wind vector arrows it's straightforward as there are U and V
> variables (UGRDsfc and VGRDsfc) for the zonal and meridional components.
> Displaying primary wave direction though seems more elusive, yet I see it
> done on many models such as the following:
> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>
> ...which was generated using GrADS by FNMOC.
>
> Any help you can provide would be greatly appreciated, and thank you for
> your time.
>
> --
> Nathan Cool
> nathan at nathancool.com
>



--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From fdaryabor at GOOGLEMAIL.COM  Wed Nov  4 04:12:42 2009
From: fdaryabor at GOOGLEMAIL.COM (Farshid Daryabor)
Date: Wed, 4 Nov 2009 17:12:42 +0800
Subject: file 2
In-Reply-To: <5c658ce10911021314tef24d9dj4aa1419edfccf7f4@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.171242.0800.>

Dear
If you have 2 file, for display first file (var) you must use 'd var', for
second file (data) use 'd data 2'.
Best Regards
F.Daryabor

F.Daryabor
Center for Tropical and Climate Change  System
Faculty of Sciences and Technology
National University of Malaysia
BANGI 43600
Selangor, Malaysia

On Tue, Nov 3, 2009 at 5:14 AM, hossein lotfi <h.meteo.shirazu at gmail.com>wrote:

> Hi all user
> I can not open the variable of file2 in grads (when I open tow files)
> this command can not works:
> d v2m.2
> d file 2.2
> ...
>  can you help me?
> thanks.
>
>
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From diego.morelli at TRS.IT  Wed Nov  4 07:04:07 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Wed, 4 Nov 2009 13:04:07 +0100
Subject: R: R: Manage lat-lon thinned grid
In-Reply-To: <4AF05C38.4050900@noaa.gov>
Message-ID: <WED.4.NOV.2009.130407.0100.>

Hello Wesley.

I seen that the conversion from grib1 file to grib2 file and, after, the use
of g2ctl.pl (using wgrib2) command to create the descriptor file, give
different information about variable names, levels, format of variable rows,
and in certain cases an information loss.

Your last news opened me a new road, and a new hope.

I tried to copy the two rows about xdef and ydef of descriptor file created
with g2ctl.pl into the descriptor file created with grib2ctl.pl (using
wgrib). Then I built the idx file with the gribmap command without problem,
and grads 2 is able to plot the maps.

My next step is to find a more elegant/correct method to built the
descriptor file.
Can you explain me what procedure and commands did you follow?

Diego

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: marted? 3 novembre 2009 17.37
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: R: Manage lat-lon thinned grid

Diego,

For file #1, I was able to plot it in the original grib1 format. No need
to convert it into grib2.

Wesley

Diego Morelli wrote:
> Hello Wesley.
>
> I'm very glad to receive your help.
>
> I just tried to use grads 2, convgrib and wgrib2 and the result is success
> for the "file #1".
>
> Ok for the file #2. Yours is a confirm that reinforce my opinion about its
> handling.
>
> Regards,
>
> Diego
>
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: luned? 2 novembre 2009 23.05
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Manage lat-lon thinned grid
>
> Diego,
>
> File #1: I was able to plot the thinned grid using grads 2a05.
> File #2: This file is hopeless. It is using complex packing of a grid
> which is legal grib1 but
> never used (AFAIK) until people started converting to grib2.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
>
>> * Problems *
>>
>> * *
>>
>> 1) I need to read with grads also the grib files with lat-long
>> ?thinned? grids, I just know, by documentation, that my version
>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>> attachment an example of this kind of file s (LFPW
.)
>>
>> 2) I have some files that are managed by grads without error (version
>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>> in the attachment an example of this kind of file s (YMID
.)
>>
>> * My questions *
>>
>> How can I view, on a picture, information contained in files like
>> those in the attachment?
>>
>> Is there any version of GrADS that manage them?
>>
>> Is there some work-around that I can follow to satisfy my need?
>>
>> If no, do you know any other software that I can be used?
>>
>> We are willing to pay for any new SW developments or your advice. Can
>> you help us?
>>
>> Best regards,
>>
>> Diego
>>
>> -------------------------------------
>>
>> Diego Morelli
>>
>> T.R.S. S.p.A.
>>
>> Via della Bufalotta, 378 - 00139 Roma
>>
>> Tel. 06.87281.301
>>
>> Fax 06.87281.550
>>
>> diego.morelli at trs.it
>>
>>


From diego.morelli at TRS.IT  Wed Nov  4 08:34:23 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Wed, 4 Nov 2009 14:34:23 +0100
Subject: I: R: Manage lat-lon thinned grid
Message-ID: <WED.4.NOV.2009.143423.0100.>

If I repeat the procedure explained in my last mail, I found that I have the
same result also in grads ver 1.8SL-11.
Then, if you doesn't get me another news, I will finalize that the solution
is to use g2ctl in order to know the geographic area range and the grid
(i.e. xdef and ydef).

Diego

-----Messaggio originale-----
Da: Diego Morelli [mailto:diego.morelli at trs.it]
Inviato: mercoled? 4 novembre 2009 13.04
A: 'GRADSUSR at LIST.CINECA.IT'
Oggetto: R: R: Manage lat-lon thinned grid

Hello Wesley.

I seen that the conversion from grib1 file to grib2 file and, after, the use
of g2ctl.pl (using wgrib2) command to create the descriptor file, give
different information about variable names, levels, format of variable rows,
and in certain cases an information loss.

Your last news opened me a new road, and a new hope.

I tried to copy the two rows about xdef and ydef of descriptor file created
with g2ctl.pl into the descriptor file created with grib2ctl.pl (using
wgrib). Then I built the idx file with the gribmap command without problem,
and grads 2 is able to plot the maps.

My next step is to find a more elegant/correct method to built the
descriptor file.
Can you explain me what procedure and commands did you follow?

Diego

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: marted? 3 novembre 2009 17.37
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: R: Manage lat-lon thinned grid

Diego,

For file #1, I was able to plot it in the original grib1 format. No need
to convert it into grib2.

Wesley

Diego Morelli wrote:
> Hello Wesley.
>
> I'm very glad to receive your help.
>
> I just tried to use grads 2, convgrib and wgrib2 and the result is success
> for the "file #1".
>
> Ok for the file #2. Yours is a confirm that reinforce my opinion about its
> handling.
>
> Regards,
>
> Diego
>
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: luned? 2 novembre 2009 23.05
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Manage lat-lon thinned grid
>
> Diego,
>
> File #1: I was able to plot the thinned grid using grads 2a05.
> File #2: This file is hopeless. It is using complex packing of a grid
> which is legal grib1 but
> never used (AFAIK) until people started converting to grib2.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
>
>> * Problems *
>>
>> * *
>>
>> 1) I need to read with grads also the grib files with lat-long
>> ?thinned? grids, I just know, by documentation, that my version
>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>> attachment an example of this kind of file s (LFPW
.)
>>
>> 2) I have some files that are managed by grads without error (version
>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>> in the attachment an example of this kind of file s (YMID
.)
>>
>> * My questions *
>>
>> How can I view, on a picture, information contained in files like
>> those in the attachment?
>>
>> Is there any version of GrADS that manage them?
>>
>> Is there some work-around that I can follow to satisfy my need?
>>
>> If no, do you know any other software that I can be used?
>>
>> We are willing to pay for any new SW developments or your advice. Can
>> you help us?
>>
>> Best regards,
>>
>> Diego
>>
>> -------------------------------------
>>
>> Diego Morelli
>>
>> T.R.S. S.p.A.
>>
>> Via della Bufalotta, 378 - 00139 Roma
>>
>> Tel. 06.87281.301
>>
>> Fax 06.87281.550
>>
>> diego.morelli at trs.it
>>
>>


From sh.maeam at GMAIL.COM  Wed Nov  4 09:18:29 2009
From: sh.maeam at GMAIL.COM (sh zhou)
Date: Wed, 4 Nov 2009 22:18:29 +0800
Subject: missing values in wrf_output
Message-ID: <WED.4.NOV.2009.221829.0800.>

Hi All,

when I display "relative humidity" from wrf_output, I found some values
missing  ( please check the attachment), does it mean something wrong when
generate those values? or I made some mistakes when converted wrf_output
into Grads data format?( I use "ARWpost" to convert data), can you tell me
how to fix it?

Thank you.

--
Shenghui                    Student
Major:                         Physics
HuNan University          China
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From Wesley.Ebisuzaki at NOAA.GOV  Wed Nov  4 09:36:28 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Wed, 4 Nov 2009 09:36:28 -0500
Subject: R: R: Manage lat-lon thinned grid
In-Reply-To: <08254260B1EF444FBC3D0CD57A1F083B@trsspa.it>
Message-ID: <WED.4.NOV.2009.093628.0500.>

Diego,

I am running on a linux box and had no problem.

> -sh-3.00$ grib2ctl.pl -verf
> LFPW00190347.20090718153354_P4410PT779A_BPMG12.100964.b >junk.ctl
> -sh-3.00$ gribmap2 -i junk.ctl : I renamed gribmap version 2 as gribmap2
> grib1map: opening GRIB file:
> LFPW00190347.20090718153354_P4410PT779A_BPMG12.100964.b
> grib1map: reached end of files
> grib1map: writing the map...
>
versions:
grib2ctl.pl 0.9.12.5p45
wgrib v1.8.0.13e
gribmap 2.0.a3a

> missing end section
>
> 37 37 30 30
This suggests a problem with your input grib file. You may have
downloaded the
file as a text rather than a binary file.


Yours,
Wesley


Diego Morelli wrote:
> Really??
> Did you use grib2ctl (then wgrib), gribmap (contained in the grads 2 packet)
> and grads 2?
>
> Here, under grads 2.0.a7, the command perl grib2ctl.pl <file1name>.b >
> <file1name>.ctl, issue this error:
>
> missing end section
>
> 37 37 30 30
> ***script needs to be modified
> Unknown user-defined grid
>
> Infact the ctl file miss the xdef, ydef information.
>
> After, the command gribmap -I <file1name>.ctl -0, goes in segmentation
> fault.
>
> How did you do to manage this kind of file without the need to convert it in
> grib2?? It will be very interesting for me...
>
> Diego
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: marted? 3 novembre 2009 17.37
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: R: Manage lat-lon thinned grid
>
> Diego,
>
> For file #1, I was able to plot it in the original grib1 format. No need
> to convert it into grib2.
>
> Wesley
>
> Diego Morelli wrote:
>
>> Hello Wesley.
>>
>> I'm very glad to receive your help.
>>
>> I just tried to use grads 2, convgrib and wgrib2 and the result is success
>> for the "file #1".
>>
>> Ok for the file #2. Yours is a confirm that reinforce my opinion about its
>> handling.
>>
>> Regards,
>>
>> Diego
>>
>>
>> -----Messaggio originale-----
>> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
>> Wesley Ebisuzaki
>> Inviato: luned? 2 novembre 2009 23.05
>> A: GRADSUSR at LIST.CINECA.IT
>> Oggetto: Re: Manage lat-lon thinned grid
>>
>> Diego,
>>
>> File #1: I was able to plot the thinned grid using grads 2a05.
>> File #2: This file is hopeless. It is using complex packing of a grid
>> which is legal grib1 but
>> never used (AFAIK) until people started converting to grib2.
>>
>> Wesley Ebisuzaki
>>
>>
>> Diego Morelli wrote:
>>
>>
>>> * Problems *
>>>
>>> * *
>>>
>>> 1) I need to read with grads also the grib files with lat-long
>>> ?thinned? grids, I just know, by documentation, that my version
>>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>>> attachment an example of this kind of file s (LFPW?.)
>>>
>>> 2) I have some files that are managed by grads without error (version
>>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>>> in the attachment an example of this kind of file s (YMID?.)
>>>
>>> * My questions *
>>>
>>> How can I view, on a picture, information contained in files like
>>> those in the attachment?
>>>
>>> Is there any version of GrADS that manage them?
>>>
>>> Is there some work-around that I can follow to satisfy my need?
>>>
>>> If no, do you know any other software that I can be used?
>>>
>>> We are willing to pay for any new SW developments or your advice. Can
>>> you help us?
>>>
>>> Best regards,
>>>
>>> Diego
>>>
>>> -------------------------------------
>>>
>>> Diego Morelli
>>>
>>> T.R.S. S.p.A.
>>>
>>> Via della Bufalotta, 378 - 00139 Roma
>>>
>>> Tel. 06.87281.301
>>>
>>> Fax 06.87281.550
>>>
>>> diego.morelli at trs.it
>>>
>>>
>>>


From nathan at NATHANCOOL.COM  Wed Nov  4 09:38:03 2009
From: nathan at NATHANCOOL.COM (Nathan Cool)
Date: Wed, 4 Nov 2009 06:38:03 -0800
Subject: Vector arrows for primary wave direction
In-Reply-To: <72e8bd3d0911032158j572b89bgb4ffccfd2b26bccf@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.063803.0800.>

Thanks, but I'm not trying to display "wind" vector arrows; instead, I'm
trying to display the primary wave direction.

The vars in the Grib are:
------------------------
DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
UGRDsfc  0 33,1,1  ** surface u wind [m/s]
VGRDsfc  0 34,1,1  ** surface v wind [m/s]
WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]

...and I can see that others have been able to show the primary wave
direction (DIRPWsfc) using vector arrows, as is the case on the FNMOC models
like this one:
https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif

Do you know how this can be done?

Thanks,

-Nathan


On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik <sushantpuranik at gmail.com>wrote:

> Hi
> I am able to generate wind direction. try his
> 'set arrscl 1 30'
> 'set cthick 5'
> 'set arrowhead 0.10'
> 'set clevs 3 5 10 15 20 25'
> 'set ccols 0 4 1 2 3 5 12'
> 'set gxout vector'
> 'd
> skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
> 'run cbar.gs'
> 'printim wind(m/s)'
>
> with the help of such script i am able to generate output which is attached
> with this mail.
>
> all the best.
>
>
> On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool <nathan at nathancool.com> wrote:
>
>> Good morning everyone,
>>
>> I'm generating wave analysis models, but I'm having a tough time showing
>> the mean-wave (or primary) wave direction arrows.
>>
>> The vars in the Grib are:
>> -------------------------------------------------
>> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
>> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>
>> For displaying wind vector arrows it's straightforward as there are U and
>> V variables (UGRDsfc and VGRDsfc) for the zonal and meridional components.
>> Displaying primary wave direction though seems more elusive, yet I see it
>> done on many models such as the following:
>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>
>> ...which was generated using GrADS by FNMOC.
>>
>> Any help you can provide would be greatly appreciated, and thank you for
>> your time.
>>
>> --
>> Nathan Cool
>> nathan at nathancool.com
>>
>
>
>
> --
> Sushant Puranik
> Junior Research Fellow
> Dept. of Atmospheric & Space Sciences,
> University of Pune,
> Pune-07,
> India.
>
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From ctalbot at PRINCETON.EDU  Wed Nov  4 09:43:34 2009
From: ctalbot at PRINCETON.EDU (Charles Talbot)
Date: Wed, 4 Nov 2009 09:43:34 -0500
Subject: missing values in wrf_output
Message-ID: <WED.4.NOV.2009.094334.0500.>

  BODY { font-family:Arial, Helvetica, sans-serif;font-size:12px; }Hi
Shenghui,
 I think this has nothing to do with grads. This is probably due to a
different elevation in your topography (a mountain or a hill). If I am
right you should this problem for other variables as well in this
area. 
 Try to set, in ARWpost,  "interp_method = 0" to have values along
model levels. 
 Best,
 Charles
 On Wed 11/04/09 09:18 , sh zhou sh.maeam at GMAIL.COM sent:
 Hi All,
 when I display "relative humidity" from wrf_output, I found some
values missing  ( please check the attachment), does it mean
something wrong when generate those values? or I made some mistakes
when converted wrf_output into Grads data format?( I use "ARWpost" to
convert data), can you tell me how to fix it?
 Thank you.

 -- 
 Shenghui                    Student
 Major:                         Physics
 HuNan University          China
 
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From matthias.fripp at ECI.OX.AC.UK  Wed Nov  4 10:53:32 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Wed, 4 Nov 2009 15:53:32 +0000
Subject: Vector arrows for primary wave direction
In-Reply-To: <817a77c90911040638kf58ac1bic5f81fad439401fc@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.155332.0000.>

How about this:

set gxout vector
display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)

This converts the wave direction from degrees to radians, and then
calculates its u and v components.

Matthias

On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:

> Thanks, but I'm not trying to display "wind" vector arrows; instead,
> I'm trying to display the primary wave direction.
>
> The vars in the Grib are:
> ------------------------
> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>
> ...and I can see that others have been able to show the primary wave
> direction (DIRPWsfc) using vector arrows, as is the case on the
> FNMOC models like this one:
> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>
> Do you know how this can be done?
>
> Thanks,
>
> -Nathan
>
>
> On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik <sushantpuranik at gmail.com
> > wrote:
> Hi
> I am able to generate wind direction. try his
> 'set arrscl 1 30'
> 'set cthick 5'
> 'set arrowhead 0.10'
> 'set clevs 3 5 10 15 20 25'
> 'set ccols 0 4 1 2 3 5 12'
> 'set gxout vector'
> 'd skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc
> +VGRDsfc*VGRDsfc),2,2)'
> 'run cbar.gs'
> 'printim wind(m/s)'
>
> with the help of such script i am able to generate output which is
> attached with this mail.
>
> all the best.
>
>
> On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool <nathan at nathancool.com>
> wrote:
> Good morning everyone,
>
> I'm generating wave analysis models, but I'm having a tough time
> showing the mean-wave (or primary) wave direction arrows.
>
> The vars in the Grib are:
> -------------------------------------------------
> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>
> For displaying wind vector arrows it's straightforward as there are
> U and V variables (UGRDsfc and VGRDsfc) for the zonal and meridional
> components. Displaying primary wave direction though seems more
> elusive, yet I see it done on many models such as the following:
> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>
> ...which was generated using GrADS by FNMOC.
>
> Any help you can provide would be greatly appreciated, and thank you
> for your time.
>
> --
> Nathan Cool
> nathan at nathancool.com
>
>
>
> --
> Sushant Puranik
> Junior Research Fellow
> Dept. of Atmospheric & Space Sciences,
> University of Pune,
> Pune-07,
> India.
>

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From diego.morelli at TRS.IT  Wed Nov  4 11:06:28 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Wed, 4 Nov 2009 17:06:28 +0100
Subject: R: R: R: Manage lat-lon thinned grid
In-Reply-To: <4AF1916C.7060703@noaa.gov>
Message-ID: <WED.4.NOV.2009.170628.0100.>

Wesley, thank you for your valid support: I found that the trouble was in
grib2ctl version: my version was 0.9.12.5p34c.

Now I will continue to do my tests.

If you do not get bored too, let me get you two more questions:

Premise:
Its important for me to continue to work under Linux RH3 (It seem that the
new software doesn't work on this platform). I can abandon this platform
only if there isn't another solution for read my grib files.

The questions:

I have seen that if I use the last version of grib2ctl it generates a pdef
file and a descriptor file with some different format referring to the
0.9.12.5p34c version. I think that this fact obligates me to use gribmap2
then grads 2. Do you confirm?

I have seen also that if I continue to use the old softwares and insert by
hand the xdef, ydef information in the descriptor file issued by the old
grib2ctl ver 0.9.12.5p34c, I can continue to plot the meteo map with grads
1. Do you think this map information isn't correct? What is the difference
between the meteo map plot obtained with grads 1 and that obtained with
grads 2? Do you think that in one case there is a lost of information?


Diego


-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: mercoled? 4 novembre 2009 15.36
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: R: R: Manage lat-lon thinned grid

Diego,

I am running on a linux box and had no problem.

> -sh-3.00$ grib2ctl.pl -verf
> LFPW00190347.20090718153354_P4410PT779A_BPMG12.100964.b >junk.ctl
> -sh-3.00$ gribmap2 -i junk.ctl : I renamed gribmap version 2 as gribmap2
> grib1map: opening GRIB file:
> LFPW00190347.20090718153354_P4410PT779A_BPMG12.100964.b
> grib1map: reached end of files
> grib1map: writing the map...
>
versions:
grib2ctl.pl 0.9.12.5p45
wgrib v1.8.0.13e
gribmap 2.0.a3a

> missing end section
>
> 37 37 30 30
This suggests a problem with your input grib file. You may have
downloaded the
file as a text rather than a binary file.


Yours,
Wesley


Diego Morelli wrote:
> Really??
> Did you use grib2ctl (then wgrib), gribmap (contained in the grads 2
packet)
> and grads 2?
>
> Here, under grads 2.0.a7, the command perl grib2ctl.pl <file1name>.b >
> <file1name>.ctl, issue this error:
>
> missing end section
>
> 37 37 30 30
> ***script needs to be modified
> Unknown user-defined grid
>
> Infact the ctl file miss the xdef, ydef information.
>
> After, the command gribmap -I <file1name>.ctl -0, goes in segmentation
> fault.
>
> How did you do to manage this kind of file without the need to convert it
in
> grib2?? It will be very interesting for me...
>
> Diego
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: marted? 3 novembre 2009 17.37
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: R: Manage lat-lon thinned grid
>
> Diego,
>
> For file #1, I was able to plot it in the original grib1 format. No need
> to convert it into grib2.
>
> Wesley
>
> Diego Morelli wrote:
>
>> Hello Wesley.
>>
>> I'm very glad to receive your help.
>>
>> I just tried to use grads 2, convgrib and wgrib2 and the result is
success
>> for the "file #1".
>>
>> Ok for the file #2. Yours is a confirm that reinforce my opinion about
its
>> handling.
>>
>> Regards,
>>
>> Diego
>>
>>
>> -----Messaggio originale-----
>> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
>> Wesley Ebisuzaki
>> Inviato: luned? 2 novembre 2009 23.05
>> A: GRADSUSR at LIST.CINECA.IT
>> Oggetto: Re: Manage lat-lon thinned grid
>>
>> Diego,
>>
>> File #1: I was able to plot the thinned grid using grads 2a05.
>> File #2: This file is hopeless. It is using complex packing of a grid
>> which is legal grib1 but
>> never used (AFAIK) until people started converting to grib2.
>>
>> Wesley Ebisuzaki
>>
>>
>> Diego Morelli wrote:
>>
>>
>>> * Problems *
>>>
>>> * *
>>>
>>> 1) I need to read with grads also the grib files with lat-long
>>> ?thinned? grids, I just know, by documentation, that my version
>>> (1.8SL11) isn?t able to manage this kind of grib files. I put in the
>>> attachment an example of this kind of file s (LFPW
.)
>>>
>>> 2) I have some files that are managed by grads without error (version
>>> 1.8SL11), but the display command says: ?Entire Grid Undefined?. I put
>>> in the attachment an example of this kind of file s (YMID
.)
>>>
>>> * My questions *
>>>
>>> How can I view, on a picture, information contained in files like
>>> those in the attachment?
>>>
>>> Is there any version of GrADS that manage them?
>>>
>>> Is there some work-around that I can follow to satisfy my need?
>>>
>>> If no, do you know any other software that I can be used?
>>>
>>> We are willing to pay for any new SW developments or your advice. Can
>>> you help us?
>>>
>>> Best regards,
>>>
>>> Diego
>>>
>>> -------------------------------------
>>>
>>> Diego Morelli
>>>
>>> T.R.S. S.p.A.
>>>
>>> Via della Bufalotta, 378 - 00139 Roma
>>>
>>> Tel. 06.87281.301
>>>
>>> Fax 06.87281.550
>>>
>>> diego.morelli at trs.it
>>>
>>>
>>>


From javier.p at EREDA.COM  Wed Nov  4 11:12:05 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Wed, 4 Nov 2009 17:12:05 +0100
Subject: =?ISO-8859-1?Q?Obtenci=F3n_de_varias_variables_de_un_=2Egrib?=
Message-ID: <WED.4.NOV.2009.171205.0100.>

Hola a todos:

Estoy trabajando con Pcgrads en el sistema operativo windows xp. Tengo un
archivo .grib que contiene varias variables en un cierto rango de latitud,
longitud para un periodo de tiempo de 20 a?os, con datos cada 6 horas.
Mi pregunta es la siguiente ?como puedo leer este archivo con Pcgrads?
Un saludo:
Javier Pe?a

-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From javier.p at EREDA.COM  Wed Nov  4 11:21:47 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Wed, 4 Nov 2009 17:21:47 +0100
Subject: =?ISO-8859-1?Q?Obtenci=F3n_de_la_fecha_de_las_variables_de_un_archiv?=
 =?ISO-8859-1?Q?o_netcdf?=
Message-ID: <WED.4.NOV.2009.172147.0100.>

Hola a todos:

Tengo una archivo NetCdf del cual puedo obtener cualquiera de las variables
con el siguiente script:

*saca los valores de la componente u en una columna
'reinit'
'sdfopen prueba.nc'
'set lat 41'
'set lon 359'
'set lev 1'
to = 1
* Write the variable to a file
*'set gxout vector'
*'set fwrite z:\dummy.dat'
while (to<5)
'set t 'to
tmp=''
tmp=subwrd(rerult,4)
'd u';tmp=tmp%''subwrd(result,4)
rrc = write('c:\prueba_c\pruebas_archivo_ecmwf\new_u.txt',tmp)
to = to + 1
endwhile
set lev 1

pero mi pregunta es: ?puedo obtener la fecha a la que pertenece cada valor
de la variable? Es decir, si tengo valores para la componente u de la
velocidad: 2.3, 3.4, 5.6, 3.9 ?puedo obtener en un .txt lo siguiente?

Fecha                          U (m/s)
2009/12/06 00:00            2.3
2009/12/06 06:00            3.4
2009/12/06 18:00            5.6
2009/12/07 00:00            3.9

Muchas gracias. Un saludo:


-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From javier.p at EREDA.COM  Wed Nov  4 11:26:56 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Wed, 4 Nov 2009 17:26:56 +0100
Subject: how obtain the date from a NetCdf file
Message-ID: <WED.4.NOV.2009.172656.0100.>

Hello everyone,

I have a netcdf file from which I can obtain any of the variables with the
following script (for example to get u wind component):

* takes the values of the component or in a column
'reinit'
'sdfopen prueba.nc'
'set lat 41'
'set lon 359'
'set lev 1'
to = 1
* Write the variable to a file
* 'set gxout vector'
* 'set fwrite z: \ dummy.dat'
while (to <5)
'set t' to
tmp =''
tmp = subwrd (rerult, 4)
'd u', tmp = tmp%''subwrd (result, 4)
rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt', tmp)
to = to + 1
endwhile

but my question is, can I get the date which belongs each variable value?
That is, if I have values for the velocity component u: 2.3, 3.4, 5.6, 3.9,
can I get a. txt what next?

Date                         U (m / s)
2009/12/06 00:00          2.3
2009/12/06 06:00          3.4
2009/12/06 18:00          5.6
2009/12/07 00:00          3.9

Thank you very much. Best regards.

Javier Pe?a
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From javier.p at EREDA.COM  Wed Nov  4 11:52:44 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Wed, 4 Nov 2009 17:52:44 +0100
Subject: how read grib files with PcGrads
Message-ID: <WED.4.NOV.2009.175244.0100.>

Hello everyone,

I'm working with Pcgrads in the operating system Windows XP. I have a. Grib
that contains multiple variables in a certain range of latitude, longitude
for a period of 20 years with data every 6 hours.
My question is, how can I read this file with Pcgrads?
Thank you very much:

Javier Pe?a


-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From matthias.fripp at ECI.OX.AC.UK  Wed Nov  4 12:08:52 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Wed, 4 Nov 2009 17:08:52 +0000
Subject: how obtain the date from a NetCdf file
In-Reply-To: <607bb2140911040826q3be360d6g4b2ef889f4ff46b1@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.170852.0000.>

you could use something like this:

'q time'
datetime = subwrd(result, 3)

That will give you the date and time in grads format, e.g.,  
"00Z01JAN1979". If you want, you could go further, with something like  
this:

formatted_time = substr(datetime, 9, 4) '/' substr(datetime, 6, 3) '/'  
substr(datetime, 4, 2) ' ' substr(datetime, 1, 2) ':00'
say "formatted time: " formatted_time

Unfortunately, I don't know any way to convert "JAN" to "01" within  
grads. So you may need to use awk (or similar) to convert the dates  
after-the-fact, in which case you might as well just write the  
datetime directly to the file, and then convert that later.

Matthias

On Nov 4, 2009, at 4:26 PM, Javier Pe?a wrote:

> Hello everyone,
>
> I have a netcdf file from which I can obtain any of the variables  
> with the following script (for example to get u wind component):
>
> * takes the values of the component or in a column
> 'reinit'
> 'sdfopen prueba.nc'
> 'set lat 41'
> 'set lon 359'
> 'set lev 1'
> to = 1
> * Write the variable to a file
> * 'set gxout vector'
> * 'set fwrite z: \ dummy.dat'
> while (to <5)
> 'set t' to
> tmp =''
> tmp = subwrd (rerult, 4)
> 'd u', tmp = tmp%''subwrd (result, 4)
> rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt',  
> tmp)
> to = to + 1
> endwhile
>
> but my question is, can I get the date which belongs each variable  
> value? That is, if I have values for the velocity component u: 2.3,  
> 3.4, 5.6, 3.9, can I get a. txt what next?
>
> Date                         U (m / s)
> 2009/12/06 00:00          2.3
> 2009/12/06 06:00          3.4
> 2009/12/06 18:00          5.6
> 2009/12/07 00:00          3.9
>
> Thank you very much. Best regards.
>
> Javier Pe?a

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From owenfan0715 at SINA.COM.CN  Wed Nov  4 12:05:17 2009
From: owenfan0715 at SINA.COM.CN (=?ISO-8859-1?B?bGl6aGkubWlhbw==?=)
Date: Thu, 5 Nov 2009 01:05:17 +0800
Subject: Why did the OpenGrADS Bundle v2.0.a7.oga.3 fail to publish
 netCDF-4 datasets?
Message-ID: <THU.5.NOV.2009.010517.0800.>

Hi all,

I installed the OpenGrADS Bundle v2.0.a7.oga.3 (http://sourceforge.net/projects/opengrads/files/grads2/2.0.a7..oga.3/) and set <invoker grads_dir="/home/gds/grads-2.0.a7.oga.3/Classic/bin"/>. Then, I tried to restart my gds to publish the netcdf 3 and netcdf-4 files. The server was restarted, but only netcdf 3 files were published. The error was occured in gds.log as below:

error: can't import /LPRM AMSR_E_soil_moisture/2008/AMSR__OPER_R_LPRMSMA_L3A_20080510T000000_20080510T235959_0003; dummy CTL feature not supported by GrADS executable

If needed, I could attach the two netcdf files (one is netcdf 3, another is netcdf-4) .
Any suggestion will be appreciated! Thanks.

Best Regards,

Tim
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From nathan at NATHANCOOL.COM  Wed Nov  4 12:12:00 2009
From: nathan at NATHANCOOL.COM (Nathan Cool)
Date: Wed, 4 Nov 2009 09:12:00 -0800
Subject: Vector arrows for primary wave direction
In-Reply-To: <F1E26B4A-F23E-4A9B-BAF8-7C2C7C58330E@eci.ox.ac.uk>
Message-ID: <WED.4.NOV.2009.091200.0800.>

Thanks Matthias. I sure do appreciate the help. That produced some
interesting results, but it didn't seem accurate (arrows pointing in some
rather bizarre directions). Perhaps though this is a data problem, and I
need to grab different GRIB files? Currently, I'm using GRIBs from the NCEP
server:
ftp://polar.ncep.noaa.gov/pub/waves/latest_run/

-Nathan


On Wed, Nov 4, 2009 at 7:53 AM, Matthias Fripp
<matthias.fripp at eci.ox.ac.uk>wrote:

> How about this:
>
> set gxout vector
> display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)
>
> This converts the wave direction from degrees to radians, and then
> calculates its u and v components.
>
> Matthias
>
> On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:
>
> Thanks, but I'm not trying to display "wind" vector arrows; instead, I'm
> trying to display the primary wave direction.
>
> The vars in the Grib are:
> ------------------------
> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>
> ...and I can see that others have been able to show the primary wave
> direction (DIRPWsfc) using vector arrows, as is the case on the FNMOC models
> like this one:
> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>
> Do you know how this can be done?
>
> Thanks,
>
> -Nathan
>
>
> On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik <sushantpuranik at gmail.com>wrote:
>
>> Hi
>> I am able to generate wind direction. try his
>> 'set arrscl 1 30'
>> 'set cthick 5'
>> 'set arrowhead 0.10'
>> 'set clevs 3 5 10 15 20 25'
>> 'set ccols 0 4 1 2 3 5 12'
>> 'set gxout vector'
>> 'd
>> skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
>> 'run cbar.gs'
>> 'printim wind(m/s)'
>>
>> with the help of such script i am able to generate output which is
>> attached with this mail.
>>
>> all the best.
>>
>>
>> On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool <nathan at nathancool.com>wrote:
>>
>>> Good morning everyone,
>>>
>>> I'm generating wave analysis models, but I'm having a tough time showing
>>> the mean-wave (or primary) wave direction arrows.
>>>
>>> The vars in the Grib are:
>>> -------------------------------------------------
>>> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>>> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>>> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
>>> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>>> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>>> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>>> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>>
>>> For displaying wind vector arrows it's straightforward as there are U and
>>> V variables (UGRDsfc and VGRDsfc) for the zonal and meridional components.
>>> Displaying primary wave direction though seems more elusive, yet I see it
>>> done on many models such as the following:
>>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>>
>>> ...which was generated using GrADS by FNMOC.
>>>
>>> Any help you can provide would be greatly appreciated, and thank you for
>>> your time.
>>>
>>> --
>>> Nathan Cool
>>> nathan at nathancool.com
>>>
>>
>>
>>
>> --
>> Sushant Puranik
>> Junior Research Fellow
>> Dept. of Atmospheric & Space Sciences,
>> University of Pune,
>> Pune-07,
>> India.
>>
>
>
>
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From jma at COLA.IGES.ORG  Wed Nov  4 12:47:17 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Wed, 4 Nov 2009 12:47:17 -0500
Subject: Why did the OpenGrADS Bundle v2.0.a7.oga.3 fail to publish
 netCDF-4 datasets?
In-Reply-To: <tencent_462D657A0FF6CF824EB3D5FB@qq.com>
Message-ID: <WED.4.NOV.2009.124717.0500.>

That 'dummy CTL' message means that GrADS was unable to open your file
with sdfopen, xdfopen, or open. Try writing a descriptor file and re-
configuring your GDS to serve that instead. While you're at it, take
pity on your potential users and rename your data set from
"AMSR__OPER_R_LPRMSMA_L3A_20080510T000000_20080510T235959_0003" to
something short and meaningful.
--Jennifer


On Nov 4, 2009, at 12:05 PM, lizhi.miao wrote:

> Hi all,
>
> I installed the OpenGrADS Bundle v2.0.a7.oga.3 (http://sourceforge.net/projects/opengrads/files/grads2/2.0.a7..oga.3/
> ) and set <invoker grads_dir="/home/gds/grads-2.0.a7.oga.3/Classic/
> bin"/>. Then, I tried to restart my gds to publish the netcdf 3 and
> netcdf-4 files. The server was restarted, but only netcdf 3 files
> were published. The error was occured in gds.log as below:
>
> error: can't import /LPRM AMSR_E_soil_moisture/2008/
> AMSR__OPER_R_LPRMSMA_L3A_20080510T000000_20080510T235959_0003; dummy
> CTL feature not supported by GrADS executable
>
> If needed, I could attach the two netcdf files (one is netcdf 3,
> another is netcdf-4) .
> Any suggestion will be appreciated! Thanks.
>
> Best Regards,
>
> Tim

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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From diego.morelli at TRS.IT  Wed Nov  4 13:00:39 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Wed, 4 Nov 2009 19:00:39 +0100
Subject: Manage lat-lon thinned grid: Conclusion
Message-ID: <WED.4.NOV.2009.190039.0100.>


From jimp at HAWAII.EDU  Wed Nov  4 13:10:37 2009
From: jimp at HAWAII.EDU (James T. Potemra)
Date: Wed, 4 Nov 2009 08:10:37 -1000
Subject: Vector arrows for primary wave direction
In-Reply-To: <817a77c90911040912sdc57013y276c9a71a2af9c4a@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.081037.1000.>

Hi Nathan:

Matthias suggestion is correct, but I think you need to be careful with
the direction.  His calculation
presumes that the direction is measured counterclockwise from the east
(so a direction of zero would
be a wave headed due east, direction 90 would be headed north, and so
on).  The direction from the
model is probably compass heading (0 is north).  So, you might have to
add an extra step to convert
the direction angle.

Jim

Nathan Cool wrote:
> Thanks Matthias. I sure do appreciate the help. That produced some
> interesting results, but it didn't seem accurate (arrows pointing in
> some rather bizarre directions). Perhaps though this is a data
> problem, and I need to grab different GRIB files? Currently, I'm using
> GRIBs from the NCEP server:
> ftp://polar.ncep.noaa.gov/pub/waves/latest_run/
>
> -Nathan
>
>
> On Wed, Nov 4, 2009 at 7:53 AM, Matthias Fripp
> <matthias.fripp at eci.ox.ac.uk <mailto:matthias.fripp at eci.ox.ac.uk>> wrote:
>
>     How about this:
>
>     set gxout vector
>     display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)
>
>     This converts the wave direction from degrees to radians, and then
>     calculates its u and v components.
>
>     Matthias
>
>     On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:
>
>>     Thanks, but I'm not trying to display "wind" vector arrows;
>>     instead, I'm trying to display the primary wave direction.
>>
>>     The vars in the Grib are:
>>     ------------------------
>>     DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>>     DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>>     HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and
>>     swell [m]
>>     PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>>     PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>>     UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>     VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>     WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>     WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>     WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>>     WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>
>>     ...and I can see that others have been able to show the primary
>>     wave direction (DIRPWsfc) using vector arrows, as is the case on
>>     the FNMOC models like this one:
>>     https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>
>>     Do you know how this can be done?
>>
>>     Thanks,
>>
>>     -Nathan
>>
>>
>>     On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik
>>     <sushantpuranik at gmail.com <mailto:sushantpuranik at gmail.com>> wrote:
>>
>>         Hi
>>         I am able to generate wind direction. try his
>>         'set arrscl 1 30'
>>         'set cthick 5'
>>         'set arrowhead 0.10'
>>         'set clevs 3 5 10 15 20 25'
>>         'set ccols 0 4 1 2 3 5 12'
>>         'set gxout vector'
>>         'd
>>         skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
>>         'run cbar.gs <http://cbar.gs>'
>>         'printim wind(m/s)'
>>
>>         with the help of such script i am able to generate output
>>         which is attached with this mail.
>>
>>         all the best.
>>
>>
>>         On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool
>>         <nathan at nathancool.com <mailto:nathan at nathancool.com>> wrote:
>>
>>             Good morning everyone,
>>
>>             I'm generating wave analysis models, but I'm having a
>>             tough time showing the mean-wave (or primary) wave
>>             direction arrows.
>>
>>             The vars in the Grib are:
>>             -------------------------------------------------
>>             DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>>             DIRSWsfc  0 109,1,1  ** surface Secondary wave direction
>>             [deg]
>>             HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves
>>             and swell [m]
>>             PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>>             PERSWsfc  0 110,1,1  ** surface Secondary wave mean
>>             period [s]
>>             UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>             VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>             WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>             WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>             WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>>             WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>
>>             For displaying wind vector arrows it's straightforward as
>>             there are U and V variables (UGRDsfc and VGRDsfc) for the
>>             zonal and meridional components. Displaying primary wave
>>             direction though seems more elusive, yet I see it done on
>>             many models such as the following:
>>             https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>
>>             ...which was generated using GrADS by FNMOC.
>>
>>             Any help you can provide would be greatly appreciated,
>>             and thank you for your time.
>>
>>             --
>>             Nathan Cool
>>             nathan at nathancool.com <mailto:nathan at nathancool.com>
>>
>>
>>
>>
>>         --
>>         Sushant Puranik
>>         Junior Research Fellow
>>         Dept. of Atmospheric & Space Sciences,
>>         University of Pune,
>>         Pune-07,
>>         India.
>>
>>
>
>


From matthias.fripp at ECI.OX.AC.UK  Wed Nov  4 13:12:48 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Wed, 4 Nov 2009 18:12:48 +0000
Subject: Vector arrows for primary wave direction
In-Reply-To: <817a77c90911040912sdc57013y276c9a71a2af9c4a@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.181248.0000.>

Hi Nathan,

The equations I gave you assume that "0 degrees" corresponds to due
east, and that the angle counts up as you go counterclockwise. You
would need different equations if these assumptions are not true.
e.g., if the angle shows the number of degrees clockwise from north,
you would need something like this:

display cos((90-DIRPWsfc) * 3.14159/180); sin((90-DIRPWsfc) *
3.14159/180)

If that's not the problem, then it could indeed be a data error.

Best,

Matthias


It sounds like it could be a data problem (I don't know the
On Nov 4, 2009, at 5:12 PM, Nathan Cool wrote:

> Thanks Matthias. I sure do appreciate the help. That produced some
> interesting results, but it didn't seem accurate (arrows pointing in
> some rather bizarre directions). Perhaps though this is a data
> problem, and I need to grab different GRIB files? Currently, I'm
> using GRIBs from the NCEP server:
> ftp://polar.ncep.noaa.gov/pub/waves/latest_run/
>
> -Nathan
>
>
> On Wed, Nov 4, 2009 at 7:53 AM, Matthias Fripp <matthias.fripp at eci.ox.ac.uk
> > wrote:
> How about this:
>
> set gxout vector
> display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)
>
> This converts the wave direction from degrees to radians, and then
> calculates its u and v components.
>
> Matthias
>
> On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:
>
>> Thanks, but I'm not trying to display "wind" vector arrows;
>> instead, I'm trying to display the primary wave direction.
>>
>> The vars in the Grib are:
>> ------------------------
>> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell
>> [m]
>> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>
>> ...and I can see that others have been able to show the primary
>> wave direction (DIRPWsfc) using vector arrows, as is the case on
>> the FNMOC models like this one:
>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>
>> Do you know how this can be done?
>>
>> Thanks,
>>
>> -Nathan
>>
>>
>> On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik <sushantpuranik at gmail.com
>> > wrote:
>> Hi
>> I am able to generate wind direction. try his
>> 'set arrscl 1 30'
>> 'set cthick 5'
>> 'set arrowhead 0.10'
>> 'set clevs 3 5 10 15 20 25'
>> 'set ccols 0 4 1 2 3 5 12'
>> 'set gxout vector'
>> 'd skip(UGRDsfc,2,2);skip(VGRDsfc,2,2);skip(sqrt(UGRDsfc*UGRDsfc
>> +VGRDsfc*VGRDsfc),2,2)'
>> 'run cbar.gs'
>> 'printim wind(m/s)'
>>
>> with the help of such script i am able to generate output which is
>> attached with this mail.
>>
>> all the best.
>>
>>
>> On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool <nathan at nathancool.com>
>> wrote:
>> Good morning everyone,
>>
>> I'm generating wave analysis models, but I'm having a tough time
>> showing the mean-wave (or primary) wave direction arrows.
>>
>> The vars in the Grib are:
>> -------------------------------------------------
>> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell
>> [m]
>> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>
>> For displaying wind vector arrows it's straightforward as there are
>> U and V variables (UGRDsfc and VGRDsfc) for the zonal and
>> meridional components. Displaying primary wave direction though
>> seems more elusive, yet I see it done on many models such as the
>> following:
>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>
>> ...which was generated using GrADS by FNMOC.
>>
>> Any help you can provide would be greatly appreciated, and thank
>> you for your time.
>>
>> --
>> Nathan Cool
>> nathan at nathancool.com
>>
>>
>>
>> --
>> Sushant Puranik
>> Junior Research Fellow
>> Dept. of Atmospheric & Space Sciences,
>> University of Pune,
>> Pune-07,
>> India.
>>
>
>

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From matthias.fripp at ECI.OX.AC.UK  Wed Nov  4 13:18:49 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Wed, 4 Nov 2009 18:18:49 +0000
Subject: Vector arrows for primary wave direction
In-Reply-To: <4AF1C39D.5090803@hawaii.edu>
Message-ID: <WED.4.NOV.2009.181849.0000.>

That's right -- I just checked this page ( http://polar.ncep.noaa.gov/waves/products.html
  ), which reports that the datasets use the "oceanographical
convention", and this page ( http://www.aims.gov.au/pages/facilities/oceanographic-buoys/ob-1.html
  ), which says that the oceanographic convention is to show "the
direction the current is flowing towards, measured in degrees
clockwise from North".

If you replace DIRPWsfc with (90 - DIRPWsfc), you can convert between
the two conventions. So that would give you

set gxout vector
display cos((90-DIRPWsfc) * 3.14159/180); sin((90-DIRPWsfc) *
3.14159/180)

Sorry about that -- I'm so used to the physicists' approach to angles
that I forgot about the real world!

Matthias

On Nov 4, 2009, at 6:10 PM, James T. Potemra wrote:

> Hi Nathan:
>
> Matthias suggestion is correct, but I think you need to be careful
> with
> the direction.  His calculation
> presumes that the direction is measured counterclockwise from the east
> (so a direction of zero would
> be a wave headed due east, direction 90 would be headed north, and so
> on).  The direction from the
> model is probably compass heading (0 is north).  So, you might have to
> add an extra step to convert
> the direction angle.
>
> Jim
>
> Nathan Cool wrote:
>> Thanks Matthias. I sure do appreciate the help. That produced some
>> interesting results, but it didn't seem accurate (arrows pointing in
>> some rather bizarre directions). Perhaps though this is a data
>> problem, and I need to grab different GRIB files? Currently, I'm
>> using
>> GRIBs from the NCEP server:
>> ftp://polar.ncep.noaa.gov/pub/waves/latest_run/
>>
>> -Nathan
>>
>>
>> On Wed, Nov 4, 2009 at 7:53 AM, Matthias Fripp
>> <matthias.fripp at eci.ox.ac.uk <mailto:matthias.fripp at eci.ox.ac.uk>>
>> wrote:
>>
>>    How about this:
>>
>>    set gxout vector
>>    display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)
>>
>>    This converts the wave direction from degrees to radians, and then
>>    calculates its u and v components.
>>
>>    Matthias
>>
>>    On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:
>>
>>>    Thanks, but I'm not trying to display "wind" vector arrows;
>>>    instead, I'm trying to display the primary wave direction.
>>>
>>>    The vars in the Grib are:
>>>    ------------------------
>>>    DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>>>    DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>>>    HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and
>>>    swell [m]
>>>    PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>>>    PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>>>    UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>>    VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>>    WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>>    WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>>    WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>>>    WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>>
>>>    ...and I can see that others have been able to show the primary
>>>    wave direction (DIRPWsfc) using vector arrows, as is the case on
>>>    the FNMOC models like this one:
>>>    https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>>
>>>    Do you know how this can be done?
>>>
>>>    Thanks,
>>>
>>>    -Nathan
>>>
>>>
>>>    On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik
>>>    <sushantpuranik at gmail.com <mailto:sushantpuranik at gmail.com>>
>>> wrote:
>>>
>>>        Hi
>>>        I am able to generate wind direction. try his
>>>        'set arrscl 1 30'
>>>        'set cthick 5'
>>>        'set arrowhead 0.10'
>>>        'set clevs 3 5 10 15 20 25'
>>>        'set ccols 0 4 1 2 3 5 12'
>>>        'set gxout vector'
>>>        'd
>>>        skip(UGRDsfc,2,2);skip(VGRDsfc,
>>> 2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
>>>        'run cbar.gs <http://cbar.gs>'
>>>        'printim wind(m/s)'
>>>
>>>        with the help of such script i am able to generate output
>>>        which is attached with this mail.
>>>
>>>        all the best.
>>>
>>>
>>>        On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool
>>>        <nathan at nathancool.com <mailto:nathan at nathancool.com>> wrote:
>>>
>>>            Good morning everyone,
>>>
>>>            I'm generating wave analysis models, but I'm having a
>>>            tough time showing the mean-wave (or primary) wave
>>>            direction arrows.
>>>
>>>            The vars in the Grib are:
>>>            -------------------------------------------------
>>>            DIRPWsfc  0 107,1,1  ** surface Primary wave direction
>>> [deg]
>>>            DIRSWsfc  0 109,1,1  ** surface Secondary wave direction
>>>            [deg]
>>>            HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves
>>>            and swell [m]
>>>            PERPWsfc  0 108,1,1  ** surface Primary wave mean
>>> period [s]
>>>            PERSWsfc  0 110,1,1  ** surface Secondary wave mean
>>>            period [s]
>>>            UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>>            VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>>            WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>>            WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>>            WVDIRsfc  0 101,1,1  ** surface Direction of wind waves
>>> [deg]
>>>            WVPERsfc  0 103,1,1  ** surface Mean period of wind
>>> waves [s]
>>>
>>>            For displaying wind vector arrows it's straightforward as
>>>            there are U and V variables (UGRDsfc and VGRDsfc) for the
>>>            zonal and meridional components. Displaying primary wave
>>>            direction though seems more elusive, yet I see it done on
>>>            many models such as the following:
>>>            https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>>
>>>            ...which was generated using GrADS by FNMOC.
>>>
>>>            Any help you can provide would be greatly appreciated,
>>>            and thank you for your time.
>>>
>>>            --
>>>            Nathan Cool
>>>            nathan at nathancool.com <mailto:nathan at nathancool.com>
>>>
>>>
>>>
>>>
>>>        --
>>>        Sushant Puranik
>>>        Junior Research Fellow
>>>        Dept. of Atmospheric & Space Sciences,
>>>        University of Pune,
>>>        Pune-07,
>>>        India.
>>>
>>>
>>
>>


From dasilva at OPENGRADS.ORG  Wed Nov  4 14:16:48 2009
From: dasilva at OPENGRADS.ORG (Arlindo da Silva)
Date: Wed, 4 Nov 2009 14:16:48 -0500
Subject: Opengrads for AIX Server supported by Grads1.8
In-Reply-To: <20091104065835.0000356B.0005@hydra.t.u-tokyo.ac.jp>
Message-ID: <WED.4.NOV.2009.141648.0500.>

On Wed, Nov 4, 2009 at 1:58 AM, Shakil AHMAD
<ahmad-s at hydra.t.u-tokyo.ac.jp>wrote:

> Dear Sir/Madam,
>
> I am PhD student at The university of Tokyo. I am using Opengrads
> extensions for my analysis on Linux Server.
>
>
Please do not write to me directly with questions like this. Instead, aski
these questions on the gradsusr mailing list for the benefit of others.



> No I have been shifted to AIX server, but Opengrads can support Grads1.9
> or above version, and for AIX server Grads1.8 (old version) is available,
>  which cannot support Opengrads and its extensions.
>
>
Is available where? I have made 2 releases of the OpenGrADS bundle for AIX,
see

   https://sourceforge.net/projects/opengrads/files/

   https://sourceforge.net/projects/opengrads/files/



> Could you suggest me how to resolve the issue or any other version of
> Opengrads for Grads1.8 version.
>
>
Why do you need to use GrADS v1.8?  Have you tried the OpenGrADS Bundle
builds for AIX? I have not yet released the last 2.0.a7.oga.3 for AIX, but I
should be able to do so in the near future.

      Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Wed Nov  4 14:20:55 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Wed, 4 Nov 2009 14:20:55 -0500
Subject: how read grib files with PcGrads
In-Reply-To: <607bb2140911040852i44ef88b5ra8c017194b0507bd@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.142055.0500.>

On Wed, Nov 4, 2009 at 11:52 AM, Javier Pe?a <javier.p at ereda.com> wrote:

> Hello everyone,
>
> I'm working with Pcgrads in the operating system Windows XP. I have a. Grib
> that contains multiple variables in a certain range of latitude, longitude
> for a period of 20 years with data every 6 hours.
> My question is, how can I read this file with Pcgrads?
>

What have you tried? Have you read the on-line GrADS documentation?

    Arlindo

-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From cmunozc at UDEC.CL  Wed Nov  4 14:43:08 2009
From: cmunozc at UDEC.CL (Cristian Gonzal =?iso-8859-1?Q?Mu=F1oz_Castillo?=)
Date: Wed, 4 Nov 2009 16:43:08 -0300
Subject: =?iso-8859-1?Q?Obtenci=F3n_de_varias_variables_de_un_.grib?=
In-Reply-To: <607bb2140911040812l1d37140cy38c546462482c3a5@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.164308.0300.>

Hola Javier,

Generalmente los archivos debes leerlos a traves de un archivo de control
(uno con extension .ctl) que haga referencia al archivo .grib que
utilizas. Googlea "grads control file" y de seguro encontraras lo que
andas buscando.

Saludos

> Hola a todos:
>
> Estoy trabajando con Pcgrads en el sistema operativo windows xp. Tengo un
> archivo .grib que contiene varias variables en un cierto rango de latitud,
> longitud para un periodo de tiempo de 20 a?os, con datos cada 6 horas.
> Mi pregunta es la siguiente ?como puedo leer este archivo con Pcgrads?
> Un saludo:
> Javier Pe?a
>
> --
> Javier Pe?a ?lvarez
> Energ?as Renovables
> javier.p at ereda.com
> EREDA
>
>                            Tel:  +34 91 5014755
>                            Fax: +34 91 5014756
>                  c/ T?llez 26, 28007 MADRID
>                                    www.ereda.com
>


--
Cristian G. Mu?oz Castillo
Geof?sico
Licenciado en Ciencias F?sicas
Oficina 442
Depto. Geof?sica (DGEO)
Fono (41) 2203155
Facultad Ciencias F?sicas y Matem?ticas
Universidad de Concepci?n
Concepci?n
Chile


From nathan at NATHANCOOL.COM  Wed Nov  4 14:59:31 2009
From: nathan at NATHANCOOL.COM (Nathan Cool)
Date: Wed, 4 Nov 2009 11:59:31 -0800
Subject: Vector arrows for primary wave direction
In-Reply-To: <ED8283B9-F5B3-4D06-8EA6-A2A0CFDCD39F@eci.ox.ac.uk>
Message-ID: <WED.4.NOV.2009.115931.0800.>

Thanks Matthias and James! That did the trick. I sure do appreciate all the
help on this.

btw: I ended up having to use 270 to convert to the proper angle:

d skip(cos((270-DIRPWsfc) * 3.14159/180),3,3); skip(sin((270-DIRPWsfc) *
3.14159/180),3,3)

Thanks again,

-Nathan


On Wed, Nov 4, 2009 at 10:18 AM, Matthias Fripp <matthias.fripp at eci.ox.ac.uk
> wrote:

> That's right -- I just checked this page (
> http://polar.ncep.noaa.gov/waves/products.html
>  ), which reports that the datasets use the "oceanographical
> convention", and this page (
> http://www.aims.gov.au/pages/facilities/oceanographic-buoys/ob-1.html
>  ), which says that the oceanographic convention is to show "the
> direction the current is flowing towards, measured in degrees
> clockwise from North".
>
> If you replace DIRPWsfc with (90 - DIRPWsfc), you can convert between
> the two conventions. So that would give you
>
> set gxout vector
> display cos((90-DIRPWsfc) * 3.14159/180); sin((90-DIRPWsfc) *
> 3.14159/180)
>
> Sorry about that -- I'm so used to the physicists' approach to angles
> that I forgot about the real world!
>
> Matthias
>
>
> On Nov 4, 2009, at 6:10 PM, James T. Potemra wrote:
>
>  Hi Nathan:
>>
>> Matthias suggestion is correct, but I think you need to be careful
>> with
>> the direction.  His calculation
>> presumes that the direction is measured counterclockwise from the east
>> (so a direction of zero would
>> be a wave headed due east, direction 90 would be headed north, and so
>> on).  The direction from the
>> model is probably compass heading (0 is north).  So, you might have to
>> add an extra step to convert
>> the direction angle.
>>
>> Jim
>>
>> Nathan Cool wrote:
>>
>>> Thanks Matthias. I sure do appreciate the help. That produced some
>>> interesting results, but it didn't seem accurate (arrows pointing in
>>> some rather bizarre directions). Perhaps though this is a data
>>> problem, and I need to grab different GRIB files? Currently, I'm
>>> using
>>> GRIBs from the NCEP server:
>>> ftp://polar.ncep.noaa.gov/pub/waves/latest_run/
>>>
>>> -Nathan
>>>
>>>
>>> On Wed, Nov 4, 2009 at 7:53 AM, Matthias Fripp
>>> <matthias.fripp at eci.ox.ac.uk <mailto:matthias.fripp at eci.ox.ac.uk>>
>>> wrote:
>>>
>>>   How about this:
>>>
>>>   set gxout vector
>>>   display cos(DIRPWsfc * 3.14159/180); sin(DIRPWsfc * 3.14159/180)
>>>
>>>   This converts the wave direction from degrees to radians, and then
>>>   calculates its u and v components.
>>>
>>>   Matthias
>>>
>>>   On Nov 4, 2009, at 2:38 PM, Nathan Cool wrote:
>>>
>>>    Thanks, but I'm not trying to display "wind" vector arrows;
>>>>   instead, I'm trying to display the primary wave direction.
>>>>
>>>>   The vars in the Grib are:
>>>>   ------------------------
>>>>   DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
>>>>   DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
>>>>   HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and
>>>>   swell [m]
>>>>   PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
>>>>   PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
>>>>   UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>>>   VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>>>   WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>>>   WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>>>   WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
>>>>   WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>>>>
>>>>   ...and I can see that others have been able to show the primary
>>>>   wave direction (DIRPWsfc) using vector arrows, as is the case on
>>>>   the FNMOC models like this one:
>>>>
>>>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>>>
>>>>   Do you know how this can be done?
>>>>
>>>>   Thanks,
>>>>
>>>>   -Nathan
>>>>
>>>>
>>>>   On Tue, Nov 3, 2009 at 9:58 PM, sushant puranik
>>>>   <sushantpuranik at gmail.com <mailto:sushantpuranik at gmail.com>>
>>>> wrote:
>>>>
>>>>       Hi
>>>>       I am able to generate wind direction. try his
>>>>       'set arrscl 1 30'
>>>>       'set cthick 5'
>>>>       'set arrowhead 0.10'
>>>>       'set clevs 3 5 10 15 20 25'
>>>>       'set ccols 0 4 1 2 3 5 12'
>>>>       'set gxout vector'
>>>>       'd
>>>>       skip(UGRDsfc,2,2);skip(VGRDsfc,
>>>> 2,2);skip(sqrt(UGRDsfc*UGRDsfc+VGRDsfc*VGRDsfc),2,2)'
>>>>       'run cbar.gs <http://cbar.gs>'
>>>>       'printim wind(m/s)'
>>>>
>>>>       with the help of such script i am able to generate output
>>>>       which is attached with this mail.
>>>>
>>>>       all the best.
>>>>
>>>>
>>>>       On Tue, Nov 3, 2009 at 9:45 PM, Nathan Cool
>>>>       <nathan at nathancool.com <mailto:nathan at nathancool.com>> wrote:
>>>>
>>>>           Good morning everyone,
>>>>
>>>>           I'm generating wave analysis models, but I'm having a
>>>>           tough time showing the mean-wave (or primary) wave
>>>>           direction arrows.
>>>>
>>>>           The vars in the Grib are:
>>>>           -------------------------------------------------
>>>>           DIRPWsfc  0 107,1,1  ** surface Primary wave direction
>>>> [deg]
>>>>           DIRSWsfc  0 109,1,1  ** surface Secondary wave direction
>>>>           [deg]
>>>>           HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves
>>>>           and swell [m]
>>>>           PERPWsfc  0 108,1,1  ** surface Primary wave mean
>>>> period [s]
>>>>           PERSWsfc  0 110,1,1  ** surface Secondary wave mean
>>>>           period [s]
>>>>           UGRDsfc  0 33,1,1  ** surface u wind [m/s]
>>>>           VGRDsfc  0 34,1,1  ** surface v wind [m/s]
>>>>           WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
>>>>           WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
>>>>           WVDIRsfc  0 101,1,1  ** surface Direction of wind waves
>>>> [deg]
>>>>           WVPERsfc  0 103,1,1  ** surface Mean period of wind
>>>> waves [s]
>>>>
>>>>           For displaying wind vector arrows it's straightforward as
>>>>           there are U and V variables (UGRDsfc and VGRDsfc) for the
>>>>           zonal and meridional components. Displaying primary wave
>>>>           direction though seems more elusive, yet I see it done on
>>>>           many models such as the following:
>>>>
>>>> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>>>>
>>>>           ...which was generated using GrADS by FNMOC.
>>>>
>>>>           Any help you can provide would be greatly appreciated,
>>>>           and thank you for your time.
>>>>
>>>>           --
>>>>           Nathan Cool
>>>>           nathan at nathancool.com <mailto:nathan at nathancool.com>
>>>>
>>>>
>>>>
>>>>
>>>>       --
>>>>       Sushant Puranik
>>>>       Junior Research Fellow
>>>>       Dept. of Atmospheric & Space Sciences,
>>>>       University of Pune,
>>>>       Pune-07,
>>>>       India.
>>>>
>>>>
>>>>
>>>
>>>
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From dasilva at ALUM.MIT.EDU  Wed Nov  4 15:46:32 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Wed, 4 Nov 2009 15:46:32 -0500
Subject: OpenGrADS Bundle binaries for AIX
Message-ID: <WED.4.NOV.2009.154632.0500.>

Hi,

  I just posted AIX binaries for the OpenGrADS Bundle v2.0.a7.oga.3. If you
download these,  I'd appreciate feedback as to whether these binaries are
working or not for you.


http://sourceforge.net/projects/opengrads/files/grads2/2.0.a7.oga.3/

  Thank you,

      Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From h.meteo.shirazu at GMAIL.COM  Wed Nov  4 16:09:40 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Wed, 4 Nov 2009 15:09:40 -0600
Subject: export data to a txt file
Message-ID: <WED.4.NOV.2009.150940.0600.>

Hi All grads user
I have a file contain vorticity variable,I want save It's data to a txt file

I have fprintf.gs script file to do this,but it can't save vorticity,
latitude,longitude to one txt file.
Any suggestion will be appreciated,
thanks
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function fprintf(args)
 
* Command line argumets
* ---------------------
  expr = subwrd(args,1)
  file = subwrd(args,2)
  format = subwrd(args,3)
  numl = subwrd(args,4)
  numb = subwrd(args,5)
  u = subwrd(args,6)
 
  if ( file='' )
    say ''
    say 'NAME'
    say '     fprintf - print GrADS variables to a text file'
    say ''
    say 'SYNOPSIS'
    say '     fprintf  expr  txtFile  [format numl numb [u]]'
    say ''
    say 'DESCRIPTION'
    say '     Evaluates the contents of the GrADS expression *expr* writing'
    say '     its values to a formatted text file *txtFile*. On output, the'
    say '     number of values and the undef values are returned; a negative'
    say '     number of values signals an error condition.'
    say ''
    say '     Unlike the output of *set gxout print*, the resulting ASCII'
    say '     file has only the data values and *no header*.'
    say ''
    say 'OPTIONS'
    say '     The optional parameters are the same as the ones required by'
    say '     the GrADS command *set prnopts*, namely'
    say '     format   a C language template for formatting ASCII output.'
    say '              Default is %g.'
    say '     numl     number of values to print per record. Default is 8.'
    say '     numb     number of blanks to insert between values. Default is 1.'
    say '     u        print "Undef" instead of the numerical value for'
    say '              missing data.'
    say 'BUGS'
    say '     The GrADS expression cannot have spaces in it.'
    say ''    
    say 'COPYRIGHT'
    say '     This script has been placed in the public domain'
    say ''
    return
  endif
 
* Set the display environment and produce buffered ASCII output
* -------------------------------------------------------------
  'set gxout print'
  if ( format != '' )
    'set prnopts ' format ' ' numl ' ' numb ' ' u ' '
  endif
  'display ' expr
   if ( rc!=0 ); return -1; endif
 
*  Get rid of header line: Printing Grid -- 3358 Values -- Undef = 1e+20
*  but record number of values and undef values for later reference
*  ---------------------------------------------------------------------
   buffer = result
   i = 1; line = sublin(buffer,i)
   n = subwrd(line,4)
   undef = subwrd(line,9)
 
* Now write the data values to text file: first line...
* -----------------------------------------------------
  i = 2; line = sublin(buffer,i)
  if ( write_(file,line) > 0 ); return -2; endif
 
* Append subsequent lines
* -----------------------
  i = i + 1; line = sublin(buffer,i)
  while ( line != '' )
    if ( write_(file,line,append) != 0 ); return -3; endif 
    i = i + 1; line = sublin(buffer,i)
  endwhile
  if ( close(file) != 0 ); return -4; endif
 
* All done
* --------
  say 'wrote ' n ' values to file "' file '"'
  return n ' ' undef ' ' 
 
function write_(file,line)
   rc = write(file,line)
   return subwrd(rc,1)

From arlindo.dasilva at GMAIL.COM  Wed Nov  4 16:11:45 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Wed, 4 Nov 2009 16:11:45 -0500
Subject: Vector arrows for primary wave direction
In-Reply-To: <817a77c90911030815u14d4dae8lcbd3675f55489b8e@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.161145.0500.>

On Tue, Nov 3, 2009 at 11:15 AM, Nathan Cool <nathan at nathancool.com> wrote:

> Good morning everyone,
>
> I'm generating wave analysis models, but I'm having a tough time showing
> the mean-wave (or primary) wave direction arrows.
>
> The vars in the Grib are:
> -------------------------------------------------
> DIRPWsfc  0 107,1,1  ** surface Primary wave direction [deg]
> DIRSWsfc  0 109,1,1  ** surface Secondary wave direction [deg]
> HTSGWsfc  0 100,1,1  ** surface Sig height of wind waves and swell [m]
> PERPWsfc  0 108,1,1  ** surface Primary wave mean period [s]
> PERSWsfc  0 110,1,1  ** surface Secondary wave mean period [s]
> UGRDsfc  0 33,1,1  ** surface u wind [m/s]
> VGRDsfc  0 34,1,1  ** surface v wind [m/s]
> WDIRsfc  0 31,1,1  ** surface Wind direction [deg]
> WINDsfc  0 32,1,1  ** surface Wind speed [m/s]
> WVDIRsfc  0 101,1,1  ** surface Direction of wind waves [deg]
> WVPERsfc  0 103,1,1  ** surface Mean period of wind waves [s]
>
> For displaying wind vector arrows it's straightforward as there are U and V
> variables (UGRDsfc and VGRDsfc) for the zonal and meridional components.
> Displaying primary wave direction though seems more elusive, yet I see it
> done on many models such as the following:
> https://www.fnmoc.navy.mil/ww3_cgi/dynamic/ww3.w.npac.sig_wav_ht.000.gif
>
> ...which was generated using GrADS by FNMOC.
>
> Any help you can provide would be greatly appreciated, and thank you for
> your time.
>
>
Given the direction you should be able to construct a vector of magnitude 1
 pointing the direction of the wave, say

ga-> display cos(0.01745*WVDIRsfc);sin(0.01745*WVDIRsfc)

The factor 0.01745 is the conversion of deg to radians. (This assumes that
when the wave direction is 90 deg, the wave is going north).

   Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From bruyerec at UCAR.EDU  Wed Nov  4 16:35:08 2009
From: bruyerec at UCAR.EDU (Cindy Bruyere)
Date: Wed, 4 Nov 2009 14:35:08 -0700
Subject: missing values in wrf_output
In-Reply-To: <94ce49550911040618x290941bah877bcaeae755e57a@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.143508.0700.>

It is because these area are under ground for the pressure level you
are interpolating too.
In the latest version of ARWpost, there is a new option - extrapolate
- if set to true the code will extrapolate below ground, and these
blank spots in your plot will be filled in.
Cindy

On Nov 4, 2009, at 7:18 AM, sh zhou wrote:

> Hi All,
>
> when I display "relative humidity" from wrf_output, I found some
> values missing  ( please check the attachment), does it mean
> something wrong when generate those values? or I made some mistakes
> when converted wrf_output into Grads data format?( I use "ARWpost"
> to convert data), can you tell me how to fix it?
>
> Thank you.
>
> --
> Shenghui                    Student
> Major:                         Physics
> HuNan University          China
> <relative_humidity_value_missing.gif>


From shi at AGNES.GSFC.NASA.GOV  Wed Nov  4 17:06:39 2009
From: shi at AGNES.GSFC.NASA.GOV (Roger Shi)
Date: Wed, 4 Nov 2009 17:06:39 -0500
Subject: find the location of the max value over a lat-long domain
Message-ID: <WED.4.NOV.2009.170639.0500.>

Hi,

I am having problems to find the location of the max value over a
lat-long domain. GrADS only provides the "maxloc" function which only
loop through one dimension, e.g.

maxloc(expr, dim1, dim2 <,tinc>)

expr    - any valid GrADS expression
dim1    - the starting dimension expression
dim2    - the ending dimension expression
tinc    - optional time increment

Is there any way to loop through both x and y dimensions at the same time?

Best regards,
Roger Shi


From Charles.Seman at NOAA.GOV  Wed Nov  4 17:37:03 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Wed, 4 Nov 2009 17:37:03 -0500
Subject: find the location of the max value over a lat-long domain
In-Reply-To: <4AF1FAEF.6050705@agnes.gsfc.nasa.gov>
Message-ID: <WED.4.NOV.2009.173703.0500.>

Roger,

Here's a copy of part of an email reply posted to the Listserv by
Jennifer Adams (COLA) from Aug 2002 (which was saved to a local file for
reference):

---
Try this little bit of script code -- modify to suit your
data. This example draws a mark where the maximum of a
global variable called "air" is located in the xy plane.

'set warn off'
'd maxloc(max(air,lon=0,lon=360),lat=-90,lat=90)'
ygrd = subwrd(result,4)
'd maxloc(max(air,lat=-90,lat=90),lon=0,lon=360)'
xgrd = subwrd(result,4)
'set x 'xgrd
lonval = subwrd(result,4)
'set y 'ygrd
latval = subwrd(result,4)
'q w2xy 'lonval' 'latval
xpos = subwrd(result,3)
ypos = subwrd(result,6)
'draw mark 1 'xpos' 'ypos' .2'
---

Hope it helps,
Chuck

Roger Shi wrote:
> Hi,
>
> I am having problems to find the location of the max value over a
> lat-long domain. GrADS only provides the "maxloc" function which only
> loop through one dimension, e.g.
>
> maxloc(expr, dim1, dim2 <,tinc>)
>
> expr    - any valid GrADS expression
> dim1    - the starting dimension expression
> dim2    - the ending dimension expression
> tinc    - optional time increment
>
> Is there any way to loop through both x and y dimensions at the same
> time?
>
> Best regards,
> Roger Shi

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."


From h.meteo.shirazu at GMAIL.COM  Wed Nov  4 18:00:59 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Wed, 4 Nov 2009 17:00:59 -0600
Subject: open 2 files in grads
Message-ID: <WED.4.NOV.2009.170059.0600.>

Hi all user
I want to open 2 files in grads and display variables
can any one help me for errors shown below;

ga-> 'set dfile 2'
Default file set to: model_25.grb2
ga-> 'define r=rhprs'
  Warning issued for variable = rhprs
Define memory allocation size = 84680 bytes
Cannot contour grid - all undefined values

 and;

'set dfile 2'
 'Default file set to: model_25.grb2'
'ga-> 'd rhprs'
Data Request Error: Invalid grid coordinates
  World coordinates convert to non-integer  grid coordinates
    Variable = rhprs  Dimension = 2
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = rhprs

thanks
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From taranaphy at YAHOO.COM  Wed Nov  4 18:08:09 2009
From: taranaphy at YAHOO.COM (tarana mahzabin)
Date: Wed, 4 Nov 2009 15:08:09 -0800
Subject: find the location of the max value over a lat-long domain
In-Reply-To: <4AF1FAEF.6050705@agnes.gsfc.nasa.gov>
Message-ID: <WED.4.NOV.2009.150809.0800.>

Hi Roger,

I have attached a file which will provide you 3 text file for
Max value of the variable,corresponding  position of lat / lon  for a time varying loop.
May be this will help you.

 Tarana Mahzabin
Graduate Student,
Dept. of Earth and Atmospheric Science,
U of A, Edmonton, Canada.




________________________________
From: Roger Shi <shi at AGNES.GSFC.NASA.GOV>
To: GRADSUSR at LIST.CINECA.IT
Sent: Wednesday, November 4, 2009 15:06:39
Subject: find the location of the max value over a lat-long domain

Hi,

I am having problems to find the location of the max value over a
lat-long domain. GrADS only provides the "maxloc" function which only
loop through one dimension, e.g.

maxloc(expr, dim1, dim2 <,tinc>)

expr    - any valid GrADS expression
dim1    - the starting dimension expression
dim2    - the ending dimension expression
tinc    - optional time increment

Is there any way to loop through both x and y dimensions at the same time?

Best regards,
Roger Shi



      New Email names for you! 
Get the Email name you&#39;ve always wanted on the new @ymail and @rocketmail. 
Hurry before someone else does!
http://mail.promotions.yahoo.com/newdomains/aa/
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From Charles.Seman at NOAA.GOV  Wed Nov  4 18:15:07 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Wed, 4 Nov 2009 18:15:07 -0500
Subject: export data to a txt file
In-Reply-To: <5c658ce10911041309l789caebo547b6fd4ada3e85@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.181507.0500.>

Hossein,

Please find attached a "printascii.gs" script from Prince K. Xavier
<xavier at CAOS.IISC.ERNET.IN>

Hope it helps,
Chuck

hossein lotfi wrote:
> Hi All grads user
> I have a file contain vorticity variable,I want save It's data to
> a txt file
> I have fprintf.gs <http://fprintf.gs> script file to do this,but it
> can't save vorticity, latitude,longitude to one txt file.
> Any suggestion will be appreciated,
> thanks

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."

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From daxiawj at GMAIL.COM  Wed Nov  4 18:35:42 2009
From: daxiawj at GMAIL.COM (Daxiawj J)
Date: Wed, 4 Nov 2009 17:35:42 -0600
Subject: missing values in wrf_output
In-Reply-To: <94ce49550911040618x290941bah877bcaeae755e57a@mail.gmail.com>
Message-ID: <WED.4.NOV.2009.173542.0600.>

Have you checked the original data, or have you plotted the data using other method? 



From: sh zhou 
Sent: Wednesday, November 04, 2009 8:18 AM
To: GRADSUSR at LIST.CINECA.IT 
Subject: missing values in wrf_output


Hi All,

when I display "relative humidity" from wrf_output, I found some values missing  ( please check the attachment), does it mean something wrong when generate those values? or I made some mistakes when converted wrf_output into Grads data format?( I use "ARWpost" to convert data), can you tell me how to fix it?

Thank you.

-- 
Shenghui                    Student
Major:                         Physics
HuNan University          China
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From eric at OFFSHOREWEATHER.COM.AU  Wed Nov  4 18:43:44 2009
From: eric at OFFSHOREWEATHER.COM.AU (Eric Tiong)
Date: Thu, 5 Nov 2009 09:43:44 +1000
Subject: Reading binary files
Message-ID: <THU.5.NOV.2009.094344.1000.>

Hi,



How can I read binary files exported using wgrib (-binary switch) using
gfortran? Any specific compile switch/option required?



Thank you in advance.



Warm regards,

Eric Tiong

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From shi at AGNES.GSFC.NASA.GOV  Wed Nov  4 19:21:35 2009
From: shi at AGNES.GSFC.NASA.GOV (Jainn J. Shi (aka Roger))
Date: Wed, 4 Nov 2009 19:21:35 -0500
Subject: find the location of the max value over a lat-long domain
In-Reply-To: <4AF2020F.7090900@noaa.gov>
Message-ID: <WED.4.NOV.2009.192135.0500.>

Chuck,

Thanks a lot. This is exactly what I was looking for.

Roger

Charles Seman wrote:
> Roger,
>
> Here's a copy of part of an email reply posted to the Listserv by
> Jennifer Adams (COLA) from Aug 2002 (which was saved to a local file for
> reference):
>
> ---
> Try this little bit of script code -- modify to suit your
> data. This example draws a mark where the maximum of a
> global variable called "air" is located in the xy plane.
>
> 'set warn off'
> 'd maxloc(max(air,lon=0,lon=360),lat=-90,lat=90)'
> ygrd = subwrd(result,4)
> 'd maxloc(max(air,lat=-90,lat=90),lon=0,lon=360)'
> xgrd = subwrd(result,4)
> 'set x 'xgrd
> lonval = subwrd(result,4)
> 'set y 'ygrd
> latval = subwrd(result,4)
> 'q w2xy 'lonval' 'latval
> xpos = subwrd(result,3)
> ypos = subwrd(result,6)
> 'draw mark 1 'xpos' 'ypos' .2'
> ---
>
> Hope it helps,
> Chuck
>
> Roger Shi wrote:
>> Hi,
>>
>> I am having problems to find the location of the max value over a
>> lat-long domain. GrADS only provides the "maxloc" function which only
>> loop through one dimension, e.g.
>>
>> maxloc(expr, dim1, dim2 <,tinc>)
>>
>> expr    - any valid GrADS expression
>> dim1    - the starting dimension expression
>> dim2    - the ending dimension expression
>> tinc    - optional time increment
>>
>> Is there any way to loop through both x and y dimensions at the same
>> time?
>>
>> Best regards,
>> Roger Shi
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
> Charles Seman                                Charles.Seman at noaa.gov
> U.S. Department of Commerce / NOAA / OAR
> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
> 201 Forrestal Road                              fax: (609) 987-5063
> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."


--
================================================
Dr. Jainn Jong Shi (aka Roger)
Bldg 33 Rm C425
Code 613.1
NASA/Goddard Space Flight Center
Greenbelt, MD 20771
301-614-6078 (office) 301-614-5492 (fax)
email: shi at agnes.gsfc.nasa.gov
http://atmospheres.gsfc.nasa.gov/cloud_modeling


From h.meteo.shirazu at GMAIL.COM  Wed Nov  4 21:12:41 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Wed, 4 Nov 2009 20:12:41 -0600
Subject: export data to a txt file
In-Reply-To: <4AF20AFB.5010702@noaa.gov>
Message-ID: <WED.4.NOV.2009.201241.0600.>

On Wed, Nov 4, 2009 at 5:15 PM, Charles Seman <Charles.Seman at noaa.gov>wrote:

> Hossein,
>
> Please find attached a "printascii.gs" script from Prince K. Xavier
> <xavier at CAOS.IISC.ERNET.IN>
>
> Hope it helps,
> Chuck
>
> hossein lotfi wrote:
>
>> Hi All grads user
>> I have a file contain vorticity variable,I want save It's data to
>> a txt file
>> I have fprintf.gs <http://fprintf.gs> script file to do this,but it
>> can't save vorticity, latitude,longitude to one txt file.
>> Any suggestion will be appreciated,
>> thanks
>>
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
> Charles Seman                                Charles.Seman at noaa.gov
> U.S. Department of Commerce / NOAA / OAR
> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
> 201 Forrestal Road                              fax: (609) 987-5063
> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>
>
> * To generate ascii data from grads to use in applications like IGOR PRO
> *
> * Prince XAVIER (17 Nov 2004, LMD, Paris)
> *
> function printascii(args)
>
> if(args='')
> say ''
> say 'No arguments found.'
> say ''
> say 'Syntax is '
> say '----------------------------------'
> say 'printascii filename variable [z t]'
> say '----------------------------------'
> say ''
> say 'z(or Z) and t(or T) may be switched on in case of 3 or 4 dimension
> data.'
> say 'If not switched on, no information on level and time will be printed.'
> say ''
> say 'Examples:'
> say 'ga-> printascii rain.ascii rain'
> say 'ga-> printascii rain.ascii rain z'
> say 'ga-> printascii rain.ascii rain t'
> say 'ga-> printascii rain.ascii rain z t'
> say ''
> say ''
> return
> endif
>
> _fname = subwrd(args,1)
> _var = subwrd(args,2)
> arg3 = subwrd(args,3)
> arg4 = subwrd(args,4)
>
> say ''
>
> zflag = 0
> tflag = 0
> if(arg3=z|arg3=Z)
> say 'Level information requested.'
> zflag = 1
> endif
> if(arg3=t|arg3=T)
> say 'Time information requested.'
> tflag = 1
> endif
>
> if(arg4=z|arg4=Z)
> say 'Level information requested.'
> zflag = 1
> endif
> if(arg4=t|arg4=T)
> say 'Time information requested.'
> tflag = 1
> endif
>
>
> gxstat()
> *say _xs' '_xe' '_ys' '_ye' '_zs' '_ze' '_ts' '_te
> 'set x ' _xs' '_xe
> 'set y ' _ys' '_ye
> gxstat()
> if((_xe-_xs)=0)
> _lonint = 1
> else
> _lonint = (_lone-_lons)/(_xe-_xs)
> endif
> if((_ye-_ys)=0)
> _latint = 1
> else
> _latint = (_late-_lats)/(_ye-_ys)
> endif
> *say _lonint' '_latint
>
> _tint = 1
> _zint = 1
> _yint = 1
> _xint = 1
>
> _tt = 1
> while(_tt<=_te)
> 'set t '_tt
>
>  _zz = 1
>  while(_zz<=_ze)
>  'set z '_zz
>
>   _yy = 1
>   while(_yy<=_ye)
>   'set y '_yy
>
>    _xx = 1
>    while(_xx<=_xe)
>    'set x ' _xx
>    'd '_var
>    val = subwrd(result,4)
> *    say val
>     'query dims'
>      dum = sublin(result,2)
>      alon = subwrd(dum,6)
>      dum = sublin(result,3)
>      alat = subwrd(dum,6)
>      dum = sublin(result,4)
>      alev = subwrd(dum,6)
>      dum = sublin(result,5)
>      atim = subwrd(dum,6)
>
>
>
>       if (zflag = 1 & tflag = 1)
>        rc = write(_fname, atim' 'alev' 'alon' 'alat' 'val)
> *        say atim' 'alev' 'alon' 'alat' 'val
>       endif
>       if (zflag = 0 & tflag = 1)
>        rc = write(_fname, atim' 'alon' 'alat' 'val)
> *        say atim' 'alon' 'alat' 'val
>       endif
>       if (zflag = 1 & tflag = 0)
>        rc = write(_fname, alev' 'alon' 'alat' 'val)
> *        say alev' 'alon' 'alat' 'val
>        endif
>       if (zflag = 0 & tflag = 0)
>        rc = write(_fname, alon' 'alat' 'val)
> *        say alon' 'alat' 'val
>       endif
>
>    _xx = _xx + _xint
>    endwhile
>
>   _yy = _yy + _yint
>   endwhile
>
>  _zz = _zz + _zint
>  endwhile
>
> _tt = _tt + _tint
> endwhile
>
> say 'ASCII output written to '_fname'.'
> say ' '
> rc = close(_fname)
>
>
>
> return
>
>
> function gxstat()
> 'q dims'
> dinf = result
> lx = sublin(dinf,2)
> ly = sublin(dinf,3)
> lz = sublin(dinf,4)
> lt = sublin(dinf,5)
> if ( subwrd(lx,7) = 'to')
>  _lons = subwrd(lx,6)
>  _lone = subwrd(lx,8)
>  _xs = subwrd(lx,11)
>  _xe = subwrd(lx,13)
>  _xs = math_int(_xs)
>  _xe = math_int(_xe)
> else
>  _lons = subwrd(lx,6)
>  _lone = subwrd(lx,6)
>  _xs = subwrd(lx,9)
>  _xe = subwrd(lx,9)
>  _xs = math_int(_xs)
>  _xe = math_int(_xe)
> endif
> if ( subwrd(ly,7) = 'to')
>  _lats = subwrd(ly,6)
>  _late = subwrd(ly,8)
>  _ys = subwrd(ly,11)
>  _ye = subwrd(ly,13)
>  _ys = math_int(_ys)
>  _ye = math_int(_ye)
> else
>  _lats = subwrd(ly,6)
>  _late = subwrd(ly,6)
>  _ys = subwrd(ly,9)
>  _ye = subwrd(ly,9)
>  _ys = math_int(_ys)
>  _ye = math_int(_ye)
> endif
> if ( subwrd(lz,7) = 'to')
>  _levs = subwrd(lz,6)
>  _leve = subwrd(lz,8)
>  _zs = subwrd(lz,11)
>  _ze = subwrd(lz,13)
> else
>  _levs = subwrd(lz,6)
>  _leve = subwrd(lz,6)
>  _zs = subwrd(lz,9)
>  _ze = subwrd(lz,9)
> endif
> if ( subwrd(lt,7) = 'to')
>  _tims = subwrd(lt,6)
>  _time = subwrd(lt,8)
>  _ts = subwrd(lt,11)
>  _te = subwrd(lt,13)
> else
>  _tims = subwrd(lt,6)
>  _time = subwrd(lt,6)
>  _ts = subwrd(lt,9)
>  _te = subwrd(lt,9)
> endif
> return
>
>
Hi
thank you for your help
but can we change the command of printascii.gs file to write the  latitude,
longitude and other variable such below?
     lon  lon lon lon lon lon
  lat ps   ps  ps  ps  ps  ps
  lat ps   ps  ps  . . . . . . .
  lat . . . . . . . . . . . .
  lat
  thanks alot [?]
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From javier.p at EREDA.COM  Thu Nov  5 04:13:36 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Thu, 5 Nov 2009 10:13:36 +0100
Subject: how obtain the date from a NetCdf file
In-Reply-To: <A2256DE1-64AD-41CB-B3B8-E4C6EF254351@eci.ox.ac.uk>
Message-ID: <THU.5.NOV.2009.101336.0100.>

Thank you very much Matthias:

It works!
I have another question . I wish if I get several variables, these appear in
columns in the text file. Is this possible?
I mean, I'd like a file.txt in which appears something similar to:

   Fecha                   u             v              temp         hgt
00Z01JUN2009   -1.9065     0.225504     288.06        9385.06
12Z01JUN2009   1.02317    -1.33784      295.778      9385.06
00Z02JUN2009   -1.15094   -3.90728      290.077      9385.06
12Z02JUN2009   -0.65753  -1.19813       295.153      9385.06
Thanks. Best  Regards:

Javier Pe?a

2009/11/4 Matthias Fripp <matthias.fripp at eci.ox.ac.uk>

> you could use something like this:
>
>  'q time'
> datetime = subwrd(result, 3)
>
> That will give you the date and time in grads format, e.g.,
> "00Z01JAN1979". If you want, you could go further, with something like this:
>
>  formatted_time = substr(datetime, 9, 4) '/' substr(datetime, 6, 3) '/'
> substr(datetime, 4, 2) ' ' substr(datetime, 1, 2) ':00'
> say "formatted time: " formatted_time
>
> Unfortunately, I don't know any way to convert "JAN" to "01" within grads.
> So you may need to use awk (or similar) to convert the dates after-the-fact,
> in which case you might as well just write the datetime directly to the
> file, and then convert that later.
>
> Matthias
>
>   On Nov 4, 2009, at 4:26 PM, Javier Pe?a wrote:
>
>  Hello everyone,
>
> I have a netcdf file from which I can obtain any of the variables with the
> following script (for example to get u wind component):
>
> * takes the values of the component or in a column
> 'reinit'
> 'sdfopen prueba.nc'
> 'set lat 41'
> 'set lon 359'
> 'set lev 1'
> to = 1
> * Write the variable to a file
> * 'set gxout vector'
> * 'set fwrite z: \ dummy.dat'
> while (to <5)
> 'set t' to
> tmp =''
> tmp = subwrd (rerult, 4)
> 'd u', tmp = tmp%''subwrd (result, 4)
> rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt', tmp)
> to = to + 1
> endwhile
>
> but my question is, can I get the date which belongs each variable value?
> That is, if I have values for the velocity component u: 2.3, 3.4, 5.6, 3.9,
> can I get a. txt what next?
>
> Date                         U (m / s)
> 2009/12/06 00:00          2.3
> 2009/12/06 06:00          3.4
> 2009/12/06 18:00          5.6
> 2009/12/07 00:00          3.9
>
> Thank you very much. Best regards.
>
> Javier Pe?a
>
>
>


-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From javier.p at EREDA.COM  Thu Nov  5 04:19:40 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Thu, 5 Nov 2009 10:19:40 +0100
Subject: =?ISO-8859-1?Q?Re=3A_Obtenci=F3n_de_varias_variables_de_un_=2Egrib?=
In-Reply-To: <90b4c41ee4e465f544f78f1ac928872f.squirrel@webmail.udec.cl>
Message-ID: <THU.5.NOV.2009.101940.0100.>

Hola Cristian:

Gracias por la informaci?n. Efectivamente buscando en google lo que me has
mencionado, encuentro la funci?n grib2ctl.pl con la que puedo crear un
archivo .ctl que ya grad puede leer. El problema es que en la p?gina comenta
que esta funci?n grib2ctl.pl s?lamente funciona bajo unix/linux y, yo estoy
trabajando con windows XP. ?Existe alguna manera sencilla de poder leer los
grib trabajando con el sistema operativo windows XP?
Un saludo:

Javier Pe?a.


El 4 de noviembre de 2009 20:43, Cristian Gonzal Mu?oz Castillo <
cmunozc at udec.cl> escribi?:

> Hola Javier,
>
> Generalmente los archivos debes leerlos a traves de un archivo de control
> (uno con extension .ctl) que haga referencia al archivo .grib que
> utilizas. Googlea "grads control file" y de seguro encontraras lo que
> andas buscando.
>
> Saludos
>
> > Hola a todos:
> >
> > Estoy trabajando con Pcgrads en el sistema operativo windows xp. Tengo un
> > archivo .grib que contiene varias variables en un cierto rango de
> latitud,
> > longitud para un periodo de tiempo de 20 a?os, con datos cada 6 horas.
> > Mi pregunta es la siguiente ?como puedo leer este archivo con Pcgrads?
> > Un saludo:
> > Javier Pe?a
> >
> > --
> > Javier Pe?a ?lvarez
> > Energ?as Renovables
> > javier.p at ereda.com
> > EREDA
> >
> >                            Tel:  +34 91 5014755
> >                            Fax: +34 91 5014756
> >                  c/ T?llez 26, 28007 MADRID
> >                                    www.ereda.com
> >
>
>
> --
> Cristian G. Mu?oz Castillo
> Geof?sico
> Licenciado en Ciencias F?sicas
> Oficina 442
> Depto. Geof?sica (DGEO)
> Fono (41) 2203155
> Facultad Ciencias F?sicas y Matem?ticas
> Universidad de Concepci?n
> Concepci?n
> Chile
>



-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From matthias.fripp at ECI.OX.AC.UK  Thu Nov  5 06:55:13 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Thu, 5 Nov 2009 11:55:13 +0000
Subject: how obtain the date from a NetCdf file
In-Reply-To: <607bb2140911050113s36d8ccb7tf6b49f07dc58f082@mail.gmail.com>
Message-ID: <THU.5.NOV.2009.115513.0000.>

Hi Javier,

To write out multiple columns of data, you would use something like  
this:

*write a header in the file
fname="output_file.csv"
rc = write(fname,"date,u,v,temp,hgt")
if (rc != 0)
   say "Error writing to file " fname
   return
endif

*find the time range set by the user
*you may need to adjust this depending on your version of grads
'query dims'
tmin = subwrd(result, 51)
tmax = subwrd(result, 53)

*loop through all times, writing out data
timestep = tmin
while timestep <= tmax
   'set t ' timestep
   'q time'
   datetime = subwrd(result, 3)

* get the data for this time step
* note: change all the "?_var" variables to match whatever is in your  
grib file

   'd u_var'
   u = subwrd(result,4)
   u = math_format('%6.6f',val)

   'd v_var'
   v = subwrd(result,4)
   v = math_format('%6.6f',val)

   'd temp_var'
   temp = subwrd(result,4)
   temp = math_format('%6.6f',val)

   'd hgt_var'
   hgt = subwrd(result,4)
   hgt = math_format('%6.6f',val)

* compose a line of text and write it to the output file
   outstr = datetime ',' u ',' v ',' temp ',' hgt
   rc = write(fname,outstr,append)
   if (rc != 0)
     say "Error writing to file " fname
     break
   endif
   timestep = timestep + 1
endwhile
close(fname)
'set t ' tmin ' ' tmax

This script assumes you have previously selected a range of times with  
"set time" or "set t", and a single point with set lat, set lon, set  
x, set y, set z, etc. It can be extended pretty easily to loop across  
a range of x-y-z values if you want to do that instead.

If you are working with remote data (e.g., in gradsdods), it will  
probably be much faster if you use the "define" statement to read in  
large chunks of data at once, and then loop through them locally.

This creates a text file with commas between the values. I'm sure  
there's some way to specify tabs instead, but I'm not sure how.

I hope that helps.

Matthias

On Nov 5, 2009, at 9:13 AM, Javier Pe?a wrote:

> Thank you very much Matthias:
>
> It works!
> I have another question . I wish if I get several variables, these  
> appear in columns in the text file. Is this possible?
> I mean, I'd like a file.txt in which appears something similar to:
>
>    Fecha                   u             v              temp          
> hgt
> 00Z01JUN2009   -1.9065     0.225504     288.06        9385.06
> 12Z01JUN2009   1.02317    -1.33784      295.778      9385.06
> 00Z02JUN2009   -1.15094   -3.90728      290.077      9385.06
> 12Z02JUN2009   -0.65753  -1.19813       295.153      9385.06
> Thanks. Best  Regards:
>
> Javier Pe?a
>
> 2009/11/4 Matthias Fripp <matthias.fripp at eci.ox.ac.uk>
> you could use something like this:
>
> 'q time'
> datetime = subwrd(result, 3)
>
> That will give you the date and time in grads format, e.g.,  
> "00Z01JAN1979". If you want, you could go further, with something  
> like this:
>
> formatted_time = substr(datetime, 9, 4) '/' substr(datetime, 6, 3)  
> '/' substr(datetime, 4, 2) ' ' substr(datetime, 1, 2) ':00'
> say "formatted time: " formatted_time
>
> Unfortunately, I don't know any way to convert "JAN" to "01" within  
> grads. So you may need to use awk (or similar) to convert the dates  
> after-the-fact, in which case you might as well just write the  
> datetime directly to the file, and then convert that later.
>
> Matthias
>
> On Nov 4, 2009, at 4:26 PM, Javier Pe?a wrote:
>
>> Hello everyone,
>>
>> I have a netcdf file from which I can obtain any of the variables  
>> with the following script (for example to get u wind component):
>>
>> * takes the values of the component or in a column
>> 'reinit'
>> 'sdfopen prueba.nc'
>> 'set lat 41'
>> 'set lon 359'
>> 'set lev 1'
>> to = 1
>> * Write the variable to a file
>> * 'set gxout vector'
>> * 'set fwrite z: \ dummy.dat'
>> while (to <5)
>> 'set t' to
>> tmp =''
>> tmp = subwrd (rerult, 4)
>> 'd u', tmp = tmp%''subwrd (result, 4)
>> rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt',  
>> tmp)
>> to = to + 1
>> endwhile
>>
>> but my question is, can I get the date which belongs each variable  
>> value? That is, if I have values for the velocity component u: 2.3,  
>> 3.4, 5.6, 3.9, can I get a. txt what next?
>>
>> Date                         U (m / s)
>> 2009/12/06 00:00          2.3
>> 2009/12/06 06:00          3.4
>> 2009/12/06 18:00          5.6
>> 2009/12/07 00:00          3.9
>>
>> Thank you very much. Best regards.
>>
>> Javier Pe?a
>
>
>
>
> -- 
> Javier Pe?a ?lvarez
> Energ?as Renovables
> javier.p at ereda.com
> EREDA
>
>                            Tel:  +34 91 5014755
>                            Fax: +34 91 5014756
>                  c/ T?llez 26, 28007 MADRID
>                                    www.ereda.com

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From matthias.fripp at ECI.OX.AC.UK  Thu Nov  5 07:09:01 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Thu, 5 Nov 2009 12:09:01 +0000
Subject: how obtain the date from a NetCdf file
In-Reply-To: <607bb2140911050113s36d8ccb7tf6b49f07dc58f082@mail.gmail.com>
Message-ID: <THU.5.NOV.2009.120901.0000.>

Sorry, I just noticed an error in how I formatted the numbers in my  
earlier reply. A corrected version of the script is below...

-Matthias

====== revised message ===========

To write out multiple columns of data, you would use something like  
this:

*write a header in the file
fname="output_file.csv"
rc = write(fname,"date,u,v,temp,hgt")
if (rc != 0)
   say "Error writing to file " fname
   return
endif

*find the time range set by the user
*you may need to adjust this depending on your version of grads
'query dims'
tmin = subwrd(result, 51)
tmax = subwrd(result, 53)

*loop through all times, writing out data
timestep = tmin
while timestep <= tmax
   'set t ' timestep
   'q time'
   datetime = subwrd(result, 3)

* get the data for this time step
* note: change all the "?_var" variables to match whatever is in your  
grib file

   'd u_var'
   u = subwrd(result,4)

   'd v_var'
   v = subwrd(result,4)

   'd temp_var'
   temp = subwrd(result,4)

   'd hgt_var'
   hgt = subwrd(result,4)

* compose a line of text and write it to the output file
   outstr = datetime ',' u ',' v ',' temp ',' hgt
   rc = write(fname,outstr,append)
   if (rc != 0)
     say "Error writing to file " fname
     break
   endif
   timestep = timestep + 1
endwhile
close(fname)
'set t ' tmin ' ' tmax

This script assumes you have previously selected a range of times with  
"set time" or "set t", and a single point with set lat, set lon, set  
x, set y, set z, etc. It can be extended pretty easily to loop across  
a range of x-y-z values if you want to do that instead.

If you are working with remote data (e.g., in gradsdods), it will  
probably be much faster if you use the "define" statement to read in  
large chunks of data at once, and then loop through them locally. In  
that case, you may also want to use 'q defval' to read numeric values  
directly from the defined variable into your script variables, and  
then use math_format() to convert the numeric values to text before  
composing the output string.

This creates a text file with commas between the values. I'm sure  
there's some way to specify tabs instead, but I'm not sure how.

I hope that helps.

Matthias

On Nov 5, 2009, at 9:13 AM, Javier Pe?a wrote:

> Thank you very much Matthias:
>
> It works!
> I have another question . I wish if I get several variables, these  
> appear in columns in the text file. Is this possible?
> I mean, I'd like a file.txt in which appears something similar to:
>
>    Fecha                   u             v              temp          
> hgt
> 00Z01JUN2009   -1.9065     0.225504     288.06        9385.06
> 12Z01JUN2009   1.02317    -1.33784      295.778      9385.06
> 00Z02JUN2009   -1.15094   -3.90728      290.077      9385.06
> 12Z02JUN2009   -0.65753  -1.19813       295.153      9385.06
> Thanks. Best  Regards:
>
> Javier Pe?a
>
> 2009/11/4 Matthias Fripp <matthias.fripp at eci.ox.ac.uk>
> you could use something like this:
>
> 'q time'
> datetime = subwrd(result, 3)
>
> That will give you the date and time in grads format, e.g.,  
> "00Z01JAN1979". If you want, you could go further, with something  
> like this:
>
> formatted_time = substr(datetime, 9, 4) '/' substr(datetime, 6, 3)  
> '/' substr(datetime, 4, 2) ' ' substr(datetime, 1, 2) ':00'
> say "formatted time: " formatted_time
>
> Unfortunately, I don't know any way to convert "JAN" to "01" within  
> grads. So you may need to use awk (or similar) to convert the dates  
> after-the-fact, in which case you might as well just write the  
> datetime directly to the file, and then convert that later.
>
> Matthias
>
> On Nov 4, 2009, at 4:26 PM, Javier Pe?a wrote:
>
>> Hello everyone,
>>
>> I have a netcdf file from which I can obtain any of the variables  
>> with the following script (for example to get u wind component):
>>
>> * takes the values of the component or in a column
>> 'reinit'
>> 'sdfopen prueba.nc'
>> 'set lat 41'
>> 'set lon 359'
>> 'set lev 1'
>> to = 1
>> * Write the variable to a file
>> * 'set gxout vector'
>> * 'set fwrite z: \ dummy.dat'
>> while (to <5)
>> 'set t' to
>> tmp =''
>> tmp = subwrd (rerult, 4)
>> 'd u', tmp = tmp%''subwrd (result, 4)
>> rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt',  
>> tmp)
>> to = to + 1
>> endwhile
>>
>> but my question is, can I get the date which belongs each variable  
>> value? That is, if I have values for the velocity component u: 2.3,  
>> 3.4, 5.6, 3.9, can I get a. txt what next?
>>
>> Date                         U (m / s)
>> 2009/12/06 00:00          2.3
>> 2009/12/06 06:00          3.4
>> 2009/12/06 18:00          5.6
>> 2009/12/07 00:00          3.9
>>
>> Thank you very much. Best regards.
>>
>> Javier Pe?a
>
>
>
>
> -- 
> Javier Pe?a ?lvarez
> Energ?as Renovables
> javier.p at ereda.com
> EREDA
>
>                            Tel:  +34 91 5014755
>                            Fax: +34 91 5014756
>                  c/ T?llez 26, 28007 MADRID
>                                    www.ereda.com

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From elisasiq at USP.BR  Thu Nov  5 13:54:46 2009
From: elisasiq at USP.BR (MARIA ELISA SIQUEIRA SILVA)
Date: Thu, 5 Nov 2009 16:54:46 -0200
Subject: time axis label
Message-ID: <THU.5.NOV.2009.165446.0200.>

Dear ones,

does anybody know how can I put labels on the x-axis according to
sequential month and years, like OCT2001 NOV2001 ..., until, MAR2002 ?


thanks
Elisa




--
Maria Elisa Siqueira Silva
Laborat?rio de Climatologia e Biogeografia - LCB
Depto Geografia - FFLCH - USP
Av. Prof. Lineu Prestes, 338 - Cidade Universit?ria
S?o Paulo - SP
05508-900
(11) 3091-3769


From Charles.Seman at NOAA.GOV  Thu Nov  5 13:55:10 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Thu, 5 Nov 2009 13:55:10 -0500
Subject: export data to a txt file
In-Reply-To: <5c658ce10911041812rae4150bjd939d5e8f1af8493@mail.gmail.com>
Message-ID: <THU.5.NOV.2009.135510.0500.>

Hossein,

Please find attached "printasciigrid.gs" from Stefan Fronzek
<sfronzek at SONNENKINDER.ORG>... don't know if this will help... and I'll
also forward an email of his containing a newer version (look for an
email "Re: GrADS to Ascii with header" on the Listserv)...

Hope this helps,
Chuck

hossein lotfi wrote:
>
>
> On Wed, Nov 4, 2009 at 5:15 PM, Charles Seman <Charles.Seman at noaa.gov
> <mailto:Charles.Seman at noaa.gov>> wrote:
>
>     Hossein,
>
>     Please find attached a "printascii.gs <http://printascii.gs/>"
>     script from Prince K. Xavier
>     <xavier at CAOS.IISC.ERNET.IN <mailto:xavier at CAOS.IISC.ERNET.IN>>
>
>     Hope it helps,
>     Chuck
>
>     hossein lotfi wrote:
>
>         Hi All grads user
>         I have a file contain vorticity variable,I want save It's data to
>         a txt file
>         I have fprintf.gs <http://fprintf.gs/> <http://fprintf.gs
>         <http://fprintf.gs/>> script file to do this,but it
>         can't save vorticity, latitude,longitude to one txt file.
>         Any suggestion will be appreciated,
>         thanks
>
>
>     --
>
>     Please note that Charles.Seman at noaa.gov
>     <mailto:Charles.Seman at noaa.gov> should be considered my NOAA
>     email address, not cjs at gfdl.noaa.gov <mailto:cjs at gfdl.noaa.gov>.
>
>     ********************************************************************
>     Charles Seman
>      Charles.Seman at noaa.gov <mailto:Charles.Seman at noaa.gov>
>     U.S. Department of Commerce / NOAA / OAR
>     Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>     201 Forrestal Road                              fax: (609) 987-5063
>     Princeton, NJ  08540-6649
>      http://www.gfdl.noaa.gov/~cjs/ <http://www.gfdl.noaa.gov/%7Ecjs/>
>     ********************************************************************
>
>     "The contents of this message are mine personally and do not
>     necessarily
>     reflect any position of the Government or NOAA."
>
>
>     * To generate ascii data from grads to use in applications like
>     IGOR PRO
>     *
>     * Prince XAVIER (17 Nov 2004, LMD, Paris)
>     *
>     function printascii(args)
>
>     if(args='')
>     say ''
>     say 'No arguments found.'
>     say ''
>     say 'Syntax is '
>     say '----------------------------------'
>     say 'printascii filename variable [z t]'
>     say '----------------------------------'
>     say ''
>     say 'z(or Z) and t(or T) may be switched on in case of 3 or 4
>     dimension data.'
>     say 'If not switched on, no information on level and time will be
>     printed.'
>     say ''
>     say 'Examples:'
>     say 'ga-> printascii rain.ascii rain'
>     say 'ga-> printascii rain.ascii rain z'
>     say 'ga-> printascii rain.ascii rain t'
>     say 'ga-> printascii rain.ascii rain z t'
>     say ''
>     say ''
>     return
>     endif
>
>     _fname = subwrd(args,1)
>     _var = subwrd(args,2)
>     arg3 = subwrd(args,3)
>     arg4 = subwrd(args,4)
>
>     say ''
>
>     zflag = 0
>     tflag = 0
>     if(arg3=z|arg3=Z)
>     say 'Level information requested.'
>     zflag = 1
>     endif
>     if(arg3=t|arg3=T)
>     say 'Time information requested.'
>     tflag = 1
>     endif
>
>     if(arg4=z|arg4=Z)
>     say 'Level information requested.'
>     zflag = 1
>     endif
>     if(arg4=t|arg4=T)
>     say 'Time information requested.'
>     tflag = 1
>     endif
>
>
>     gxstat()
>     *say _xs' '_xe' '_ys' '_ye' '_zs' '_ze' '_ts' '_te
>     'set x ' _xs' '_xe
>     'set y ' _ys' '_ye
>     gxstat()
>     if((_xe-_xs)=0)
>     _lonint = 1
>     else
>     _lonint = (_lone-_lons)/(_xe-_xs)
>     endif
>     if((_ye-_ys)=0)
>     _latint = 1
>     else
>     _latint = (_late-_lats)/(_ye-_ys)
>     endif
>     *say _lonint' '_latint
>
>     _tint = 1
>     _zint = 1
>     _yint = 1
>     _xint = 1
>
>     _tt = 1
>     while(_tt<=_te)
>     'set t '_tt
>
>      _zz = 1
>      while(_zz<=_ze)
>      'set z '_zz
>
>       _yy = 1
>       while(_yy<=_ye)
>       'set y '_yy
>
>        _xx = 1
>        while(_xx<=_xe)
>        'set x ' _xx
>        'd '_var
>        val = subwrd(result,4)
>     *    say val
>         'query dims'
>          dum = sublin(result,2)
>          alon = subwrd(dum,6)
>          dum = sublin(result,3)
>          alat = subwrd(dum,6)
>          dum = sublin(result,4)
>          alev = subwrd(dum,6)
>          dum = sublin(result,5)
>          atim = subwrd(dum,6)
>
>
>
>           if (zflag = 1 & tflag = 1)
>            rc = write(_fname, atim' 'alev' 'alon' 'alat' 'val)
>     *        say atim' 'alev' 'alon' 'alat' 'val
>           endif
>           if (zflag = 0 & tflag = 1)
>            rc = write(_fname, atim' 'alon' 'alat' 'val)
>     *        say atim' 'alon' 'alat' 'val
>           endif
>           if (zflag = 1 & tflag = 0)
>            rc = write(_fname, alev' 'alon' 'alat' 'val)
>     *        say alev' 'alon' 'alat' 'val
>            endif
>           if (zflag = 0 & tflag = 0)
>            rc = write(_fname, alon' 'alat' 'val)
>     *        say alon' 'alat' 'val
>           endif
>
>        _xx = _xx + _xint
>        endwhile
>
>       _yy = _yy + _yint
>       endwhile
>
>      _zz = _zz + _zint
>      endwhile
>
>     _tt = _tt + _tint
>     endwhile
>
>     say 'ASCII output written to '_fname'.'
>     say ' '
>     rc = close(_fname)
>
>
>
>     return
>
>
>     function gxstat()
>     'q dims'
>     dinf = result
>     lx = sublin(dinf,2)
>     ly = sublin(dinf,3)
>     lz = sublin(dinf,4)
>     lt = sublin(dinf,5)
>     if ( subwrd(lx,7) = 'to')
>      _lons = subwrd(lx,6)
>      _lone = subwrd(lx,8)
>      _xs = subwrd(lx,11)
>      _xe = subwrd(lx,13)
>      _xs = math_int(_xs)
>      _xe = math_int(_xe)
>     else
>      _lons = subwrd(lx,6)
>      _lone = subwrd(lx,6)
>      _xs = subwrd(lx,9)
>      _xe = subwrd(lx,9)
>      _xs = math_int(_xs)
>      _xe = math_int(_xe)
>     endif
>     if ( subwrd(ly,7) = 'to')
>      _lats = subwrd(ly,6)
>      _late = subwrd(ly,8)
>      _ys = subwrd(ly,11)
>      _ye = subwrd(ly,13)
>      _ys = math_int(_ys)
>      _ye = math_int(_ye)
>     else
>      _lats = subwrd(ly,6)
>      _late = subwrd(ly,6)
>      _ys = subwrd(ly,9)
>      _ye = subwrd(ly,9)
>      _ys = math_int(_ys)
>      _ye = math_int(_ye)
>     endif
>     if ( subwrd(lz,7) = 'to')
>      _levs = subwrd(lz,6)
>      _leve = subwrd(lz,8)
>      _zs = subwrd(lz,11)
>      _ze = subwrd(lz,13)
>     else
>      _levs = subwrd(lz,6)
>      _leve = subwrd(lz,6)
>      _zs = subwrd(lz,9)
>      _ze = subwrd(lz,9)
>     endif
>     if ( subwrd(lt,7) = 'to')
>      _tims = subwrd(lt,6)
>      _time = subwrd(lt,8)
>      _ts = subwrd(lt,11)
>      _te = subwrd(lt,13)
>     else
>      _tims = subwrd(lt,6)
>      _time = subwrd(lt,6)
>      _ts = subwrd(lt,9)
>      _te = subwrd(lt,9)
>     endif
>     return
>
>
> Hi
> thank you for your help
> but can we change the command of printascii.gs
> <http://printascii.gs> file to write the  latitude, longitude
> and other variable such below?
>      lon  lon lon lon lon lon
>   lat ps   ps  ps  ps  ps  ps
>   lat ps   ps  ps  . . . . . . .
>   lat . . . . . . . . . . . .
>   lat
>   thanks alot
>
>
>

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."

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From liuzf406 at 126.COM  Thu Nov  5 13:55:07 2009
From: liuzf406 at 126.COM (liuzf406)
Date: Fri, 6 Nov 2009 02:55:07 +0800
Subject: Ask for help
Message-ID: <FRI.6.NOV.2009.025507.0800.>

Good afternoon everyone,

I need to calculate the moisture flux and the moisture divergence of 1992 summer over the continental United States. The gs file I wrote is as following, but I am not sure if it is right, so anyone can look at this file and give me some comments? In addition, attached are the calculated result using this file.
 
Best,
Zhongfang
 
The gs file are:
-------------------------------------------------
'reinit'
'set grid off'
'set grads off'
'set poli on'
'set parea 1 10 1 8'
'sdfopen shum.mon.mean.nc'  
'sdfopen uwnd.mon.mean.nc' 
'sdfopen vwnd.mon.mean.nc'
'sdfopen pres.mon.mean.nc'
'enable print sum_1992.gmf'
'set lat 24.99 50.1'
'set xlint 10'
'set lon -130.01 -69.99'
'set ylint 10'
'set cint 20'
'set t 1 600'
'set font 0'
'set ccols 9 14 4 11 5 13 3 10 7 12 8 2 6'
'set mpdset cnworld mres'
'set map 1 1 1'
'draw map'
'set gxout shaded'
'set ylopts 1 4 0.18'
'set xlopts 1 4 0.18'
'set cthick 5'
'define m=shum.1*uwnd.2'
'define n=shum.1*vwnd.3'
'define qu=vint(pres.4(z=1),m,700)/1000'
'define qusum=ave(qu,t=534,t=536)'
'define qv=vint(pres.4(z=1),n,700)/1000'
'define qvsum=ave(qv,t=534,t=536)'
'set t 6'
'set gxout shaded'
'd qusum;qvsum'
'd hdivg(qusum,qvsum)'
'set gxout vector'
'set ccolor 1'
'run cbar'
'd qusum;qvsum'
*'set cint 20'
'draw string 1.9 7 Moisture transport'
'draw string 9.5 7 JJA-1992'
'print'
'disable print'
-------------------------------------------------


Any help you can provide would be greatly appreciated, and thank you for your time.







09???3D??????????????????


"??"??????3D???????????????
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From arlindo.dasilva at GMAIL.COM  Thu Nov  5 14:39:21 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Thu, 5 Nov 2009 14:39:21 -0500
Subject: starting pygrads
In-Reply-To: <1FA9A5649C33644B85AE596DBAF16D7C01AB64BC@scomp0040.wurnet.nl>
Message-ID: <THU.5.NOV.2009.143921.0500.>

On Wed, Nov 4, 2009 at 11:52 PM, Maat, Herbert ter
<Herbert.termaat at wur.nl>wrote:

>  Hello,
>
> I was wondering if a solution has been found for the problem stated in the
> attached e-mail. Today I have tried to play around with PyGrADS and GrADS
> (2.0 a5 oga 5) on Windows, but while I tried to run the examples it appears
> that the program freezes.
>
>

In principle it all should work, but I have not tried it myself recently on
Windows. I run it all the time on my Mac. I'll have to give it a try myself.
However, I need more details:

1) Which version of python for windows? Did you install my pygrads superpack
or you installed python by yourself? If so, which version?

2) Which version of pygrads?

3) When you open a DOS windows (cmd.exe) and you type

C:\> grads

does it start? You must have grads on your path for pygrads to work.

4) Start python and type

import grads
import grads.gacore
import grads.ganum
import grads.galab

Any error?

5) Instantiate a grads object by hand

ga = grads.GrADS(Bin='/path/to/grads')

Does it work?

   Arlindo












--
Arlindo da Silva
dasilva at alum.mit.edu
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From azarzarrin at YAHOO.COM  Thu Nov  5 14:46:53 2009
From: azarzarrin at YAHOO.COM (Azar Zarrin)
Date: Thu, 5 Nov 2009 11:46:53 -0800
Subject: time axis label
In-Reply-To: <20091105165446.cdrjnqeg3wokwggs@webmail.usp.br>
Message-ID: <THU.5.NOV.2009.114653.0800.>

Hi

set xlab option
gives a C-language template for conversion of the label value to a string 

Azar

--- On Thu, 11/5/09, MARIA ELISA SIQUEIRA SILVA <elisasiq at USP.BR> wrote:

From: MARIA ELISA SIQUEIRA SILVA <elisasiq at USP.BR>
Subject: time axis label
To: GRADSUSR at LIST.CINECA.IT
Date: Thursday, November 5, 2009, 9:54 PM

Dear ones,

does anybody know how can I put labels on the x-axis according to
sequential month and years, like OCT2001 NOV2001 ..., until, MAR2002 ?


thanks
Elisa




--
Maria Elisa Siqueira Silva
Laborat?rio de Climatologia e Biogeografia - LCB
Depto Geografia - FFLCH - USP
Av. Prof. Lineu Prestes, 338 - Cidade Universit?ria
S?o Paulo - SP
05508-900
(11) 3091-3769



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From greg at GREGPERKINS.COM  Thu Nov  5 19:09:28 2009
From: greg at GREGPERKINS.COM (Greg Perkins)
Date: Thu, 5 Nov 2009 18:09:28 -0600
Subject: unsubscribe
In-Reply-To: <607bb2140911050113s36d8ccb7tf6b49f07dc58f082@mail.gmail.com>
Message-ID: <THU.5.NOV.2009.180928.0600.>


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From hhe at ATMOS.UMD.EDU  Thu Nov  5 21:03:10 2009
From: hhe at ATMOS.UMD.EDU (Hao He)
Date: Thu, 5 Nov 2009 21:03:10 -0500
Subject: how to write a ASCII file by GrADS
Message-ID: <THU.5.NOV.2009.210310.0500.>

Hi,
    I used GrADS to read the GRIB file and wanted to selected some
variables, which can be write to an ASCII (.txt or .dat) file. I read the
manual and found I should use 'gxout fwrite'. But I still could not
figure out how to write the script. Does anyone have an idea?

Thanks!

Hao


From zjuyanlibin at 163.COM  Thu Nov  5 21:19:55 2009
From: zjuyanlibin at 163.COM (Yan Libin)
Date: Fri, 6 Nov 2009 10:19:55 +0800
Subject: how to write a ASCII file by GrADS
Message-ID: <FRI.6.NOV.2009.101955.0800.>

'set gxout fwrite' is used to output binary files, not for ascii files.
so you can use 'set gxout print'
or
1 set gxout fwrite
2 use fortran to read this binary file


2009-11-06 



Yan Libin 



???? Hao He 
????? 2009-11-06  10:04:01 
???? GRADSUSR 
??? 
??? how to write a ASCII file by GrADS 
 
Hi,
    I used GrADS to read the GRIB file and wanted to selected some
variables, which can be write to an ASCII (.txt or .dat) file. I read the
manual and found I should use 'gxout fwrite'. But I still could not
figure out how to write the script. Does anyone have an idea?
Thanks!
Hao
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From eric192 at 163.COM  Thu Nov  5 22:29:33 2009
From: eric192 at 163.COM (lifei)
Date: Fri, 6 Nov 2009 11:29:33 +0800
Subject: unsubscribe
Message-ID: <FRI.6.NOV.2009.112933.0800.>


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From javier.p at EREDA.COM  Fri Nov  6 03:06:23 2009
From: javier.p at EREDA.COM (=?ISO-8859-1?Q?Javier_Pe=F1a?=)
Date: Fri, 6 Nov 2009 09:06:23 +0100
Subject: how obtain the date from a NetCdf file
In-Reply-To: <70CA6D44-CE88-4595-BCCD-4DB4BA70B47B@eci.ox.ac.uk>
Message-ID: <FRI.6.NOV.2009.090623.0100.>

Hi Matthias:

Thank you very much for your help ! I've gotten it

Best Regards:

Javier Pe?a

2009/11/5 Matthias Fripp <matthias.fripp at eci.ox.ac.uk>

>  Sorry, I just noticed an error in how I formatted the numbers in my
> earlier reply. A corrected version of the script is below...
>
> -Matthias
>
> ====== revised message ===========
>
> To write out multiple columns of data, you would use something like this:
>
>  *write a header in the file
> fname="output_file.csv"
> rc = write(fname,"date,u,v,temp,hgt")
>  if (rc != 0)
>   say "Error writing to file " fname
>   return
> endif
>
> *find the time range set by the user
>  *you may need to adjust this depending on your version of grads
> 'query dims'
>  tmin = subwrd(result, 51)
> tmax = subwrd(result, 53)
>
>  *loop through all times, writing out data
> timestep = tmin
> while timestep <= tmax
>   'set t ' timestep
>    'q time'
>   datetime = subwrd(result, 3)
>
>  * get the data for this time step
>  * note: change all the "?_var" variables to match whatever is in your
> grib file
>
>   'd u_var'
>   u = subwrd(result,4)
>
>    'd v_var'
>   v = subwrd(result,4)
>
>    'd temp_var'
>   temp = subwrd(result,4)
>
>    'd hgt_var'
>   hgt = subwrd(result,4)
>
>  * compose a line of text and write it to the output file
>   outstr = datetime ',' u ',' v ',' temp ',' hgt
>   rc = write(fname,outstr,append)
>   if (rc != 0)
>     say "Error writing to file " fname
>     break
>   endif
>   timestep = timestep + 1
>  endwhile
>  close(fname)
> 'set t ' tmin ' ' tmax
>
>  This script assumes you have previously selected a range of times with
> "set time" or "set t", and a single point with set lat, set lon, set x, set
> y, set z, etc. It can be extended pretty easily to loop across a range of
> x-y-z values if you want to do that instead.
>
> If you are working with remote data (e.g., in gradsdods), it will probably
> be much faster if you use the "define" statement to read in large chunks of
> data at once, and then loop through them locally. In that case, you may also
> want to use 'q defval' to read numeric values directly from the defined
> variable into your script variables, and then use math_format() to convert
> the numeric values to text before composing the output string.
>
> This creates a text file with commas between the values. I'm sure there's
> some way to specify tabs instead, but I'm not sure how.
>
> I hope that helps.
>
> Matthias
>
>  On Nov 5, 2009, at 9:13 AM, Javier Pe?a wrote:
>
>   Thank you very much Matthias:
>
> It works!
> I have another question . I wish if I get several variables, these appear
> in columns in the text file. Is this possible?
> I mean, I'd like a file.txt in which appears something similar to:
>
>    Fecha                   u             v              temp         hgt
> 00Z01JUN2009   -1.9065     0.225504     288.06        9385.06
> 12Z01JUN2009   1.02317    -1.33784      295.778      9385.06
> 00Z02JUN2009   -1.15094   -3.90728      290.077      9385.06
> 12Z02JUN2009   -0.65753  -1.19813       295.153      9385.06
> Thanks. Best  Regards:
>
> Javier Pe?a
>
> 2009/11/4 Matthias Fripp <matthias.fripp at eci.ox.ac.uk>
>
>> you could use something like this:
>>
>>  'q time'
>> datetime = subwrd(result, 3)
>>
>> That will give you the date and time in grads format, e.g.,
>> "00Z01JAN1979". If you want, you could go further, with something like this:
>>
>>  formatted_time = substr(datetime, 9, 4) '/' substr(datetime, 6, 3) '/'
>> substr(datetime, 4, 2) ' ' substr(datetime, 1, 2) ':00'
>> say "formatted time: " formatted_time
>>
>> Unfortunately, I don't know any way to convert "JAN" to "01" within grads.
>> So you may need to use awk (or similar) to convert the dates after-the-fact,
>> in which case you might as well just write the datetime directly to the
>> file, and then convert that later.
>>
>> Matthias
>>
>>   On Nov 4, 2009, at 4:26 PM, Javier Pe?a wrote:
>>
>>  Hello everyone,
>>
>> I have a netcdf file from which I can obtain any of the variables with the
>> following script (for example to get u wind component):
>>
>> * takes the values of the component or in a column
>> 'reinit'
>> 'sdfopen prueba.nc'
>> 'set lat 41'
>> 'set lon 359'
>> 'set lev 1'
>> to = 1
>> * Write the variable to a file
>> * 'set gxout vector'
>> * 'set fwrite z: \ dummy.dat'
>> while (to <5)
>> 'set t' to
>> tmp =''
>> tmp = subwrd (rerult, 4)
>> 'd u', tmp = tmp%''subwrd (result, 4)
>> rrc = write ( 'c: \ prueba_c \ pruebas_archivo_ecmwf \ new_u.txt', tmp)
>> to = to + 1
>> endwhile
>>
>> but my question is, can I get the date which belongs each variable value?
>> That is, if I have values for the velocity component u: 2.3, 3.4, 5.6, 3.9,
>> can I get a. txt what next?
>>
>> Date                         U (m / s)
>> 2009/12/06 00:00          2.3
>> 2009/12/06 06:00          3.4
>> 2009/12/06 18:00          5.6
>> 2009/12/07 00:00          3.9
>>
>> Thank you very much. Best regards.
>>
>> Javier Pe?a
>>
>>
>>
>
>
> --
> Javier Pe?a ?lvarez
> Energ?as Renovables
> javier.p at ereda.com
> EREDA
>
>                            Tel:  +34 91 5014755
>                            Fax: +34 91 5014756
>                  c/ T?llez 26, 28007 MADRID
>                                    www.ereda.com
>
>
>


-- 
Javier Pe?a ?lvarez
Energ?as Renovables
javier.p at ereda.com
EREDA

                           Tel:  +34 91 5014755
                           Fax: +34 91 5014756
                 c/ T?llez 26, 28007 MADRID
                                   www.ereda.com
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From glaubermariano at YAHOO.COM.BR  Fri Nov  6 04:52:28 2009
From: glaubermariano at YAHOO.COM.BR (Glauber Mariano)
Date: Fri, 6 Nov 2009 01:52:28 -0800
Subject: Unsubscribe
Message-ID: <FRI.6.NOV.2009.015228.0800.>

Unsubscribe

 
---------------------------------------------------------------------------------------------------------------------------------------------------------
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Doutorando em Meteorologia

Divis?o de Meteorologia e Meio Ambiente - DMA
Centro de Previs?o do Tempo e Estudos Clim?ticos - CPTEC
Instituto Nacional de Pesquisas Espaciais - INPE
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Tel: +55 (12) 3945-6184 / +55 (12) 9135-4449
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From sabrina.gentile at AQUILA.INFN.IT  Fri Nov  6 05:11:44 2009
From: sabrina.gentile at AQUILA.INFN.IT (Sabrina Gentile)
Date: Fri, 6 Nov 2009 11:11:44 +0100
Subject: Unsubscribe
Message-ID: <FRI.6.NOV.2009.111144.0100.>

unsuscribe
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From mdeastin at UNCC.EDU  Fri Nov  6 05:49:10 2009
From: mdeastin at UNCC.EDU (Eastin, Matthew)
Date: Fri, 6 Nov 2009 05:49:10 -0500
Subject: unsubscribe
Message-ID: <FRI.6.NOV.2009.054910.0500.>

 

 

 

=====================================================

Dr. Matthew D. Eastin

Assistant Professor of Meteorology

Department of Geography and Earth Sciences

University of North Carolina at Charlotte

9201 University City Blvd

Charlotte, NC 28223

704-687-5914 (office)

704-687-5966 (fax)

mdeastin at uncc.edu

http://www.geoearth.uncc.edu/

=====================================================

If you are not the intended recipient of this transmission or a person
responsible for delivering it to the intended recipient, any disclosure,
copying, distribution, or other use of any of the information in this
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From h.meteo.shirazu at GMAIL.COM  Fri Nov  6 07:21:04 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Fri, 6 Nov 2009 06:21:04 -0600
Subject: hdf open
Message-ID: <FRI.6.NOV.2009.062104.0600.>

Hi

I upload a hdf file to this link;
http://www.mediafire.com/download.php?mydvzqtzytm
that's a pice of terra satellite image with 5.8Mb size
I want to open it with grads,
I read the manual and found I should use 'xdfopen' to read it by grads. But
I still could not
figure out how to write the descriptor file for this file
Can any one help me?
thanks
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From sushantpuranik at GMAIL.COM  Fri Nov  6 07:40:25 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Fri, 6 Nov 2009 18:10:25 +0530
Subject: How to make composite plot
Message-ID: <FRI.6.NOV.2009.181025.0530.>

Hello everyone
I wish to make daily composite plot for 20 years data. I want to know how to
make a daily composite plot. Since i have daily as well as monthly data.

Thank you

--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From sd19surf at GMAIL.COM  Fri Nov  6 07:51:16 2009
From: sd19surf at GMAIL.COM (Shawn Delaney)
Date: Fri, 6 Nov 2009 07:51:16 -0500
Subject: how to write a ASCII file by GrADS
In-Reply-To: <Pine.LNX.4.64.0911052059240.27464@mail.meto.umd.edu>
Message-ID: <FRI.6.NOV.2009.075116.0500.>

Hao,

I use this line and it writes to a text file.

var = write('<filename>','<text>')

Below is an example w/variables mixed in.
icao = user input
fhght = calculated from model over user selected time

res = write (icao'_MEF.txt','Lowest Freezing Level:' fhght'FT')

Hope this helps you,

Shawn Delaney
expweather.com

On Thu, Nov 5, 2009 at 9:03 PM, Hao He <hhe at atmos.umd.edu> wrote:

> Hi,
>   I used GrADS to read the GRIB file and wanted to selected some
> variables, which can be write to an ASCII (.txt or .dat) file. I read the
> manual and found I should use 'gxout fwrite'. But I still could not
> figure out how to write the script. Does anyone have an idea?
>
> Thanks!
>
> Hao
>
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From h.meteo.shirazu at GMAIL.COM  Fri Nov  6 08:07:03 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Fri, 6 Nov 2009 07:07:03 -0600
Subject: How to make composite plot
In-Reply-To: <72e8bd3d0911060440p3a79dc8j9fb53a763b4c18b@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.070703.0600.>

On Fri, Nov 6, 2009 at 6:40 AM, sushant puranik <sushantpuranik at gmail.com>wrote:

> Hello everyone
> I wish to make daily composite plot for 20 years data. I want to know how
> to make a daily composite plot. Since i have daily as well as monthly data.
>
> Thank you
>
> --
> Sushant Puranik
> Junior Research Fellow
> Dept. of Atmospheric & Space Sciences,
> University of Pune,
> Pune-07,
> India.
>
 hi
1-if your data is grads's data? ( I mean is your data format support by
grads? such az *.nc)
 2- if yes, you should set time for periods you want ( e.g. 'set t 1 30')
 3-set your other variable such az: latitude and longitude and ,,,
 4- display  variable
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From hersala at GMAIL.COM  Fri Nov  6 08:10:28 2009
From: hersala at GMAIL.COM (hersala)
Date: Fri, 6 Nov 2009 10:10:28 -0300
Subject: how to write a ASCII file by GrADS
In-Reply-To: <Pine.LNX.4.64.0911052059240.27464@mail.meto.umd.edu>
Message-ID: <FRI.6.NOV.2009.101028.0300.>

Hi Hao:
I have solved this difficulty using this grads script that is already posted
in:

http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file

It works really fine.
Best regards
Hern?n




2009/11/5 Hao He <hhe at atmos.umd.edu>

> Hi,
>   I used GrADS to read the GRIB file and wanted to selected some
> variables, which can be write to an ASCII (.txt or .dat) file. I read the
> manual and found I should use 'gxout fwrite'. But I still could not
> figure out how to write the script. Does anyone have an idea?
>
> Thanks!
>
> Hao
>
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From h.meteo.shirazu at GMAIL.COM  Fri Nov  6 08:26:02 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Fri, 6 Nov 2009 07:26:02 -0600
Subject: write to text file
Message-ID: <FRI.6.NOV.2009.072602.0600.>

Hi
I attached a file for you
can you write it's data to a text file
I wish you set lat. and lon and then write it to text file
set lat 20 50
set lon 10 40
and in your text file I wish  you export u;v such below;

            lon=10   lon=20  lon=30
lat=20   u;v         u;v       u;v
lat=30   u;v         u;v       u;v
lat=40   u;v         u;v       u;v

thank you very much
good luck
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From h.meteo.shirazu at GMAIL.COM  Fri Nov  6 08:45:47 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Fri, 6 Nov 2009 07:45:47 -0600
Subject: how to write a ASCII file by GrADS
In-Reply-To: <5b40c90911060510l1a59c49i736aeb5444212fc9@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.074547.0600.>

On Fri, Nov 6, 2009 at 7:10 AM, hersala <hersala at gmail.com> wrote:

> Hi Hao:
> I have solved this difficulty using this grads script that is already
> posted in:
>
>
> http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file
>
> It works really fine.
> Best regards
> Hern?n
>
>
>
>
> 2009/11/5 Hao He <hhe at atmos.umd.edu>
>
> Hi,
>>   I used GrADS to read the GRIB file and wanted to selected some
>> variables, which can be write to an ASCII (.txt or .dat) file. I read the
>> manual and found I should use 'gxout fwrite'. But I still could not
>> figure out how to write the script. Does anyone have an idea?
>>
>> Thanks!
>>
>> Hao
>>
>  hi
>
thank you for your help (fprintf.gs)
but it can not save the latitude and longitude in the output file that save
variables
 such as below matrix;
            lat    lat    lat    lat    lat
lon       var    var   var    var   var
lon        .        .      .      .     .
lon        .        .      .      .     .
 can you cahnge the command in the fprintf.gs file to do this?
thanks
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From hersala at GMAIL.COM  Fri Nov  6 09:03:09 2009
From: hersala at GMAIL.COM (hersala)
Date: Fri, 6 Nov 2009 11:03:09 -0300
Subject: how to write a ASCII file by GrADS
In-Reply-To: <5c658ce10911060545w181852c9v33bb015dba11ba6e@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.110309.0300.>

I am almost sure that this is is possible but I do not have enough
experience to do it.
Sorry.

2009/11/6 hossein lotfi <h.meteo.shirazu at gmail.com>

>
>
> On Fri, Nov 6, 2009 at 7:10 AM, hersala <hersala at gmail.com> wrote:
>
>> Hi Hao:
>> I have solved this difficulty using this grads script that is already
>> posted in:
>>
>>
>> http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file
>>
>> It works really fine.
>> Best regards
>> Hern?n
>>
>>
>>
>>
>> 2009/11/5 Hao He <hhe at atmos.umd.edu>
>>
>> Hi,
>>>   I used GrADS to read the GRIB file and wanted to selected some
>>> variables, which can be write to an ASCII (.txt or .dat) file. I read the
>>> manual and found I should use 'gxout fwrite'. But I still could not
>>> figure out how to write the script. Does anyone have an idea?
>>>
>>> Thanks!
>>>
>>> Hao
>>>
>>  hi
>>
> thank you for your help (fprintf.gs)
> but it can not save the latitude and longitude in the output file that save
> variables
>  such as below matrix;
>             lat    lat    lat    lat    lat
> lon       var    var   var    var   var
> lon        .        .      .      .     .
> lon        .        .      .      .     .
>  can you cahnge the command in the fprintf.gs file to do this?
> thanks
>
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From jships at BELLSOUTH.NET  Fri Nov  6 09:09:01 2009
From: jships at BELLSOUTH.NET (Joseph Ships)
Date: Fri, 6 Nov 2009 06:09:01 -0800
Subject: UNSUBSCRIBE
Message-ID: <FRI.6.NOV.2009.060901.0800.>

UNSUBSCRIBE
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From matthias.fripp at ECI.OX.AC.UK  Fri Nov  6 10:25:17 2009
From: matthias.fripp at ECI.OX.AC.UK (Matthias Fripp)
Date: Fri, 6 Nov 2009 15:25:17 +0000
Subject: how to write a ASCII file by GrADS
In-Reply-To: <5c658ce10911060545w181852c9v33bb015dba11ba6e@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.152517.0000.>

You can do this using techniques that have been shown on this list  
recently, and a little creativity. All you really need are a couple of  
loops and a "write()" command. I have attached a script that does  
this. This script writes data for each longitude in one column of the  
output file, and each latitude in one row. The longitude or latitude  
is shown at the start of each column or row (respectively). All values  
are separated with single spaces.

If you want latitudes in columns and longitudes in rows (as shown in  
your example file), you will need to change x, y, lat and lon where  
needed in the script. If you want more spaces or other characters  
between the values, you can also revise the script to do that.

Matthias



On Nov 6, 2009, at 1:45 PM, hossein lotfi wrote:

>
>
> On Fri, Nov 6, 2009 at 7:10 AM, hersala <hersala at gmail.com> wrote:
> Hi Hao:
> I have solved this difficulty using this grads script that is  
> already posted in:
>
> http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file
>
> It works really fine.
> Best regards
> Hern?n
>
>
>
>
> 2009/11/5 Hao He <hhe at atmos.umd.edu>
>
> Hi,
>   I used GrADS to read the GRIB file and wanted to selected some
> variables, which can be write to an ASCII (.txt or .dat) file. I  
> read the
> manual and found I should use 'gxout fwrite'. But I still could not
> figure out how to write the script. Does anyone have an idea?
>
> Thanks!
>
> Hao
>  hi
> thank you for your help (fprintf.gs)
> but it can not save the latitude and longitude in the output file  
> that save variables
>  such as below matrix;
>             lat    lat    lat    lat    lat
> lon       var    var   var    var   var
> lon        .        .      .      .     .
> lon        .        .      .      .     .
>  can you cahnge the command in the fprintf.gs file to do this?
> thanks

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From kamil at UALBERTA.CA  Fri Nov  6 11:11:14 2009
From: kamil at UALBERTA.CA (kamil Marcinkowski)
Date: Fri, 6 Nov 2009 09:11:14 -0700
Subject: Unsubscribe
Message-ID: <FRI.6.NOV.2009.091114.0700.>

Unsubscribe


Kamil Marcinkowski                   Westgrid System Administrator
kamil at ualberta.ca                     University of Alberta site
  Tel.780 492-0354                     Research Computing Support
Fax.780 492-1729                     Academic ICT
Edmonton, Alberta, CANADA    University of Alberta


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From claudiomet at GMAIL.COM  Fri Nov  6 11:59:10 2009
From: claudiomet at GMAIL.COM (claudio cortes)
Date: Fri, 6 Nov 2009 13:59:10 -0300
Subject: cloud cover historical data
Message-ID: <FRI.6.NOV.2009.135910.0300.>

greetings

when I need historical data for climatological studies, I download
datasetes from this ftp:
ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
where can I find historical values of temperature, geotential heights,
humidity and wind
and this information I can extract it using grads

but at this moment, I need cloud cover historial data and
where can I find cloud cover historical datasets ?

thaks !

--
Claudio Cortes
+56 (2) 2994121

Meteorologo
Laboratorio de Meteorologia y Calidad de Aire
Centro Nacional del Medio Ambiente (CENMA)
--------------------------------------------------------------------------------------

Claudio Cortes
+56 (2) 2994121

Meteorologist
Meteorology and Air Quality Labs
National Enviroment Center, Chile (CENMA)


From jdduda at IASTATE.EDU  Fri Nov  6 12:06:42 2009
From: jdduda at IASTATE.EDU (Jeffrey Duda)
Date: Fri, 6 Nov 2009 11:06:42 -0600
Subject: cloud cover historical data
In-Reply-To: <5f3ba4e00911060859r6e1c2946sf7bed2c13377902d@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.110642.0600.>

Claudio,
Try the NOMDADS site from NCDC: http://nomads.ncdc.noaa.gov/data/

There are a ton of archived analyses and model output, and you can check
them to see if any of them have cloud cover data.  I know in particular that
eta data (first directory on the site in that link) has total atmospheric
cloud cover in % as a variable.  Hopefully this site has what you are
looking for.

Jeff Duda

On Fri, Nov 6, 2009 at 10:59 AM, claudio cortes <claudiomet at gmail.com>wrote:

> greetings
>
> when I need historical data for climatological studies, I download
> datasetes from this ftp:
> ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
> where can I find historical values of temperature, geotential heights,
> humidity and wind
> and this information I can extract it using grads
>
> but at this moment, I need cloud cover historial data and
> where can I find cloud cover historical datasets ?
>
> thaks !
>
> --
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologo
> Laboratorio de Meteorologia y Calidad de Aire
> Centro Nacional del Medio Ambiente (CENMA)
>
> --------------------------------------------------------------------------------------
>
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologist
> Meteorology and Air Quality Labs
> National Enviroment Center, Chile (CENMA)
>



--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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From mike.bosilovich at GMAIL.COM  Fri Nov  6 12:53:35 2009
From: mike.bosilovich at GMAIL.COM (Mike Bosilovich)
Date: Fri, 6 Nov 2009 12:53:35 -0500
Subject: cloud cover historical data
In-Reply-To: <5f3ba4e00911060859r6e1c2946sf7bed2c13377902d@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.125335.0500.>

Hi Claudio,

Just a word of caution. Any reanalysis data is not actually
observations, and each reanalysis has it's own bias and uncertainty,
NCEP or otherwise. One reanalysis is not necessarily representative of
reality, especially in the physics output. Clouds and precipitation
can be much more related to the model part of the data assimilation
system. Temperature and heights less so, until you move toward data
sparse regions.

That said MERRA produces reanalysis cloud fields (1/2 degree
resolution, global). The following links can be opened in gradsdap or
opengrads sessions (sdfopen) to get the MERRA cloud fields:

1 hourly frequency: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MAT1NXRAD
Monthly: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MATMNXRAD

The main data page is at:
http://disc.sci.gsfc.nasa.gov/daac-bin/DataHoldings.pl with a variety
of download options.

Also, you may be interested in installing opengrads on your computer.
It has command lines built in for "merra" and "nomads", and these open
gui interfaces to each reanalyses Grads Data Servers.

Good Luck and have a great weekend!!

Mike

On Fri, Nov 6, 2009 at 11:59 AM, claudio cortes <claudiomet at gmail.com> wrote:
> greetings
>
> when I need historical data for climatological studies, I download
> datasetes from this ftp:
> ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
> where can I find historical values of temperature, geotential heights,
> humidity and wind
> and this information I can extract it using grads
>
> but at this moment, I need cloud cover historial data and
> where can I find cloud cover historical datasets ?
>
> thaks !
>
> --
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologo
> Laboratorio de Meteorologia y Calidad de Aire
> Centro Nacional del Medio Ambiente (CENMA)
> --------------------------------------------------------------------------------------
>
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologist
> Meteorology and Air Quality Labs
> National Enviroment Center, Chile (CENMA)
>


From mitchell at ATMOS.WASHINGTON.EDU  Fri Nov  6 13:44:58 2009
From: mitchell at ATMOS.WASHINGTON.EDU (Todd MItchell)
Date: Fri, 6 Nov 2009 10:44:58 -0800
Subject: cloud cover historical data
In-Reply-To: <5f3ba4e00911060859r6e1c2946sf7bed2c13377902d@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.104458.0800.>

Claudio,                                  Friday 6 November 2009

You should go to the NCAR "Computational and Information Systems
Laboratory" (CISL)
--- this used to be called the NCAR data activity ---- and look there.
http://search.dss.ucar.edu/cgi-bin/dssearch?words=cloud

ICOADS has marine cloudiness
There is the Warren and collaborators cloud climatology (land and sea)

Todd Mitchell


claudio cortes wrote:
> greetings
>
> when I need historical data for climatological studies, I download
> datasetes from this ftp:
> ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
> where can I find historical values of temperature, geotential heights,
> humidity and wind
> and this information I can extract it using grads
>
> but at this moment, I need cloud cover historial data and
> where can I find cloud cover historical datasets ?
>
> thaks !
>
> --
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologo
> Laboratorio de Meteorologia y Calidad de Aire
> Centro Nacional del Medio Ambiente (CENMA)
> --------------------------------------------------------------------------------------
>
> Claudio Cortes
> +56 (2) 2994121
>
> Meteorologist
> Meteorology and Air Quality Labs
> National Enviroment Center, Chile (CENMA)
>


--
Joint Institute for the Study of the Atmosphere and Ocean (JISAO)
University of Washington; Box 355672, Seattle WA 98195-5672
Phone: 206 685 3786; Fax: 206 685 3397; jisao.washington.edu
Street Address: 3737 Brooklyn Ave. NE, Seattle WA 98105


From h.meteo.shirazu at GMAIL.COM  Fri Nov  6 16:25:53 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Fri, 6 Nov 2009 15:25:53 -0600
Subject: cloud cover historical data
In-Reply-To: <79aecae70911060953i7e65329fp7cd1c7edc363e85b@mail.gmail.com>
Message-ID: <FRI.6.NOV.2009.152553.0600.>

On Fri, Nov 6, 2009 at 11:53 AM, Mike Bosilovich
<mike.bosilovich at gmail.com>wrote:

> Hi Claudio,
>
> Just a word of caution. Any reanalysis data is not actually
> observations, and each reanalysis has it's own bias and uncertainty,
> NCEP or otherwise. One reanalysis is not necessarily representative of
> reality, especially in the physics output. Clouds and precipitation
> can be much more related to the model part of the data assimilation
> system. Temperature and heights less so, until you move toward data
> sparse regions.
>
> That said MERRA produces reanalysis cloud fields (1/2 degree
> resolution, global). The following links can be opened in gradsdap or
> opengrads sessions (sdfopen) to get the MERRA cloud fields:
>
> 1 hourly frequency: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MAT1NXRAD<http://goldsmr2.sci.gsfc.nasa.gov/dods/MAT1NXRAD>
> Monthly: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MATMNXRAD<http://goldsmr2.sci.gsfc.nasa.gov/dods/MATMNXRAD>
>
> The main data page is at:
> http://disc.sci.gsfc.nasa.gov/daac-bin/DataHoldings.pl with a variety
> of download options.
>
> Also, you may be interested in installing opengrads on your computer.
> It has command lines built in for "merra" and "nomads", and these open
> gui interfaces to each reanalyses Grads Data Servers.
>
> Good Luck and have a great weekend!!
>
> Mike
>
> On Fri, Nov 6, 2009 at 11:59 AM, claudio cortes <claudiomet at gmail.com>
> wrote:
> > greetings
> >
> > when I need historical data for climatological studies, I download
> > datasetes from this ftp:
> > ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
> > where can I find historical values of temperature, geotential heights,
> > humidity and wind
> > and this information I can extract it using grads
> >
> > but at this moment, I need cloud cover historial data and
> > where can I find cloud cover historical datasets ?
> >
> > thaks !
> >
> > --
> > Claudio Cortes
> > +56 (2) 2994121
> >
> > Meteorologo
> > Laboratorio de Meteorologia y Calidad de Aire
> > Centro Nacional del Medio Ambiente (CENMA)
> >
> --------------------------------------------------------------------------------------
> >
> > Claudio Cortes
> > +56 (2) 2994121
> >
> > Meteorologist
> > Meteorology and Air Quality Labs
> > National Enviroment Center, Chile (CENMA)
> >
>
Hi
Thank you very very  much for your email and links
it's has very good data
Thank you [?]   [?]   [?]  [?]  [?]  [?]  [?]
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From huidu at UCDAVIS.EDU  Fri Nov  6 20:29:06 2009
From: huidu at UCDAVIS.EDU (Hui Du)
Date: Fri, 6 Nov 2009 17:29:06 -0800
Subject: unsubscribe
Message-ID: <FRI.6.NOV.2009.172906.0800.>

unsubscribe
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From naishi at METEO.MCGILL.CA  Sat Nov  7 00:44:24 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Sat, 7 Nov 2009 00:44:24 -0500
Subject: ask for help
Message-ID: <SAT.7.NOV.2009.004424.0500.>

Hi everyone,
Does anyone know how to convert a text file to thye binary file, and then
I am able to use GrADS to display(plot) the data?
Thanks so much!
Phil


From andy at F5DATA.COM  Sat Nov  7 07:16:48 2009
From: andy at F5DATA.COM (Andrew Revering)
Date: Sat, 7 Nov 2009 06:16:48 -0600
Subject: Newbie Questions
Message-ID: <SAT.7.NOV.2009.061648.0600.>

Attached is my code and the output images.



1) The fonts for contours are pretty rough. Is it possible to use custom
anti-aliased fonts for a much more crisp/smooth look? Or perhaps replace the
labels on contours with images pre-defined displaying the proper value IE...
if its a 30 degree line, put 30.png image in place where the text would have
been.



2) I can't seem to figure out how to center and make the map 'full image'
when its set to Lambert. By default it works great with LatLon. How do I
rotate, center, and fill the image size if set to Lambert?



3) I have the projection currently set as latlon, I was able to remove the
grid, but the Lat/Lon coordinate ticks on the left and bottom part of the
map are still there. How do I shut those off, so I just have a border around
the map without coordinates displayed?



I appreciate the help.



Andy

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From arlindo.dasilva at GMAIL.COM  Sat Nov  7 08:26:53 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Sat, 7 Nov 2009 08:26:53 -0500
Subject: Newbie Questions
In-Reply-To: <200911071216.nA7CGtfX033809@mail.authsmtp.com>
Message-ID: <SAT.7.NOV.2009.082653.0500.>

On Sat, Nov 7, 2009 at 7:16 AM, Andrew Revering <andy at f5data.com> wrote:

>  Attached is my code and the output images?
>
>
>
> 1) The fonts for contours are pretty rough. Is it possible to use custom
> anti-aliased fonts for a much more crisp/smooth look? Or perhaps replace the
> labels on contours with images pre-defined displaying the proper value IE...
> if its a 30 degree line, put 30.png image in place where the text would have
> been.
>
>
>

The gxyat extension included in the OpenGrADS bundle is a replacement for
printim that produces anti-aliased fonts. Here is an example image:

      http://portal.nccs.nasa.gov/cgi-d520_fp/geos5_wx.cgi

(With printim the small blue title at the top of the image would not have
been very legible.)

Usage is pretty simple:

ga-> gxyat myimage.png

Gxyat works also as a metafile translator, so you can use it with COLA
releases, say

ga-> enable print myfle.gmf
ga-> d something
ga-> print
ga-> disable print
ga-> ! gxyat -i myfile.gmf

(You can put these lines on a gxyat.gs script.) This will create
"myfile.png". You can find more about gxyat options here:

    http://opengrads.org/wiki/index.php?title=Gxyat

 More information on the OpenGrADS bundle here:


http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle

           Arlindo

-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Sat Nov  7 08:32:50 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Sat, 7 Nov 2009 08:32:50 -0500
Subject: ask for help
In-Reply-To: <53416.207.112.103.186.1257572664.squirrel@www.meteo.mcgill.ca>
Message-ID: <SAT.7.NOV.2009.083250.0500.>

On Sat, Nov 7, 2009 at 12:44 AM, Phillip Lin <naishi at meteo.mcgill.ca> wrote:

> Hi everyone,
> Does anyone know how to convert a text file to thye binary file, and then
> I am able to use GrADS to display(plot) the data?
> Thanks so much!
> Phil
>

This recipe shows how to use Fortran to write GrADS binary files:

http://cookbooks.opengrads.org/index.php?title=Recipe-004:_Creating_GrADS_binary_gridded_files_using_FORTRAN

--
Arlindo da Silva
dasilva at alum.mit.edu
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From thi_veloso at YAHOO.COM.BR  Sat Nov  7 12:24:55 2009
From: thi_veloso at YAHOO.COM.BR (Thiago Veloso)
Date: Sat, 7 Nov 2009 09:24:55 -0800
Subject: Dealing with missing data
Message-ID: <SAT.7.NOV.2009.092455.0800.>

?Greetings everybody,
?Currently I'm working on a 7-year long, sattelite precipitation estimates dataset. The data's temporal resolution is hourly. So, for each year of data, I should have 8760 binary files. Considering the files are named sequentially (year-month-day-hour), I've created a .ctl template GrADS file which intends to open the entire sequence at once and after that convert them from binary data to ascii (I wrote a script which is functional to this task).
??My problem is: Instead the hourly output, I need daily means, but some years present missing data. Instead of 8760 files, they
 have only 8733, or 8747, and so on.?This is critical because if the series were complete, a simple "ave" function (starting from the first date and ending in the final date, incremented by 24) would produce the daily means of precipitation. But I'm sure that if I apply this function to a incomplete series, the results won't be reliable...
?So, I would like to listen your advices on how to deal with these missing files. What's the solution??
?Thanks in advance and best regards,
?Thiago Veloso.
Plants Disease LaboratoryDepartment of Phytopathology, Agronomy FacultyFederal University at Rio Grande do Sul, Brazil.  


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From Matthew.Livermore at UEA.AC.UK  Sat Nov  7 17:00:17 2009
From: Matthew.Livermore at UEA.AC.UK (Collins Chris Mr (ITCS))
Date: Sat, 7 Nov 2009 22:00:17 +0000
Subject: No subject
Message-ID: <SAT.7.NOV.2009.220017.0000.>

unsubscribe
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From hhe at ATMOS.UMD.EDU  Sat Nov  7 18:41:37 2009
From: hhe at ATMOS.UMD.EDU (Hao He)
Date: Sat, 7 Nov 2009 18:41:37 -0500
Subject: Lats4d problem
In-Reply-To: <Pine.LNX.4.64.0911071831110.23520@mail.meto.umd.edu>
Message-ID: <SAT.7.NOV.2009.184137.0500.>

  Hi,
   I want to convert GRIB data to either netCDF or HDF format. Attached are my
  GRIB data .ctl file. In gradshdf, I tried:
  lats4d -i 08.....ctl -format coards, but the code fails. Does anyone have the
  experience with this topic? Thanks!

  GrADS version: 1.9
  Lats4d version: 1.9.4
  warning: duplicate grib name: grib -1

  Hao
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dset ^0804031200_arw_d02.grb1f150000
index ^0804031200_arw_d02.grb1f150000.idx
undef 9.999E+20
title 0804031200_arw_d02.grb1f150000
*  produced by grib2ctl v0.9.12.5p33e
dtype grib 255
pdef 126 90 lcc 30.720000 107.436000 1 1 34.750000 34.750000 113.650000 10000 10000
xdef 126 linear 107.436000 0.105748330490347
ydef 90 linear 30.720000 0.0909090909090909
tdef 1 linear 12Z03apr2008 1mo
zdef 39 levels
1013 1000 975 950 925 900 875 850 825 800 775 750 725 700 675 650 625 600 575 550 525 500 475 450 425 400 375 350 325 300 275 250 225 200 150 100 50 25 10 
vars 116
no4LFTX180_0mb  0 132,116,46080 ** 180-0 mb above gnd Best (4-layer) lifted index [K]
ACPCPsfc  0 63,1,0  ** surface Convective precipitation [kg/m^2]
APCPsfc  0 61,1,0  ** surface Total precipitation [kg/m^2]
BRTMPtoa  0 118,8,0 ** top of atmos Brightness temperature [K]
BVF2clm  0 138,200,0 ** atmos column Brunt-Vaisala frequency^2 [1/s^2]
CAPEsfc  0 157,1,0  ** surface Convective Avail. Pot. Energy [J/kg]
CAPE180_0mb  0 157,116,46080 ** 180-0 mb above gnd Convective Avail. Pot. Energy [J/kg]
CAPEplg 2 157,116,0 ** Convective Avail. Pot. Energy [J/kg]
CDCONclm  0 72,200,0 ** atmos column Convective cloud cover [%]
CFRZRsfc  0 141,1,0  ** surface Categorical freezing rain [yes=1;no=0]
CICEPsfc  0 142,1,0  ** surface Categorical ice pellets [yes=1;no=0]
CINsfc  0 156,1,0  ** surface Convective inhibition [J/kg]
CIN180_0mb  0 156,116,46080 ** 180-0 mb above gnd Convective inhibition [J/kg]
CINplg 2 156,116,0 ** Convective inhibition [J/kg]
CPRATsfc  0 214,1,0  ** surface Convective precip. rate [kg/m^2/s]
CRAINsfc  0 140,1,0  ** surface Categorical rain [yes=1;no=0]
CRAINclm  0 140,200,0 ** atmos column Categorical rain [yes=1;no=0]
CSNOWsfc  0 143,1,0  ** surface Categorical snow [yes=1;no=0]
CSUSFSoilT  0 160,112,10 ** 0-10cm undergnd Clear sky upward solar flux [W/m^2]
CSUSFdlr 3 160,112,0 ** Clear sky upward solar flux [W/m^2]
DLWRFsfc  0 205,1,0  ** surface Downward long wave flux [W/m^2]
DPT2m  0 17,105,2 ** 2 m Dew point temp. [K]
DPThbl 2 17,109,0 ** Dew point temp. [K]
DPT30_0mb  0 17,116,7680 ** 30-0 mb above gnd Dew point temp. [K]
DSWRFsfc  0 204,1,0  ** surface Downward short wave flux [W/m^2]
ELONsfc  0 177,1,0  ** surface East longitude (0-360) [deg]
EVPsfc  0 57,1,0  ** surface Evaporation [kg/m^2]
GFLUXsfc  0 155,1,0  ** surface Ground heat flux [W/m^2]
HCDChcl  0 75,234,0 ** high cloud level High level cloud cover [%]
HGTsfc  0 7,1,0  ** surface Geopotential height [gpm]
HGTprs 39 7,100,0 ** Geopotential height [gpm]
HGThbl 2 7,109,0 ** Geopotential height [gpm]
HGTclb  0 7,2,0 ** cloud base Geopotential height [gpm]
HGThtfl  0 7,204,0 ** highest trop freezing level Geopotential height [gpm]
HGTl215  0 7,215,0  ** Geopotential height [gpm]
HGTclt  0 7,3,0 ** cloud top Geopotential height [gpm]
HGT0deg  0 7,4,0 ** 0C isotherm level Geopotential height [gpm]
HLCY0_3000m  0 190,106,7680 ** 3000-0 m above ground Storm relative helicity [m^2/s^2]
HLCYhlr  0 190,106,2560  ** Storm relative helicity [m^2/s^2]
HPBLsfc  0 221,1,0  ** surface Planetary boundary layer height [m]
ICECsfc  0 91,1,0  ** surface Ice concentration (ice=1;no ice=0) [fraction]
LANDsfc  0 81,1,0  ** surface Land cover (land=1;sea=0) [fraction]
LCDClcl  0 73,214,0 ** low cloud level Low level cloud cover [%]
LFTX500_1000mb 0 131,101,12900 ** 500-1000 mb Surface lifted index [K]
LHTFLsfc  0 121,1,0  ** surface Latent heat flux [W/m^2]
MCDCmcl  0 74,224,0 ** mid-cloud level Mid level cloud cover [%]
MSLETmsl  0 130,102,0  ** Mean sea level pressure (ETA model) [Pa]
MSTAVdlr  0 207,112,100  ** Moisture availability [%]
NCPCPsfc  0 62,1,0  ** surface Large scale precipitation [kg/m^2]
NLATsfc  0 176,1,0  ** surface Latitude (-90 to +90) [deg]
O3MRsfc  0 154,1,0  ** surface Ozone mixing ratio [kg/kg]
PEVAPsfc  0 228,1,0  ** surface Pot. evaporation [kg/m^2]
PLI30_0mb  0 24,116,7680 ** 30-0 mb above gnd Parcel lifted index (to 500 hPa) [K]
PRATEsfc  0 59,1,0  ** surface Precipitation rate [kg/m^2/s]
PRESsfc  0 1,1,0  ** surface Pressure [Pa]
PREShbl 2 1,109,0 ** Pressure [Pa]
PRESclb  0 1,2,0 ** cloud base Pressure [Pa]
PRESclt  0 1,3,0 ** cloud top Pressure [Pa]
PRMSLmsl  0 2,102,0  ** Pressure reduced to MSL [Pa]
PVMWclm  0 139,200,0 ** atmos column Potential vorticity (mass-weighted) [1/s/m]
PWAT30_0mb  0 54,116,7680 ** 30-0 mb above gnd Precipitable water [kg/m^2]
PWATclm  0 54,200,0 ** atmos column Precipitable water [kg/m^2]
RHprs 39 52,100,0 ** Relative humidity [%]
RH2m  0 52,105,2 ** 2 m Relative humidity [%]
RH30_0mb  0 52,116,7680 ** 30-0 mb above gnd Relative humidity [%]
SFCRsfc  0 83,1,0  ** surface Surface roughness [m]
SHTFLsfc  0 122,1,0  ** surface Sensible heat flux [W/m^2]
SNODsfc  0 66,1,0  ** surface Snow depth [m]
SNOMsfc  0 99,1,0  ** surface Snow melt [kg/m^2]
SNOWCsfc  0 238,1,0  ** surface Snow cover [%]
SOILMdlr  0 86,112,200  ** Soil moisture content [kg/m^2]
SOILWSoilT  0 144,112,10 ** 0-10cm undergnd Volumetric soil moisture [fraction]
SOILWdlr 3 144,112,0 ** Volumetric soil moisture [fraction]
SOTYPsfc  0 224,1,0  ** surface Soil type (Zobler) [0..9]
SPFHprs 39 51,100,0 ** Specific humidity [kg/kg]
SPFH2m  0 51,105,2 ** 2 m Specific humidity [kg/kg]
SPFHhbl 2 51,109,0 ** Specific humidity [kg/kg]
SPFH30_0mb  0 51,116,7680 ** 30-0 mb above gnd Specific humidity [kg/kg]
SSRUNsfc  0 235,1,0  ** surface Storm surface runoff [kg/m^2]
TCDCprs 34 71,100,0 ** Total cloud cover [%]
TCDCclm  0 71,200,0 ** atmos column Total cloud cover [%]
TMPsfc  0 11,1,0  ** surface Temp. [K]
TMPprs 39 11,100,0 ** Temp. [K]
TMP2m  0 11,105,2 ** 2 m Temp. [K]
TMPhbl 2 11,109,0 ** Temp. [K]
TMP30_0mb  0 11,116,7680 ** 30-0 mb above gnd Temp. [K]
TMPclt  0 11,3,0 ** cloud top Temp. [K]
TSLSAclm  0 137,200,0 ** atmos column 3-hr pressure tendency (Std Atmos Red) [Pa/s]
TSOILSoilB  0 85,111,300 ** 300 cm underground Soil temp. [K]
TSOILSoilT  0 85,112,10 ** 0-10cm undergnd Soil temp. [K]
TSOILdlr 3 85,112,0 ** Soil temp. [K]
UGRDprs 39 33,100,0 ** u wind [m/s]
UGRD10m  0 33,105,10 ** 10 m u wind [m/s]
UGRDhbl 2 33,109,0 ** u wind [m/s]
UGRD30_0mb  0 33,116,7680 ** 30-0 mb above gnd u wind [m/s]
ULWRFsfc  0 212,1,0  ** surface Upward long wave flux [W/m^2]
ULWRFclm  0 212,200,0 ** atmos column Upward long wave flux [W/m^2]
USTM0_6000m  0 196,106,15360 ** 6000-0 m above ground u-component of storm motion [m/s]
USWRFsfc  0 211,1,0  ** surface Upward short wave flux [W/m^2]
USWRFprs 34 211,100,0 ** Upward short wave flux [W/m^2]
USWRFhag 2 211,105,0 ** Upward short wave flux [W/m^2]
VEGsfc  0 87,1,0  ** surface Vegetation [%]
VGRDprs 39 34,100,0 ** v wind [m/s]
VGRD10m  0 34,105,10 ** 10 m v wind [m/s]
VGRDhbl 2 34,109,0 ** v wind [m/s]
VGRD30_0mb  0 34,116,7680 ** 30-0 mb above gnd v wind [m/s]
VGTYPsfc  0 225,1,0  ** surface Vegetation type (as in SiB) [0..13]
VISsfc  0 20,1,0  ** surface Visibility [m]
VISclb  0 20,2,0 ** cloud base Visibility [m]
VSTM0_6000m  0 197,106,15360 ** 6000-0 m above ground v-component of storm motion [m/s]
VVELprs 39 39,100,0 ** Pressure vertical velocity [Pa/s]
VWSHhlr  0 136,106,25088  ** Vertical speed shear [1/s]
VWSHclm  0 136,200,0 ** atmos column Vertical speed shear [1/s]
WEASDsfc  0 65,1,0  ** surface Accum. snow [kg/m^2]
WTMPsfc  0 80,1,0  ** surface Water temp. [K]
var180sfc  0 180,1,0  ** surface undefined
ENDVARS

From arlindo.dasilva at GMAIL.COM  Sat Nov  7 21:27:21 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Sat, 7 Nov 2009 21:27:21 -0500
Subject: Lats4d problem
In-Reply-To: <Pine.LNX.4.64.0911071840370.23520@mail.meto.umd.edu>
Message-ID: <SAT.7.NOV.2009.212721.0500.>

On Sat, Nov 7, 2009 at 6:41 PM, Hao He <hhe at atmos.umd.edu> wrote:

>  Hi,
>  I want to convert GRIB data to either netCDF or HDF format. Attached are
> my
>  GRIB data .ctl file. In gradshdf, I tried:
>  lats4d -i 08.....ctl -format coards, but the code fails. Does anyone have
> the
>  experience with this topic? Thanks!
>
>  GrADS version: 1.9
>  Lats4d version: 1.9.4
>  warning: duplicate grib name: grib -1
>
>
In grads 1.9 there was a bug that prevented you to use lats4d twice in a row
without exiting grads and restarting; the error message you are getting are
typical of this problem. For this reason, it was more practical to use the
lats4d.sh shell script. (Earlier on this script was simply called "lats4d",
without the .sh extension.)

  Arlindo



--
Arlindo da Silva
dasilva at alum.mit.edu
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From fdaryabor at GOOGLEMAIL.COM  Sun Nov  8 09:22:37 2009
From: fdaryabor at GOOGLEMAIL.COM (Farshid Daryabor)
Date: Sun, 8 Nov 2009 22:22:37 +0800
Subject: ask for help
In-Reply-To: <53416.207.112.103.186.1257572664.squirrel@www.meteo.mcgill.ca>
Message-ID: <SUN.8.NOV.2009.222237.0800.>

Dear Phil
You have to load variable  by using matlab and then you write following
script
In order to variable dimension that should be 2D

fid=fopen( 'var.dat', 'wb');
   for i=1 : 92
      for i=1 : 90
   if isnan(var(i,j))==0
fwrite(fid, var(i,j), 'float');
else
     fwrite(fid, -9999, 'float');
end
end
end
fclose(fid);

Best Regards
F.Daryabor




On Sat, Nov 7, 2009 at 1:44 PM, Phillip Lin <naishi at meteo.mcgill.ca> wrote:

> Hi everyone,
> Does anyone know how to convert a text file to thye binary file, and then
> I am able to use GrADS to display(plot) the data?
> Thanks so much!
> Phil
>
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From fernandez1 at CANTV.NET  Sun Nov  8 10:22:00 2009
From: fernandez1 at CANTV.NET (Luis Alfonso Fernández H.)
Date: Sun, 8 Nov 2009 10:52:00 -0430
Subject: unsubscribe
Message-ID: <SUN.8.NOV.2009.105200.0430.>

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From hhe at ATMOS.UMD.EDU  Sun Nov  8 21:54:53 2009
From: hhe at ATMOS.UMD.EDU (Hao He)
Date: Sun, 8 Nov 2009 21:54:53 -0500
Subject: Lats4d problem
In-Reply-To: <77fcd6b20911071827q3893097et457ee819a5c78cea@mail.gmail.com>
Message-ID: <SUN.8.NOV.2009.215453.0500.>

Arlindo,
   I found the lats4d.sh and put it under my current path. But when I use
./lats4d.sh, it says ' command not found'.

Hao

|  Hao He                                       |
|  Graduate Assistant                           |
|  CSS bldg 4365                                |
|  Jull Hall lab (301)405-7625                  |
|  Cellphone     (240)672-7912                  |
|  Department of Atmospheric & Oceanic Science  |
|  University of Maryland                       |
|  College Park, MD 20742                       |

On Sat, 7 Nov 2009, Arlindo da Silva wrote:

> On Sat, Nov 7, 2009 at 6:41 PM, Hao He <hhe at atmos.umd.edu> wrote:
>
>>  Hi,
>>  I want to convert GRIB data to either netCDF or HDF format. Attached are
>> my
>>  GRIB data .ctl file. In gradshdf, I tried:
>>  lats4d -i 08.....ctl -format coards, but the code fails. Does anyone have
>> the
>>  experience with this topic? Thanks!
>>
>>  GrADS version: 1.9
>>  Lats4d version: 1.9.4
>>  warning: duplicate grib name: grib -1
>>
>>
> In grads 1.9 there was a bug that prevented you to use lats4d twice in a row
> without exiting grads and restarting; the error message you are getting are
> typical of this problem. For this reason, it was more practical to use the
> lats4d.sh shell script. (Earlier on this script was simply called "lats4d",
> without the .sh extension.)
>
>  Arlindo
>
>
>
> --
> Arlindo da Silva
> dasilva at alum.mit.edu
>


From c.hayes at WEERONLINE.NL  Mon Nov  9 06:19:28 2009
From: c.hayes at WEERONLINE.NL (Chris Hayes)
Date: Mon, 9 Nov 2009 12:19:28 +0100
Subject: Windvectormap
Message-ID: <MON.9.NOV.2009.121928.0100.>

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From sachinghude at TROPMET.RES.IN  Mon Nov  9 07:55:58 2009
From: sachinghude at TROPMET.RES.IN (Sachin Ghude)
Date: Mon, 9 Nov 2009 18:25:58 +0530
Subject: Plotting values between to counter levels
Message-ID: <MON.9.NOV.2009.182558.0530.>

Hi!

Is there any utility in GRADS to plot values only between two contour levels?

For example, I want to display ozone data over Indian region between the contour levels
180 - 200 DU? Is it possible to mask values above 200 and below 100?

Thanks in Advance.

Sachin


From zjuyanlibin at 163.COM  Mon Nov  9 08:35:02 2009
From: zjuyanlibin at 163.COM (=?utf-8?B?WWFuIExpYmlu?=)
Date: Mon, 9 Nov 2009 21:35:02 +0800
Subject: =?utf-8?B?UmU6IFBsb3R0aW5nIHZhbHVlcyBiZXR3ZWVuIHRvIGNvdW50ZXIgbGV2ZWxz?=
Message-ID: <MON.9.NOV.2009.213502.0800.>

black

or

plot twice

set cmax
d *
set cmin
d *


2009-11-09 



Yan Libin 



???? Sachin Ghude 
????? 2009-11-09  20:43:40 
???? GRADSUSR 
??? 
??? Plotting values between to counter levels 
 
Hi!
Is there any utility in GRADS to plot values only between two contour levels?
For example, I want to display ozone data over Indian region between the contour levels
180 - 200 DU? Is it possible to mask values above 200 and below 100?
Thanks in Advance.
Sachin
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From paul.wittmann at NAVY.MIL  Mon Nov  9 10:14:38 2009
From: paul.wittmann at NAVY.MIL (Wittmann, Paul A CIV 63134)
Date: Mon, 9 Nov 2009 07:14:38 -0800
Subject: UNSUBSCIBE
Message-ID: <MON.9.NOV.2009.071438.0800.>

 unsubscribe
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From jma at COLA.IGES.ORG  Mon Nov  9 10:24:17 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Mon, 9 Nov 2009 10:24:17 -0500
Subject: INSTRUCTIONS FOR UNSUBSCRIBING
Message-ID: <MON.9.NOV.2009.102417.0500.>

To unsubscribe, DO NOT send a request to gradsusr at list.cineca.it,
please do the following:

Send an email containing the message "SIGNOFF GRADSUSR" to listserv at list.cineca.it



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From jmssnyder at UCDAVIS.EDU  Mon Nov  9 11:57:34 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Mon, 9 Nov 2009 17:57:34 +0100
Subject: Compositing wind and pressure data based on certain OLR values
Message-ID: <MON.9.NOV.2009.175734.0100.>

I am trying to make a script that composites pressure values from dates
when OLR values over a certain area (latitude range: 15S to 15N and
longitude: 120E and 120W) are below a certain value.  I tried using this
script and it did not seem to work properly.  What should I do to make
this script so that I can make this script work properly?  Also how can I
composite wind data at specific pressure levels such as 850 mb and 500 mb
based on this script?
'sdfopen olr.day.mean.nc'
'sdfopen pres.sfc.1993.nc'
'set t 6790'
'define presa = 0'
count = 6790
while (count < 12267)
   'set t 'count
   'define olra = aave(olr,lon=120,lon=240,lat=-15,lat=15)'
   'd count'
   if (olra < 230)
      'define presb = pres.2'
   else
      'define presb = 0'
   endif
'define presa = presa + presb'
count = count + 1
endwhile
'define presavg=presa'

-Jason


From David.Mocko at NASA.GOV  Mon Nov  9 14:55:59 2009
From: David.Mocko at NASA.GOV (David Mocko)
Date: Mon, 9 Nov 2009 14:55:59 -0500
Subject: NLDAS-2 release announcement
Message-ID: <MON.9.NOV.2009.145559.0500.>

North America Land Data Assimilation System Phase 2 (NLDAS-2)
hourly products released to the public.

The NASA GSFC Hydrological Sciences Branch and Goddard Earth Sciences
Data and Information Service Center (GES DISC) are pleased to announce
the release of North America Land Data Assimilation System Phase 2
(NLDAS-2) data products in the Hydrology DISC.

NLDAS-2 products are a 30-year data set (1979-present, in near
real-time) of hourly 1/8th-degree surface meteorology and hydrology data
over the continuous United States and parts of Canada and Mexico.  NLDAS
combines observations from many different sources (rain gauges, radar,
satellite, model reanalysis) to generate a surface forcing dataset,
which is used to drive several different land-surface models.  The
current data hosted at the GES DISC include both primary and secondary
forcing data and Mosaic model outputs.

Users can access the data by searching and downloading via
anonymous ftp or through the GES DISC search interface Mirador
(http://mirador.gsfc.nasa.gov).  Mirador, is an innovative data search
engine that makes use of keywords to find data quickly in a Google-like
interface.  NLDAS data are also provided through a GrADS Data Server
(GDS) at http://hydro1.gsfc.nasa.gov/dods/.  GDS users can access the
data and perform subsetting and analysis operations online.  More
advanced tools will be provided in later releases, such as spatial and
parameter subsetting, data format transformation, and access through
the GES DISC online visualization and analysis system *Giovanni*.

Data access link: http://disc.sci.gsfc.nasa.gov/hydrology/data-holdings

--
--------------------------------------------------------------------------
David M. Mocko, Building 33, Room C315                David.Mocko at nasa.gov
SAIC & Climate and Radiation Branch                  Voice: (301)-614-6222
NASA Goddard Space Flight Center                       Fax: (301)-614-6307
Code 613.2, Greenbelt MD 20771        http://climate.gsfc.nasa.gov/~mocko/
--------------------------------------------------------------------------


From dasilva at ALUM.MIT.EDU  Mon Nov  9 21:52:30 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Mon, 9 Nov 2009 21:52:30 -0500
Subject: Newbie Questions
In-Reply-To: <a3b263e60911091726s548f4938h2e72b781d9d58f9b@mail.gmail.com>
Message-ID: <MON.9.NOV.2009.215230.0500.>

On Mon, Nov 9, 2009 at 8:26 PM, Fil <fil at meteopt.com> wrote:

> The first with printim and the second with gxyat:
>
> http://img254.imageshack.us/img254/6131/tmp1.png
> http://img36.imageshack.us/img36/3447/tmp2.png
>
> I think map lines gets a bit too thick.


It appears that your plotting script is changing the thickness of the
contour lines, check your script. You are better off taking the default line
thickness rather then correcting it at the image creation step.


> Yours seems ok.


I take the default thickness for the contour lines.


> Also, label's color changes from black to gray, wind arrows has a brighter
> gray and a strange white dotted line shows at 0? longitude.


I believe these are a consequence of the way anti-aliasing is implemented.
Anti-aliasing is a perceptual approximation which plays with the
transparency of adjacent pixels to give the illusion of smoothness. Try
playing with the font sizes, the colorbar fonts look "black" on my screen.
 As for the dashed line at the prime meridian, I haven't seen it before. It
is something to be looked at.


> But overall it's a much better looking map :)
>
>
You may be able to tweak your plot for optimal results.

  Good Luck,

     Arlindo

>
>

-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From sachinghude at TROPMET.RES.IN  Mon Nov  9 23:30:02 2009
From: sachinghude at TROPMET.RES.IN (Sachin Ghude)
Date: Tue, 10 Nov 2009 10:00:02 +0530
Subject: Plotting values between counter levels
In-Reply-To: <200911092135013433278@163.com>
Message-ID: <TUE.10.NOV.2009.100002.0530.>

Thanks Libin!

As per your suggestion it will only display the values between two contour level 180 - 200.

Actually, I want something else.

First,I want to mask all the values below 180 and above 200. Then multiply it (values in between 180-200) by some constant factor (eg. say 22) and then display the final result.

Sachin

---------- Original Message -----------
From: Yan Libin
To: GRADSUSR at list.cineca.it
Sent: Mon, 9 Nov 2009 21:35:02 0800
Subject: Re: Plotting values between to counter levels

> [UTF-8?]&#65279;
> black
> ?
> or
> ?
> plot twice
> ?
> set cmax
> d *
> set cmin
> d *
> ?
> ?
> 2009-11-09

-----------------------------------------------------------------------

> Yan Libin

-----------------------------------------------------------------------

> &#21457;&#20214;&#20154;&#65306; Sachin Ghude
> &#21457;&#36865;&#26102;&#38388;&#65306; 2009-11-09? 20:43:40
> &#25910;&#20214;&#20154;&#65306; GRADSUSR
> &#25220;&#36865;&#65306;
> &#20027;&#39064;&#65306; Plotting values between to counter levels
>
>
> Hi!
>
> Is?there?any?utility?in?GRADS?to? plot?values?only?between?two?contour? levels?
>
> For?example,?I?want?to?display? ozone?data?over?Indian?region?between?the? contour? levels
> 180?-?200?DU??Is?it?possible?to? mask?values?above?200?and?below? 100?
>
> Thanks?in? Advance.
>
> Sachin
------- End of Original Message -------


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From andy at F5DATA.COM  Tue Nov 10 05:13:47 2009
From: andy at F5DATA.COM (Andrew Revering)
Date: Tue, 10 Nov 2009 04:13:47 -0600
Subject: CPU Performance
Message-ID: <TUE.10.NOV.2009.041347.0600.>

I'm curious if anyone has any performance information with GrADS on a 64 bit
OS vs 32 bit OS, and if GrADS is capable of using a multi-core processor?



Is it best to get a fast single core machine, or does it actually utilize
all the cores of a multi-core processor?



This may be a stupid question, but I'm fairly new to Linux so I'm not sure
if the individual programs need to be programmed to utilize the processor
like they do under Windows.



Andy





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From jma at COLA.IGES.ORG  Tue Nov 10 11:35:10 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Tue, 10 Nov 2009 11:35:10 -0500
Subject: CPU Performance
In-Reply-To: <200911101013.nAAADwoW090161@mail.authsmtp.com>
Message-ID: <TUE.10.NOV.2009.113510.0500.>

GrADS runs as a single process on a single core. There is no multi- 
anything in GrADS at this point.
I have never done any benchmarking for 32-bit vs. 64-bit operating  
systems.

John Huddleston (who is mysteriously unable to reply to gradsusr  
posts) has this to offer:

> I am forwarding our analysis of creating GrADS images of NASA  
> satellite data using a 32 bit Ubuntu 8.04 server.
>
The I/O performance for hdf5 data sets is extremely dependent on  
whether/how the data are chunked, and also on the cache size settings  
in the hdf5 library. I am doing some testing to see how to improve the  
hdf5 performance in GrADS for the next release.

--Jennifer

On Nov 10, 2009, at 5:13 AM, Andrew Revering wrote:

> I?m curious if anyone has any performance information with GrADS on  
> a 64 bit OS vs 32 bit OS, and if GrADS is capable of using a multi- 
> core processor?
>
> Is it best to get a fast single core machine, or does it actually  
> utilize all the cores of a multi-core processor?
>
> This may be a stupid question, but I?m fairly new to Linux so I?m  
> not sure if the individual programs need to be programmed to utilize  
> the processor like they do under Windows.
>
> Andy
>
>

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From jmssnyder at UCDAVIS.EDU  Tue Nov 10 15:05:24 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Tue, 10 Nov 2009 21:05:24 +0100
Subject: compositing wind and pressure data based on certain OLR values
Message-ID: <TUE.10.NOV.2009.210524.0100.>

I am trying to make a script that composites pressure values from dates
when OLR values over a certain area (latitude range: 5S to 5N and
longitude: 120E and 120W) are below a certain value.  I tried using this
script and it did not seem to work properly.  What should I do to make
this script so that I can make this script work properly?  Also how can I
composite wind data at specific pressure levels such as 850 mb and 500 mb
based on this script?
'sdfopen olr.day.mean.nc'
'sdfopen pres.sfc.1993.nc'
'set t 6790'
'define presa = 0'
'define number = 0'
count = 6790
while (count < 12267)
   'set t 'count
   'define olra = aave(olr,lon=120,lon=240,lat=-5,lat=5)'
   if (olra < 230)
      'define presb = pres.2'
      'define n=1'
   else
      'define presb = 0'
      'define n = 0'
   endif
'define presa = presa + presb'
'define number = number + n'
count = count + 1
endwhile
'define presavg=presa'


If someone has any suggestions on what to do with this script to make it
composite wind/pressure data for days where the average OLR values within
the area 120 W to 120 E and 15S to 15N, is less than 234, that would be
greatly appreciated.

Thanks,

Jason
-Jason


From dasilva at ALUM.MIT.EDU  Tue Nov 10 16:29:26 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Tue, 10 Nov 2009 16:29:26 -0500
Subject: Another free shapefile for world maps
Message-ID: <TUE.10.NOV.2009.162926.0500.>

All,

 For those working with shapefiles: Fil just brought to my attention this
free shapefile with world map boundaries:

 http://aprsworld.net/gisdata/world/

  You can use this shapefile with the OpenGrADS shape extension:

     http://opengrads.org/doc/udxt/shape/

         Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Tue Nov 10 17:16:57 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Tue, 10 Nov 2009 17:16:57 -0500
Subject: gxyat
In-Reply-To: <5973FF702D942347837871E2BA794C810242509775@zeus.sws.uiuc.edu>
Message-ID: <TUE.10.NOV.2009.171657.0500.>

On Tue, Nov 10, 2009 at 10:05 AM, Timlin, Michael <mtimlin at illinois.edu>wrote:

>  Arlindo,
>
>
>
> We are running grads 2.0a3 (but not opengrads) and I would love to be able
> to use gxyat.  The improved fonts would be great.
>
>
>
> Is there anyway to use it in grads as a direct replacement for printim?
>
Yes, you may be able to write a "printim.gs" script which saves a metafile
and uses gxyat with a "!".  Gxyat syntax is similar but not identical to
printim. Performance. of course, is much better with the "gxyat" extension
which does not involve writing any metafile.

Can I use the stand alone gxyat with regular grads meta files?
>

Yes.


> Where can I download the stand alone version?
>
Unfortunately, you need to download the full opengrads bundle and grab the
"gxyat" executable from the bin/ directory. We do not provide a separate
download at this time. (If it complains about missing .so libraries, see the
troubleshooting section of the INSTALL file for a simple fix. )

What all is involved with opengrads installation?
>

It is trivial. Untar it, and set your path. That is it, nothing else to set,
or extra files to download. More info here:


http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle

> Would it break anything that is currently working in grads or is it a
> superset of grads?
>
It is a superset. As a rule, if you do not invoke the extensions, you get
the regular GrADS from COLA. The main philosophy of the OpenGrADS project is
to complement the work of Jennifer and Brian at COLA . There is no
incompatibility that I am aware of.

Having said that, I need to mention that we have different builds, based on
slightly different baselibs. There is only OpenGrADS executable (called
"grads") which can read all the regular GrADS formats, including OPeNDAP
URLs; there is no separate "gradsdap".  It can also read NetCDF-4/HDF-5
datasets, a feature that will be available in an upcoming COLA release as
Jennifer mentioned recently. All OpenGrADS builds also enable the Athena GUI
and ships with sample GUI scripts. If you type "nomads" from the Contents/
directory you a browser for real time GFS, NAM, RUC and Wave forecasts from
NCEP, give it a try.

> Does it keep up with the grads releases in a timely manner?
>
On a best effort basis, we try to closely follow COLA releases. The latest
version (v2.0.a7.oga.3) is caught up with COLA. However, OpenGrADS is
carried out by volunteers, and sometimes other pressing deadlines may cause
a new release to lag COLA's release by a few weeks. But usually we try to
get it out in a week or two.

> I don?t want to be a bother to the sys admin who will have to do these
> updates if it will be more complicated or if he?ll have to keep two versions
> of grads up and running.
>
  You can always download a bundle tarball and test drive it from your home
directory.

  Cheers!

     Arlindo

-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From andy at F5DATA.COM  Wed Nov 11 12:03:56 2009
From: andy at F5DATA.COM (Andrew Revering)
Date: Wed, 11 Nov 2009 11:03:56 -0600
Subject: Shading
Message-ID: <WED.11.NOV.2009.110356.0600.>

In this example:

http://portal.nccs.nasa.gov/cgi-d520_fp/geos5_wx.cgi



The number of shade levels is 'a lot'. So you get this look of something
very fluid, and hard to see one color to the next.



I tried to set cint to 1 in my map, and it does not seem to be contouring
every 1 degree.



Is this a limitation due to the number of defined colors (16) ? and when its
set to 1 there are too many levels and not enough colors?



Or is there something else I need to do so that I'm able to contour at a
very frequent interval?



Is there a way to have the default colors just circulate automatically. IE,
when you go through all the colors have it just start over again, or is this
done by default?



Andy

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From klevey at CUSTOMWEATHER.COM  Wed Nov 11 13:45:20 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Wed, 11 Nov 2009 10:45:20 -0800
Subject: Shading
In-Reply-To: <200911111704.nABH48io030908@mail.authsmtp.com>
Message-ID: <WED.11.NOV.2009.104520.0800.>

Hi Andy

cint (contour interval) only applies to contour lines, i.e. when you

set gxout contour

Shading intervals are set with

set clevs

see my example below:

Shading interval is determined by whatever you set up in your legend,  
i.e. (this is an example gs file : my_legend.gs)

*light blue to dark blue
'set rgb 41 200 255 255'
'set rgb 42 175 240 255'
'set rgb 43 130 210 255'
'set rgb 44  95 190 250'
'set rgb 45  75 180 240'
'set rgb 46  60 170 230'
'set rgb 47  40 150 210'
'set rgb 48  30 140 200'
'set rgb 49  20 130 190'
'set rgb 50  20 120 180'
'set rgb 51  20 110 170'

*light pink to dark rose
'set rgb 61 255 230 230'
'set rgb 62 255 200 200'
'set rgb 63 248 160 160'
'set rgb 64 230 140 140'
'set rgb 65 230 112 112'
'set rgb 66 230  80  80'
'set rgb 67 200  60  60'
'set rgb 68 180  40  40'
'set rgb 69 164  32  32'
'set rgb 70 134  32  32'
'set rgb 71 104  32  32'
'set rgb 72 74  32  32'

'set grads off'
'set timelab on'

'set clevs -25 -22.5 -20  -17.5  -15  -12.5  -10  -7.5  -5  -2.5   0    
2.5 5   7.5  10  12.5  15  17.5  20  22.5  25 '
'set ccols   51    50   49     48   47    46    45    44  43   42    
41   62  63  64  65   66    67  68    69  70     71  72'

Here my shading interval is 2.5.

If you wanted to plot contours + shading then you'd simply make cint  
2.5 as well.

set gxout shaded
d variable
set gxout contour
set cint 2.5
d variable
run my_legend.gs

You can define your own colors as I have above - you just need to know  
what the rgb values are. the limitations usually come

If you don't "run my_legend.gs" or if you don't specify set clevs and  
set ccols in your script, GRADS will use default colors and intervals  
and it will change from plot to plot depending on what the max/min  
values are. Using your own set colors and intervals will ensure the  
same legend range is used for all plots.

Hope this helps.

Regards,

Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of  
Cape Town)
Director of Meteorological Operations
CustomWeather, Inc.
San Francisco, California, USA

"Taking the World by Storm!"

http://www.customweather.com
http://www.myforecast.com
http://www.1stweather.com

cell: 415-794-0411
work: 415-777-3566
email: klevey at customweather.com

On Nov 11, 2009, at 11/11/09 - 9:03 AM, Andrew Revering wrote:

> In this example:
> http://portal.nccs.nasa.gov/cgi-d520_fp/geos5_wx.cgi
>
> The number of shade levels is ?a lot?. So you get this look of  
> something very fluid, and hard to see one color to the next.
>
> I tried to set cint to 1 in my map, and it does not seem to be  
> contouring every 1 degree.
>
> Is this a limitation due to the number of defined colors (16) ? and  
> when its set to 1 there are too many levels and not enough colors?
>
> Or is there something else I need to do so that I?m able to contour  
> at a very frequent interval?
>
> Is there a way to have the default colors just circulate  
> automatically? IE, when you go through all the colors have it just  
> start over again, or is this done by default?
>
> Andy

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From dasilva at ALUM.MIT.EDU  Wed Nov 11 17:35:00 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Wed, 11 Nov 2009 17:35:00 -0500
Subject: GrADS Platform Survey
Message-ID: <WED.11.NOV.2009.173500.0500.>

Dear GrADS Users,

  As we try to prioritize development at the OpenGrADS project, it becomes
important for us to understand the particular platforms and operating
systems folks are running GrADS on. Although, some of this information can
be gathered from download statistics, some other information (such as the
particular flavor of Linux) cannot. Therefore we designed a very quick
survey to collect this information. I'd be very appreciative if you could
spare 5 minutes of your time and complete this short survey:


https://spreadsheets.google.com/viewform?hl=en&formkey=dGctYWhkdTQyenZGSW40SjVOTGZWOUE6MA

  In a couple of weeks I'll post the results of the survey on this list.

  Thank you very much for your time.

     Arlindo

--
Arlindo da Silva
dasilva at opengrads.org
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From mhess at OCEANI.COM  Wed Nov 11 19:25:52 2009
From: mhess at OCEANI.COM (Mark Hess)
Date: Wed, 11 Nov 2009 17:25:52 -0700
Subject: OpenDAP GRIB Retrieval from Nomads
In-Reply-To: <4AEB3C24.60707@noaa.gov>
Message-ID: <WED.11.NOV.2009.172552.0700.>

All,

I tried to search the GRADSUSR archives for the answer to this question, but it gives me the error errno=146 "unable to initiate communication...".  Perhaps you all can offer an answer.

Does anyone have any sample strings for use with gradsdods to retreive a GFS grib file from the NWS NCEP MOMANDS OpenDAP server? (http://nomads.ncep.noaa.gov:9090/dods/gfs)

I'm especially interested in how to extract data for a specified geographical region.  

If anyone can get me started with this, I should be able to take an example and work from there.

Thank you.

Mark
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From dgunawa at GWDG.DE  Thu Nov 12 06:56:31 2009
From: dgunawa at GWDG.DE (Dodo Gunawan)
Date: Thu, 12 Nov 2009 12:56:31 +0100
Subject: UNSUBSCIBE
Message-ID: <THU.12.NOV.2009.125631.0100.>


 unsubscribe

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From diego.morelli at TRS.IT  Thu Nov 12 06:26:47 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Thu, 12 Nov 2009 12:26:47 +0100
Subject: Meaning of descriptor file (*.ctl) variable names
In-Reply-To: <77fcd6b20911111435l4bfc293dn6127e9963b04b8d2@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.122647.0100.>

When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some variables
having the suffix "mb". These variables are relative to an isobaric level
type (value 100 in the PDS grib section, octet number 10), with a value
expressed in hPa.

I see that the variables with suffix prs are relative also to an isobaric
level type.



My questions is to know what is the difference between the variable with
suffix mb and those with suffix prs.





Here there is an example of a descriptor file:

----------------------------------------------------------------------------
----------------------------------------------



dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b

index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx

undef 9.999E+20

title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b

*  produced by grib2ctl v0.9.12.5p45

dtype grib 255

options yrev

ydef 66 linear 10.000000 1

xdef 126 linear -60.000000 1.000000

tdef 1 linear 12Z18jul2009 1mo

*  z has 6 levels, for prs

zdef 6 levels

925 850 700 500 400 300

vars 2

GPprs 6 6,100,0 ** (profile) Geopotential [m^2/s^2]

VGRD925mb  0 34,100,925 ** 925 mb v wind [m/s]

ENDVARS





----------------------------------------------------------------------------
----------------------------------------------





Regards,





Diego

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From amjadozi at GMAIL.COM  Thu Nov 12 07:16:54 2009
From: amjadozi at GMAIL.COM (Muhammad Amjad)
Date: Thu, 12 Nov 2009 12:16:54 +0000
Subject: Windvectormap
In-Reply-To: <4AF7FAC0.5000400@weeronline.nl>
Message-ID: <THU.12.NOV.2009.121654.0000.>

Dear Chris,

Could you please check with the following formula:
wdir=atan2(u,v)/0.01745329 +180
The size of wind represents the wind speed. So, I don't think the dispariy
among the vectors can be removed.

Cheers,
Amjad.


On 11/9/09, Chris Hayes <c.hayes at weeronline.nl> wrote:
>
>  dear group,
>
> I need to plot the wind directions for stations with equally sized arrows.
>
> My dataset contains the direction in degrees (0-360).
>
> I use the gxout=vector map which requires a u and a v vector component
> (i.e. the vertical and horizontal vector component).
>
> u
> |      /winddir
> |    /
> |  /
> |/___ v
>
>
> I calculate u as -sin(winddir * pi/180)
> I calculate v as -cos(winddir * pi/180)
>
> resulting in the display-command    ' -8*(sin(winddir * 0.0175)) ; -8*(cos(
> winddir * 0.0175)) '
> (where 8 makes the size of the arrow, which usually represents windspeed
> but here is desired to be constant)
>
>
> The direction of the arrows looks fine.
> But some maps have only tiny arrows and some maps have only longtailed
> arrows.
> I cannot see a pattern. I have no mixed maps with tiny and large arrows.
>
> Should I change my formula, or the way I give the display command?
>
> thanks,
> Chris
>
>
>
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From bernd.becker at METOFFICE.GOV.UK  Thu Nov 12 07:37:16 2009
From: bernd.becker at METOFFICE.GOV.UK (Becker, Bernd)
Date: Thu, 12 Nov 2009 12:37:16 -0000
Subject: Scalar Vector Graphics
Message-ID: <THU.12.NOV.2009.123716.0000.>

Hello,

What is the easiest way to produce SVG from grads?
Thanks,
Bernd.


--
Bernd Becker   Climate Impacts Product Development
Met Office Hadley Centre    FitzRoy Road  Exeter   Devon EX1 3PB  United
Kingdom
Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
E-mail:bernd.becker at metoffice.gov.uk -  http://www.metoffice.gov.uk


From matthew.thompson at NASA.GOV  Thu Nov 12 07:47:50 2009
From: matthew.thompson at NASA.GOV (Thompson,
 Matthew A. (GSFC-610.1)[SCIENCE APPLICATIONS INTL CORP])
Date: Thu, 12 Nov 2009 07:47:50 -0500
Subject: Scalar Vector Graphics
In-Reply-To: <E51EDFEBF10BE44BB4BDAF5FC2F024B9032EF0D4@EXXMAIL02.desktop.frd.metoffice.com>
Message-ID: <THU.12.NOV.2009.074750.0500.>

Becker, Bernd wrote:
> Hello,
>
> What is the easiest way to produce SVG from grads?
> Thanks,
> Bernd.

If you are using OpenGrADS, GxYat is best:

http://opengrads.org/wiki/index.php?title=Gxyat

With it, SVG is simple to make within grads:

   ga> gxyat image.svg

gxyat will likewise produce PNG, PDF, and PS output with nicely
antialiased fonts.  If you don't have OpenGrADS, you can find out more
about installing it here:

http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle

Matt
--
Matthew Thompson, SAIC, Sr Scientific Software Engr
NASA GSFC,  Global Modeling and Assimilation Office
Code 610.1, 8800 Greenbelt Rd, Greenbelt, MD  20771
Phone: 301-614-6712               Fax: 301-614-6246


From Wesley.Ebisuzaki at NOAA.GOV  Thu Nov 12 10:01:36 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Thu, 12 Nov 2009 10:01:36 -0500
Subject: Meaning of descriptor file (*.ctl) variable names
In-Reply-To: <5ECF940F4DDB46B69118AD847D06778B@trsspa.it>
Message-ID: <THU.12.NOV.2009.100136.0500.>

Diego,

Sometimes a variable may be available as a vertical profile. Sometimes a
variable may only be available on
one or two levels. When a variable is available as a vertical profile on
pressure surfaces, the suffix "prs" is
used. If the variable is not available on a vertical profile, the suffix
is the level descriptor.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
> variables having the suffix ?mb?. These variables are relative to an
> isobaric level type (value 100 in the PDS grib section, octet number
> 10), with a value expressed in hPa.
>
> I see that the variables with suffix prs are relative also to an
> isobaric level type.
>
> My questions is to know what is the difference between the variable
> with suffix mb and those with suffix prs.
>
> Here there is an example of a descriptor file:
>
> --------------------------------------------------------------------------------------------------------------------------
>
>
> dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
>
> undef 9.999E+20
>
> title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> * produced by grib2ctl v0.9.12.5p45
>
> dtype grib 255
>
> options yrev
>
> ydef 66 linear 10.000000 1
>
> xdef 126 linear -60.000000 1.000000
>
> tdef 1 linear 12Z18jul2009 1mo
>
> * z has 6 levels, for prs
>
> zdef 6 levels
>
> 925 850 700 500 400 300
>
> vars 2
>
> * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
>
> * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
>
> ENDVARS
>
> --------------------------------------------------------------------------------------------------------------------------
>
>
> Regards,
>
> Diego
>


From wlz at TEA.AC.CN  Thu Nov 12 10:33:56 2009
From: wlz at TEA.AC.CN (Wang Lizhi)
Date: Thu, 12 Nov 2009 23:33:56 +0800
Subject: How to use aave with time-interval
Message-ID: <THU.12.NOV.2009.233356.0800.>

Hi, everyone,

I get the ncep2 data set(example flx.ft06.200909), and I can plot a region's average
temperature curve use following:

open flx.ft06.200909.ctl
set t 1 120
define v=aave( tmp2m, lon=110,lon=120,lat=20,lat=30)
set x 1
set y 1
set z 1
d v

But the curve is plotted at interval 6hour. Now I want to plot the mean daily
temperature curve, How can I do ?

thanks


From dasilva at ALUM.MIT.EDU  Thu Nov 12 10:36:20 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Thu, 12 Nov 2009 10:36:20 -0500
Subject: Another free shapefile for world maps
In-Reply-To: <F367071F539DC64FB75E7D7690B8160DDCA70AEB50@EXVMBX003-2.exch003intermedia.net>
Message-ID: <THU.12.NOV.2009.103620.0500.>

On Thu, Nov 12, 2009 at 9:05 AM, Huddleston, John <
Huddleston at cira.colostate.edu> wrote:

>  Arlindo,
>
>
>
> Please excuse this direct email to you, the GrADS email list does not allow
> me to reply or send anything to the list.
>
>
>
> I downloaded the world.tar.bz2 file and it does not contain a PRJ file.
> While the three DBF, SHP, and SHX files conform exactly to the ESRI 1994
> shapefile standard; the accuracy and precision of our software has increased
> significantly since the standard was propagated.
>
>
>
> As such, it is important to know the projection of the world maps.
>
>
You may need to contact the data producers directly about this, it should be
a simple matter to add a standard .prj file. However, on the website it
says:

The data is based upon a free map published by TerraSpace,
Russia<http://www.terraspace.ru/> as
referenced by Geocommunity<http://data.geocomm.com/editorspicks/data_world11.html>.
I added Antarctica after Curt Mills pointed out that there was a missing
continent. Antartica's data came from the Digital Chart of the World and was
reprojected into NAD27 to agree with the rest of the world.


I am not sure what NAD27 is, but I was assuming it was a standard
projection. Let me know if you find anything.

         Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From diego.morelli at TRS.IT  Thu Nov 12 10:48:52 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Thu, 12 Nov 2009 16:48:52 +0100
Subject: R: Meaning of descriptor file (*.ctl) variable names
In-Reply-To: <4AFC2350.9030109@noaa.gov>
Message-ID: <THU.12.NOV.2009.164852.0100.>

Ok, thank you!!!
It's clear now.

Diego

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: gioved? 12 novembre 2009 16.02
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: Meaning of descriptor file (*.ctl) variable names

Diego,

Sometimes a variable may be available as a vertical profile. Sometimes a
variable may only be available on
one or two levels. When a variable is available as a vertical profile on
pressure surfaces, the suffix "prs" is
used. If the variable is not available on a vertical profile, the suffix
is the level descriptor.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
> variables having the suffix ?mb?. These variables are relative to an
> isobaric level type (value 100 in the PDS grib section, octet number
> 10), with a value expressed in hPa.
>
> I see that the variables with suffix prs are relative also to an
> isobaric level type.
>
> My questions is to know what is the difference between the variable
> with suffix mb and those with suffix prs.
>
> Here there is an example of a descriptor file:
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
>
> undef 9.999E+20
>
> title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> * produced by grib2ctl v0.9.12.5p45
>
> dtype grib 255
>
> options yrev
>
> ydef 66 linear 10.000000 1
>
> xdef 126 linear -60.000000 1.000000
>
> tdef 1 linear 12Z18jul2009 1mo
>
> * z has 6 levels, for prs
>
> zdef 6 levels
>
> 925 850 700 500 400 300
>
> vars 2
>
> * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
>
> * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
>
> ENDVARS
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> Regards,
>
> Diego
>


From jdduda at IASTATE.EDU  Thu Nov 12 10:53:57 2009
From: jdduda at IASTATE.EDU (Jeffrey Duda)
Date: Thu, 12 Nov 2009 09:53:57 -0600
Subject: How to use aave with time-interval
In-Reply-To: <20091112153336.M3912@tea.ac.cn>
Message-ID: <THU.12.NOV.2009.095357.0600.>

You could try nesting the aave command inside a tmave command, but you'd
have to create a mask for it.  See the index page for tmave (
http://www.iges.org/grads/gadoc/gadocindex.html).

Jeff Duda

2009/11/12 Wang Lizhi <wlz at tea.ac.cn>

> Hi, everyone,
>
> I get the ncep2 data set(example flx.ft06.200909), and I can plot a
> region's average
> temperature curve use following:
>
> open flx.ft06.200909.ctl
> set t 1 120
> define v=aave( tmp2m, lon=110,lon=120,lat=20,lat=30)
> set x 1
> set y 1
> set z 1
> d v
>
> But the curve is plotted at interval 6hour. Now I want to plot the mean
> daily
> temperature curve, How can I do ?
>
> thanks
>



--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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From rana.samuels at GMAIL.COM  Thu Nov 12 10:58:46 2009
From: rana.samuels at GMAIL.COM (Rana Samuels)
Date: Thu, 12 Nov 2009 17:58:46 +0200
Subject: UNSUBSCRIBE
Message-ID: <THU.12.NOV.2009.175846.0200.>

Please unsubscribe me.

On Thu, Nov 12, 2009 at 5:48 PM, Diego Morelli <diego.morelli at trs.it> wrote:

> Ok, thank you!!!
> It's clear now.
>
> Diego
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: gioved? 12 novembre 2009 16.02
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Meaning of descriptor file (*.ctl) variable names
>
> Diego,
>
> Sometimes a variable may be available as a vertical profile. Sometimes a
> variable may only be available on
> one or two levels. When a variable is available as a vertical profile on
> pressure surfaces, the suffix "prs" is
> used. If the variable is not available on a vertical profile, the suffix
> is the level descriptor.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
> >
> > When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
> > variables having the suffix ?mb?. These variables are relative to an
> > isobaric level type (value 100 in the PDS grib section, octet number
> > 10), with a value expressed in hPa.
> >
> > I see that the variables with suffix prs are relative also to an
> > isobaric level type.
> >
> > My questions is to know what is the difference between the variable
> > with suffix mb and those with suffix prs.
> >
> > Here there is an example of a descriptor file:
> >
> >
>
> ----------------------------------------------------------------------------
> ----------------------------------------------
> >
> >
> > dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
> >
> > index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
> >
> > undef 9.999E+20
> >
> > title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
> >
> > * produced by grib2ctl v0.9.12.5p45
> >
> > dtype grib 255
> >
> > options yrev
> >
> > ydef 66 linear 10.000000 1
> >
> > xdef 126 linear -60.000000 1.000000
> >
> > tdef 1 linear 12Z18jul2009 1mo
> >
> > * z has 6 levels, for prs
> >
> > zdef 6 levels
> >
> > 925 850 700 500 400 300
> >
> > vars 2
> >
> > * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
> >
> > * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
> >
> > ENDVARS
> >
> >
>
> ----------------------------------------------------------------------------
> ----------------------------------------------
> >
> >
> > Regards,
> >
> > Diego
> >
>
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From Wesley.Ebisuzaki at NOAA.GOV  Thu Nov 12 11:00:06 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Thu, 12 Nov 2009 11:00:06 -0500
Subject: OpenDAP GRIB Retrieval from Nomads
In-Reply-To: <2DEC7A7E70284A658C14AC247A5745D5@sailfish>
Message-ID: <THU.12.NOV.2009.110006.0500.>

Mark,

    http://nomads.ncep.noaa.gov is the operational NCEP nomads site.
Since you
want a regional subset, I am assuming that you want to minimize
time/bandwidth.
Downloading grib2 is good because grib-2 is compressed data. You will
save time
over DODS which transfers the data as a text file. You will also save
time because
GDS has considerable overhead on the server.   Once you have obtained
the grib-2 data,
you can use g2ctl to create the control file.

Example of grib2 compression:
   1x1 degree GFS hgt 500mb:  4.6 bits per grid point
    text file: several characters per grid point.

Two ways to download the grib data.

   (1) downloading the appropriate grib fields by partial http downloading.

http://www.cpc.noaa.gov/products/wesley/fast_downloading_grib.html
            http://www.cpc.noaa.gov/products/wesley/get_gfs.html
          use "http" option to find the URLs.  See the main page
(http://nomads.ncep.noaa.gov)

    (2) creating regional subsets of the grib2 files, use "grib filter"
(aka g2sub) from
       the main page.

            Wesley Ebisuzaki


Mark Hess wrote:
> All,
>
> I tried to search the GRADSUSR archives for the answer to this
> question, but it gives me the error errno=146 "unable to initiate
> communication...".  Perhaps you all can offer an answer.
>
> Does anyone have any sample strings for use with gradsdods to retreive
> a GFS grib file from the NWS NCEP MOMANDS OpenDAP server?
> (http://nomads.ncep.noaa.gov:9090/dods/gfs)
>
> I'm especially interested in how to extract data for a specified
> geographical region.
>
> If anyone can get me started with this, I should be able to take an
> example and work from there.
>
> Thank you.
>
> Mark
>


From Huddleston at CIRA.COLOSTATE.EDU  Thu Nov 12 10:52:45 2009
From: Huddleston at CIRA.COLOSTATE.EDU (Huddleston, John)
Date: Thu, 12 Nov 2009 07:52:45 -0800
Subject: Another free shapefile for world maps
In-Reply-To: <77fcd6b20911120736r73a8669ch3c61967975859b6@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.075245.0800.>

Arlindo, here is a list of projections for Antartica:

$ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/Antarctica/
Australian Antarctic 1998.prj  Deception Island.prj  Pointe Geologie Perroud 1950.prj
Camp Area Astro.prj            Petrels 1972.prj

The NAD27 is North America Datum of 1927 and is, in general, not a good choice for projections of the world. The original maps that USGS created for the United States were based on NAD27 and the CLARK1866 sphere and they have been re-projected by USGS to NAD83 and the GRS80 sphere.

Projections for the world would fall into one of two categories: Geographic and Projected.

 $ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/World/
ITRF 1988.prj  ITRF 1991.prj  ITRF 1994.prj  ITRF 2000.prj  WGS 1966.prj
ITRF 1989.prj  ITRF 1992.prj  ITRF 1996.prj  ITRF 2005.prj  WGS 1972 TBE.prj
ITRF 1990.prj  ITRF 1993.prj  ITRF 1997.prj  NSWC 9Z-2.prj  WGS 1972.prj and WGS 1984.prj

and

$ ls Coordinate\ Systems/Projected\ Coordinate\ Systems/world
Aitoff (world).prj                   Flat Polar Quartic (world).prj  Sinusoidal (world).prj
Behrmann (world).prj                 Fuller (world).prj              Sphere-based
Bonne (world).prj                    Gall Stereographic (world).prj  The World from Space.prj
Craster Parabolic (world).prj        Goode Homolosine (Land).prj     Times (world).prj
Cube (world).prj                     Goode Homolosine (Ocean).prj    Van der Grinten I (world).prj
Cylindrical Equal Area (world).prj   Hammer-Aitoff (world).prj       Vertical Perspective (world).prj
Eckert I (world).prj                 Loximuthal (world).prj          WGS 1984 PDC Mercator.prj
Eckert II (world).prj                Mercator (world).prj            WGS 1984 Web Mercator (Auxiliary Sphere).prj
Eckert III (world).prj               Miller Cylindrical (world).prj  WGS 1984 Web Mercator.prj
Eckert IV (world).prj                Mollweide (world).prj           Winkel I (world).prj
Eckert V (world).prj                 Plate Carree (world).prj        Winkel II (world).prj
Eckert VI (world).prj                Polyconic (world).prj           Winkel Tripel (NGS - world).prj
Equidistant Conic (world).prj        Quartic Authalic (world).prj
Equidistant Cylindrical (world).prj  Robinson (world).prj

John

John Huddleston, PhD
Research Associate
Cooperative Institute for Research in the Atmosphere
Mail Stop 1375 @ CIRA
Colorado State University
Fort Collins, CO 80521
970-491-8602

From: arlindo.dasilva at gmail.com [mailto:arlindo.dasilva at gmail.com] On Behalf Of Arlindo da Silva
Sent: Thursday, November 12, 2009 8:36 AM
To: Huddleston, John
Cc: gradsusr
Subject: Re: Another free shapefile for world maps

On Thu, Nov 12, 2009 at 9:05 AM, Huddleston, John <Huddleston at cira.colostate.edu<mailto:Huddleston at cira.colostate.edu>> wrote:
Arlindo,

Please excuse this direct email to you, the GrADS email list does not allow me to reply or send anything to the list.

I downloaded the world.tar.bz2 file and it does not contain a PRJ file. While the three DBF, SHP, and SHX files conform exactly to the ESRI 1994 shapefile standard; the accuracy and precision of our software has increased significantly since the standard was propagated.

As such, it is important to know the projection of the world maps.

You may need to contact the data producers directly about this, it should be a simple matter to add a standard .prj file. However, on the website it says:

The data is based upon a free map published by TerraSpace, Russia<http://www.terraspace.ru/> as referenced by Geocommunity<http://data.geocomm.com/editorspicks/data_world11.html>. I added Antarctica after Curt Mills pointed out that there was a missing continent. Antartica's data came from the Digital Chart of the World and was reprojected into NAD27 to agree with the rest of the world.

I am not sure what NAD27 is, but I was assuming it was a standard projection. Let me know if you find anything.

         Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu<mailto:dasilva at alum.mit.edu>
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From jmssnyder at UCDAVIS.EDU  Thu Nov 12 11:18:17 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Thu, 12 Nov 2009 08:18:17 -0800
Subject: How to use aave with time-interval
In-Reply-To: <20091112153336.M3912@tea.ac.cn>
Message-ID: <THU.12.NOV.2009.081817.0800.>

I think for 6 hour day, I would try define
v=ave(aave(tmp2m,lon=110,lon=120,lat=20,lat=30),t+0,t=4).

Look at this website for more information.

http://www.iges.org/grads/gadoc/variable.html#new

-Jason

2009/11/12 Wang Lizhi <wlz at tea.ac.cn>

> Hi, everyone,
>
> I get the ncep2 data set(example flx.ft06.200909), and I can plot a
> region's average
> temperature curve use following:
>
> open flx.ft06.200909.ctl
> set t 1 120
> define v=aave( tmp2m, lon=110,lon=120,lat=20,lat=30)
> set x 1
> set y 1
> set z 1
> d v
>
> But the curve is plotted at interval 6hour. Now I want to plot the mean
> daily
> temperature curve, How can I do ?
>
> thanks
>
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From mike.bosilovich at GMAIL.COM  Thu Nov 12 11:25:06 2009
From: mike.bosilovich at GMAIL.COM (Mike Bosilovich)
Date: Thu, 12 Nov 2009 11:25:06 -0500
Subject: OpenDAP GRIB Retrieval from Nomads
In-Reply-To: <2DEC7A7E70284A658C14AC247A5745D5@sailfish>
Message-ID: <THU.12.NOV.2009.112506.0500.>

Hi Mark,

Your question reminded me of some new regridding functionality that
Arlindo told me about that I've been meaning to test drive. Looks like
you want grib files, but this can also do netcdf (and there maybe some
compressed netcdf too).

I run the following command line on my linux workstation with the
latest OpenGrads build installed

lats4d.sh -i http://nomad3.ncep.noaa.gov:9090/dods/reanalyses/reanalysis-2/6hr/flx/flx
-o testout2 -format grads_grib -time 00Z01OCT2009 00Z02OCT2009 -vars
cpratsfc pratesfc -merra0.5

This produces a grib file on my workstation for the convective and
total precip from R2  (I'll assume GFS's GDS will behave similarly).
for 5 6-hourly intervals for the time specified. the -merra0.5 flag
regrids the output to the MERRA reanalysis 1/2 degree native grid.
(this was just a test, I wouldn't regularly upscale coarser resolution
data that way)

This could be build into a csh script for looping. more variables can
be added, -lat and -lon can subset the domain, and -func could make
means or apply other grads functions. It slices, it dices.....

I hope this helps

Mike

On 11/11/09, Mark Hess <mhess at oceani.com> wrote:
> All,
>
> I tried to search the GRADSUSR archives for the answer to this question, but
> it gives me the error errno=146 "unable to initiate communication...".
> Perhaps you all can offer an answer.
>
> Does anyone have any sample strings for use with gradsdods to retreive a GFS
> grib file from the NWS NCEP MOMANDS OpenDAP server?
> (http://nomads.ncep.noaa.gov:9090/dods/gfs)
>
> I'm especially interested in how to extract data for a specified
> geographical region.
>
> If anyone can get me started with this, I should be able to take an example
> and work from there.
>
> Thank you.
>
> Mark
>


From jmssnyder at UCDAVIS.EDU  Thu Nov 12 11:32:53 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Thu, 12 Nov 2009 17:32:53 +0100
Subject: Making composites of data for specific OLR values within an
 certain area
Message-ID: <THU.12.NOV.2009.173253.0100.>

I am trying to make a script that composites pressure values from dates
when OLR values over a certain area (latitude range: 5S to 5N and
longitude: 120E and 120W) are below a certain value.  I tried using this
script and it did not seem to work properly.  What should I do to make
this script so that I can make this script work properly?  Also how can I
composite wind data at specific pressure levels such as 850 mb and 500 mb
based on this script?
'sdfopen olr.day.mean.nc'
'sdfopen pres.sfc.1993.nc'
'set t 6790'
'define presa = 0'
'define number = 0'
count = 6790
while (count < 12267)
  'set t 'count
  'define olra = aave(olr,lon=120,lon=240,lat=-5,lat=5)'
  if (olra < 230)
     'define presb = pres.2'
     'define n=1'
  else
     'define presb = 0'
     'define n = 0'
  endif
'define presa = presa + presb'
'define number = number + n'
count = count + 1
endwhile
'define presavg=presa'


If someone has any suggestions on what to do with this script to make it
composite wind/pressure data for days where the average OLR values within
the area 120 W to 120 E and 15S to 15N, is less than 234, that would be
greatly appreciated.

Thanks,

Jason


From robert.mulloy at SHELL.COM  Thu Nov 12 11:21:35 2009
From: robert.mulloy at SHELL.COM (Robert Mulloy)
Date: Thu, 12 Nov 2009 10:21:35 -0600
Subject: unsubscribe
In-Reply-To: <fe8efa00911120818h4e951fc4oe5e7906ed3b79c32@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.102135.0600.>

unsubscribe please
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From matt.alonso at GMAIL.COM  Thu Nov 12 12:00:24 2009
From: matt.alonso at GMAIL.COM (Matt Alonso)
Date: Thu, 12 Nov 2009 12:00:24 -0500
Subject: INSTRUCTIONS FOR UNSUBSCRIBING...AGAIN
Message-ID: <THU.12.NOV.2009.120024.0500.>

How hard is it to read the instructions for subscribing/unsubscribing -
which you must have read at some point or you wouldn't be on this list to
begin with - or to read the instructions Jennifer sent out to the entire
list 3 days ago?  Here they are again.

To unsubscribe, DO NOT send a request to gradsusr at list.cineca.it, please do
the following:

Send an email containing the message "SIGNOFF GRADSUSR" to
listserv at list.cineca.it
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From rana.samuels at GMAIL.COM  Thu Nov 12 12:06:26 2009
From: rana.samuels at GMAIL.COM (Rana Samuels)
Date: Thu, 12 Nov 2009 19:06:26 +0200
Subject: INSTRUCTIONS FOR UNSUBSCRIBING...AGAIN
In-Reply-To: <6cc1fd310911120900u767f48adnf7ad7e7b41ffa5cf@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.190626.0200.>

That's what I did. It doesnt work!!!!

On Thu, Nov 12, 2009 at 7:00 PM, Matt Alonso <matt.alonso at gmail.com> wrote:

> How hard is it to read the instructions for subscribing/unsubscribing -
> which you must have read at some point or you wouldn't be on this list to
> begin with - or to read the instructions Jennifer sent out to the entire
> list 3 days ago?  Here they are again.
>
> To unsubscribe, DO NOT send a request to gradsusr at list.cineca.it, please
> do the following:
>
> Send an email containing the message "SIGNOFF GRADSUSR" to
> listserv at list.cineca.it
>
>
>
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From matt.alonso at GMAIL.COM  Thu Nov 12 12:14:18 2009
From: matt.alonso at GMAIL.COM (Matt Alonso)
Date: Thu, 12 Nov 2009 12:14:18 -0500
Subject: INSTRUCTIONS FOR UNSUBSCRIBING...AGAIN
In-Reply-To: <9ac5681b0911120906qbae76fevd6de6abd907f8abe@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.121418.0500.>

Haha, well that certainly sucks.  My apologies, I've never had to do that.
Jennifer, any ideas?

On Thu, Nov 12, 2009 at 12:06 PM, Rana Samuels <rana.samuels at gmail.com>wrote:

> That's what I did. It doesnt work!!!!
>
>
> On Thu, Nov 12, 2009 at 7:00 PM, Matt Alonso <matt.alonso at gmail.com>wrote:
>
>> How hard is it to read the instructions for subscribing/unsubscribing -
>> which you must have read at some point or you wouldn't be on this list to
>> begin with - or to read the instructions Jennifer sent out to the entire
>> list 3 days ago?  Here they are again.
>>
>> To unsubscribe, DO NOT send a request to gradsusr at list.cineca.it, please
>> do the following:
>>
>> Send an email containing the message "SIGNOFF GRADSUSR" to
>> listserv at list.cineca.it
>>
>>
>>
>
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From jma at COLA.IGES.ORG  Thu Nov 12 12:18:02 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Thu, 12 Nov 2009 12:18:02 -0500
Subject: INSTRUCTIONS FOR UNSUBSCRIBING...AGAIN
In-Reply-To: <9ac5681b0911120906qbae76fevd6de6abd907f8abe@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.121802.0500.>

If 'signoff gradsusr' to listserve at list.cineca.it doesn't work, then
send your unsubscribe request to gradsusr-request at list.cineca.it
instead. The list owners can help you, the list subscribers cannot. --
Jennifer


On Nov 12, 2009, at 12:06 PM, Rana Samuels wrote:

> That's what I did. It doesnt work!!!!
>
> On Thu, Nov 12, 2009 at 7:00 PM, Matt Alonso <matt.alonso at gmail.com>
> wrote:
> How hard is it to read the instructions for subscribing/
> unsubscribing - which you must have read at some point or you
> wouldn't be on this list to begin with - or to read the instructions
> Jennifer sent out to the entire list 3 days ago?  Here they are again.
>
> To unsubscribe, DO NOT send a request to gradsusr at list.cineca.it,
> please do the following:
>
> Send an email containing the message "SIGNOFF GRADSUSR" to listserv at list.cineca.it
>
>
>

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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From Charles.Seman at NOAA.GOV  Thu Nov 12 13:05:10 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Thu, 12 Nov 2009 13:05:10 -0500
Subject: compositing wind and pressure data based on certain OLR values
In-Reply-To: <20091110200646.340F120036@mx2.cineca.it>
Message-ID: <THU.12.NOV.2009.130510.0500.>

Jason,

Perhaps the "fndlvl" function may be helpful to define a "mask" which
then could be used with "maskout"?  The maskout web site has an example
of averaging only over land using a "mask"...
http://grads.iges.org/grads/gadoc/gradfuncfndlvl.html
http://grads.iges.org/grads/gadoc/gradfuncmaskout.html

Chuck

Jason Snyder wrote:
> I am trying to make a script that composites pressure values from dates
> when OLR values over a certain area (latitude range: 5S to 5N and
> longitude: 120E and 120W) are below a certain value.  I tried using this
> script and it did not seem to work properly.  What should I do to make
> this script so that I can make this script work properly?  Also how can I
> composite wind data at specific pressure levels such as 850 mb and 500 mb
> based on this script?
> 'sdfopen olr.day.mean.nc'
> 'sdfopen pres.sfc.1993.nc'
> 'set t 6790'
> 'define presa = 0'
> 'define number = 0'
> count = 6790
> while (count < 12267)
>    'set t 'count
>    'define olra = aave(olr,lon=120,lon=240,lat=-5,lat=5)'
>    if (olra < 230)
>       'define presb = pres.2'
>       'define n=1'
>    else
>       'define presb = 0'
>       'define n = 0'
>    endif
> 'define presa = presa + presb'
> 'define number = number + n'
> count = count + 1
> endwhile
> 'define presavg=presa'
>
>
> If someone has any suggestions on what to do with this script to make it
> composite wind/pressure data for days where the average OLR values within
> the area 120 W to 120 E and 15S to 15N, is less than 234, that would be
> greatly appreciated.
>
> Thanks,
>
> Jason
> -Jason
>

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."


From jimp at HAWAII.EDU  Thu Nov 12 13:05:18 2009
From: jimp at HAWAII.EDU (James T. Potemra)
Date: Thu, 12 Nov 2009 08:05:18 -1000
Subject: OpenDAP GRIB Retrieval from Nomads
In-Reply-To: <2DEC7A7E70284A658C14AC247A5745D5@sailfish>
Message-ID: <THU.12.NOV.2009.080518.1000.>

Hi Mark:

Should be pretty straightforward.  Just follow the link you give below
and you should see a list of the GDS catalog at nomads (the listing has
names like gfs20091101).  Select whichever date in which you are
interested, and you should see a page with the data set catalog.  For
example, I just clicked on the top one gfs20091014 and got a list with
gfs_00z, gfs_00z_anl, etc.  Again, pick the one of interest and click on
the "info" link.  E.g., I clicked on the "info" link next to gfs_00z
(the direct URL is
http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z.info).
All you need is the "OPeNDAP/DODS Data URL" listed at the top, again in
this case it is
http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
(Note here that you can't always assume the syntax of the DODS Data URL
will be similar to the catalog URL, but in this case it happens to be).
So, now all you need to do is fire up GrADS (or gradsdods depending on
your binary version), then type in "sdfopen xxx" where "xxx" is the DODS
data URL from above.  You should then have total access to the data set,
at which point you'll first be amazed at the simplicity with which you
can access data without actually having to transfer/reformat/etc., and
then you'll be looking for a way to thank all the brilliant minds that
provide us with this capability.  The final step, if you really want to
download, is just "set lat ...", "set lon...", "set lev...", "set
time..", "set gxout fwrite" and "d variable".

Jim

PS.  Here's what it looks like for the sample file:

grads -l

              Welcome to the OpenGrADS Bundle Distribution
              --------------------------------------------

For additional information enter "grads -h".

Starting
"/usr/local/grads-2.0.a7.oga.2/Contents/Linux/Versions/2.0.a7.oga.2/x86_64/grads
-l " ...


Grid Analysis and Display System (GrADS) Version 2.0.a7.oga.2
Copyright (c) 1988-2008 by Brian Doty and the
Institute for Global Environment and Society (IGES)
GrADS comes with ABSOLUTELY NO WARRANTY
See file COPYRIGHT for more information

Config: v2.0.a7.oga.2 little-endian readline printim grib2 netcdf
hdf4-sds hdf5 opendap-grids,stn athena geotiff
Issue 'q config' command for more information.
Loading User Defined Extensions table
</usr/local/grads-2.0.a7.oga.2/Contents/Linux/Versions/2.0.a7.oga.2/x86_64/gex/udxt>
... ok.
GX Package Initialization: Size = 11 8.5
ga-> sdfopen http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
Scanning self-describing file:
http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
SDF file http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
is open as file 1
LON set to 0 360
LAT set to -90 90
LEV set to 1000 1000
Time values set: 2009:10:14:0 2009:10:14:0
E set to 1 1
ga-> q file
File 1 : GFS fcst starting from 00Z14oct2009, downloaded Oct 14 04:24 UTC
  Descriptor: http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  Binary: http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  Type = Gridded
  Xsize = 360  Ysize = 181  Zsize = 26  Tsize = 61  Esize = 1
  Number of Variables = 139
     absvprs  26  t,z,y,x  ** (1000 975 950 925 900.. 70 50 30 20 10)
none absolute vorticity [1/s]
     no4lftxsfc  0  t,y,x  ** surface none best (4 layer) lifted index [k]
     no5wava500mb  0  t,y,x  ** 500 mb none 5-wave geopotential height
anomaly [gpm]
     no5wavh500mb  0  t,y,x  ** 500 mb none 5-wave geopotential height
[gpm]
....

ga-> set lat -90 90
LAT set to -90 90
ga-> set lon 130 150
LON set to 130 150
ga-> set t 1
Time values set: 2009:10:14:0 2009:10:14:0
ga-> set z 1
LEV set to 1000 1000
ga-> set gxout fwrite
ga-> d ugrdprs
Wrote 3801 of 3801 elements to grads.fwrite as Stream Little_Endian



Mark Hess wrote:
> All,
>
> I tried to search the GRADSUSR archives for the answer to this
> question, but it gives me the error errno=146 "unable to initiate
> communication...".  Perhaps you all can offer an answer.
>
> Does anyone have any sample strings for use with gradsdods to retreive
> a GFS grib file from the NWS NCEP MOMANDS OpenDAP server?
> (http://nomads.ncep.noaa.gov:9090/dods/gfs)
>
> I'm especially interested in how to extract data for a specified
> geographical region.
>
> If anyone can get me started with this, I should be able to take an
> example and work from there.
>
> Thank you.
>
> Mark
>


From mhess at OCEANI.COM  Thu Nov 12 13:15:01 2009
From: mhess at OCEANI.COM (Mark Hess)
Date: Thu, 12 Nov 2009 11:15:01 -0700
Subject: OpenDAP GRIB Retrieval from Nomads
In-Reply-To: <4AFC4E5E.3060204@hawaii.edu>
Message-ID: <THU.12.NOV.2009.111501.0700.>

Jim,

Excellent!  That is more than enough to get me started.  Thanks very much for the detailed explanation and sample - very helpful for a GrADS/OpenDAP rookie like myself!

Mark

  ----- Original Message ----- 
  From: James T. Potemra 
  To: GRADSUSR at LIST.CINECA.IT 
  Sent: Thursday, November 12, 2009 11:05 AM
  Subject: Re: OpenDAP GRIB Retrieval from Nomads


  Hi Mark:

  Should be pretty straightforward.  Just follow the link you give below
  and you should see a list of the GDS catalog at nomads (the listing has
  names like gfs20091101).  Select whichever date in which you are
  interested, and you should see a page with the data set catalog.  For
  example, I just clicked on the top one gfs20091014 and got a list with
  gfs_00z, gfs_00z_anl, etc.  Again, pick the one of interest and click on
  the "info" link.  E.g., I clicked on the "info" link next to gfs_00z
  (the direct URL is
  http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z.info).
  All you need is the "OPeNDAP/DODS Data URL" listed at the top, again in
  this case it is
  http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  (Note here that you can't always assume the syntax of the DODS Data URL
  will be similar to the catalog URL, but in this case it happens to be).
  So, now all you need to do is fire up GrADS (or gradsdods depending on
  your binary version), then type in "sdfopen xxx" where "xxx" is the DODS
  data URL from above.  You should then have total access to the data set,
  at which point you'll first be amazed at the simplicity with which you
  can access data without actually having to transfer/reformat/etc., and
  then you'll be looking for a way to thank all the brilliant minds that
  provide us with this capability.  The final step, if you really want to
  download, is just "set lat ...", "set lon...", "set lev...", "set
  time..", "set gxout fwrite" and "d variable".

  Jim

  PS.  Here's what it looks like for the sample file:

  grads -l

                Welcome to the OpenGrADS Bundle Distribution
                --------------------------------------------

  For additional information enter "grads -h".

  Starting
  "/usr/local/grads-2.0.a7.oga.2/Contents/Linux/Versions/2.0.a7.oga.2/x86_64/grads
  -l " ...


  Grid Analysis and Display System (GrADS) Version 2.0.a7.oga.2
  Copyright (c) 1988-2008 by Brian Doty and the
  Institute for Global Environment and Society (IGES)
  GrADS comes with ABSOLUTELY NO WARRANTY
  See file COPYRIGHT for more information

  Config: v2.0.a7.oga.2 little-endian readline printim grib2 netcdf
  hdf4-sds hdf5 opendap-grids,stn athena geotiff
  Issue 'q config' command for more information.
  Loading User Defined Extensions table
  </usr/local/grads-2.0.a7.oga.2/Contents/Linux/Versions/2.0.a7.oga.2/x86_64/gex/udxt>
  ... ok.
  GX Package Initialization: Size = 11 8.5
  ga-> sdfopen http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  Scanning self-describing file:
  http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  SDF file http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
  is open as file 1
  LON set to 0 360
  LAT set to -90 90
  LEV set to 1000 1000
  Time values set: 2009:10:14:0 2009:10:14:0
  E set to 1 1
  ga-> q file
  File 1 : GFS fcst starting from 00Z14oct2009, downloaded Oct 14 04:24 UTC
    Descriptor: http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
    Binary: http://nomads.ncep.noaa.gov:9090/dods/gfs/gfs20091014/gfs_00z
    Type = Gridded
    Xsize = 360  Ysize = 181  Zsize = 26  Tsize = 61  Esize = 1
    Number of Variables = 139
       absvprs  26  t,z,y,x  ** (1000 975 950 925 900.. 70 50 30 20 10)
  none absolute vorticity [1/s]
       no4lftxsfc  0  t,y,x  ** surface none best (4 layer) lifted index [k]
       no5wava500mb  0  t,y,x  ** 500 mb none 5-wave geopotential height
  anomaly [gpm]
       no5wavh500mb  0  t,y,x  ** 500 mb none 5-wave geopotential height
  [gpm]
  ....

  ga-> set lat -90 90
  LAT set to -90 90
  ga-> set lon 130 150
  LON set to 130 150
  ga-> set t 1
  Time values set: 2009:10:14:0 2009:10:14:0
  ga-> set z 1
  LEV set to 1000 1000
  ga-> set gxout fwrite
  ga-> d ugrdprs
  Wrote 3801 of 3801 elements to grads.fwrite as Stream Little_Endian



  Mark Hess wrote:
  > All,
  >
  > I tried to search the GRADSUSR archives for the answer to this
  > question, but it gives me the error errno=146 "unable to initiate
  > communication...".  Perhaps you all can offer an answer.
  >
  > Does anyone have any sample strings for use with gradsdods to retreive
  > a GFS grib file from the NWS NCEP MOMANDS OpenDAP server?
  > (http://nomads.ncep.noaa.gov:9090/dods/gfs)
  >
  > I'm especially interested in how to extract data for a specified
  > geographical region.
  >
  > If anyone can get me started with this, I should be able to take an
  > example and work from there.
  >
  > Thank you.
  >
  > Mark
  >
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From fernandez1 at CANTV.NET  Thu Nov 12 13:24:22 2009
From: fernandez1 at CANTV.NET (Luis Alfonso Fernández H.)
Date: Thu, 12 Nov 2009 13:54:22 -0430
Subject: IT DOESN´T WORK "AGAIN"
Message-ID: <THU.12.NOV.2009.135422.0430.>

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From dasilva at ALUM.MIT.EDU  Thu Nov 12 14:56:12 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Thu, 12 Nov 2009 14:56:12 -0500
Subject: Another free shapefile for world maps
In-Reply-To: <F367071F539DC64FB75E7D7690B8160DDCA70AEB74@EXVMBX003-2.exch003intermedia.net>
Message-ID: <THU.12.NOV.2009.145612.0500.>

John,

    What is your recommendation? Should we reproject that free dataset for
general grads use? Are you setup for producing such a re-projected shapefile
with the corresponding .prj metadata?

    Thanks,

        Arlindo


On Thu, Nov 12, 2009 at 10:52 AM, Huddleston, John <
Huddleston at cira.colostate.edu> wrote:

>  Arlindo, here is a list of projections for Antartica:
>
>
>
> $ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/Antarctica/
>
> Australian Antarctic 1998.prj  Deception Island.prj  Pointe Geologie
> Perroud 1950.prj
>
> Camp Area Astro.prj            Petrels 1972.prj
>
>
>
> The NAD27 is North America Datum of 1927 and is, in general, not a good
> choice for projections of the world. The original maps that USGS created for
> the United States were based on NAD27 and the CLARK1866 sphere and they have
> been re-projected by USGS to NAD83 and the GRS80 sphere.
>
>
>
> Projections for the world would fall into one of two categories: Geographic
> and Projected.
>
>
>
>  $ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/World/
>
> ITRF 1988.prj  ITRF 1991.prj  ITRF 1994.prj  ITRF 2000.prj  WGS
> 1966.prj
>
> ITRF 1989.prj  ITRF 1992.prj  ITRF 1996.prj  ITRF 2005.prj  WGS 1972
> TBE.prj
>
> ITRF 1990.prj  ITRF 1993.prj  ITRF 1997.prj  NSWC 9Z-2.prj  WGS 1972.prj
> and WGS 1984.prj
>
>
>
> and
>
>
>
> $ ls Coordinate\ Systems/Projected\ Coordinate\ Systems/world
>
> Aitoff (world).prj                   Flat Polar Quartic (world).prj
> Sinusoidal (world).prj
>
> Behrmann (world).prj                 Fuller (world).prj
> Sphere-based
>
> Bonne (world).prj                    Gall Stereographic (world).prj  The
> World from Space.prj
>
> Craster Parabolic (world).prj        Goode Homolosine (Land).prj     Times
> (world).prj
>
> Cube (world).prj                     Goode Homolosine (Ocean).prj    Van
> der Grinten I (world).prj
>
> Cylindrical Equal Area (world).prj   Hammer-Aitoff (world).prj
> Vertical Perspective (world).prj
>
> Eckert I (world).prj                 Loximuthal (world).prj          WGS
> 1984 PDC Mercator.prj
>
> Eckert II (world).prj                Mercator (world).prj            WGS
> 1984 Web Mercator (Auxiliary Sphere).prj
>
> Eckert III (world).prj               Miller Cylindrical (world).prj  WGS
> 1984 Web Mercator.prj
>
> Eckert IV (world).prj                Mollweide (world).prj           Winkel
> I (world).prj
>
> Eckert V (world).prj                 Plate Carree (world).prj        Winkel
> II (world).prj
>
> Eckert VI (world).prj                Polyconic (world).prj           Winkel
> Tripel (NGS - world).prj
>
> Equidistant Conic (world).prj        Quartic Authalic (world).prj
>
> Equidistant Cylindrical (world).prj  Robinson (world).prj
>
>
>
> John
>
>
>
> John Huddleston, PhD
>
> Research Associate
>
> Cooperative Institute for Research in the Atmosphere
>
> Mail Stop 1375 @ CIRA
>
> Colorado State University
>
> Fort Collins, CO 80521
>
> 970-491-8602
>
>
>
> *From:* arlindo.dasilva at gmail.com [mailto:arlindo.dasilva at gmail.com] *On
> Behalf Of *Arlindo da Silva
> *Sent:* Thursday, November 12, 2009 8:36 AM
> *To:* Huddleston, John
> *Cc:* gradsusr
> *Subject:* Re: Another free shapefile for world maps
>
>
>
> On Thu, Nov 12, 2009 at 9:05 AM, Huddleston, John <
> Huddleston at cira.colostate.edu> wrote:
>
>  Arlindo,
>
>
>
> Please excuse this direct email to you, the GrADS email list does not allow
> me to reply or send anything to the list.
>
>
>
> I downloaded the world.tar.bz2 file and it does not contain a PRJ file.
> While the three DBF, SHP, and SHX files conform exactly to the ESRI 1994
> shapefile standard; the accuracy and precision of our software has increased
> significantly since the standard was propagated.
>
>
>
> As such, it is important to know the projection of the world maps.
>
>
>
> You may need to contact the data producers directly about this, it should
> be a simple matter to add a standard .prj file. However, on the website it
> says:
>
>
>
> The data is based upon a free map published by TerraSpace, Russia<http://www.terraspace.ru/> as
> referenced by Geocommunity<http://data.geocomm.com/editorspicks/data_world11.html>.
> I added Antarctica after Curt Mills pointed out that there was a missing
> continent. Antartica's data came from the Digital Chart of the World and was
> reprojected into NAD27 to agree with the rest of the world.
>
>
>
> I am not sure what NAD27 is, but I was assuming it was a standard
> projection. Let me know if you find anything.
>
>
>
>          Arlindo
>
>
>
> --
> Arlindo da Silva
> dasilva at alum.mit.edu
>



--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Thu Nov 12 15:05:28 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Thu, 12 Nov 2009 15:05:28 -0500
Subject: Making composites of data for specific OLR values within an
 certain area
In-Reply-To: <20091112163414.7D0DC1FDEE@mx2.cineca.it>
Message-ID: <THU.12.NOV.2009.150528.0500.>

On Thu, Nov 12, 2009 at 11:32 AM, Jason Snyder <jmssnyder at ucdavis.edu>wrote:

> I am trying to make a script that composites pressure values from dates
> when OLR values over a certain area (latitude range: 5S to 5N and
> longitude: 120E and 120W) are below a certain value.  I tried using this
> script and it did not seem to work properly.  What should I do to make
> this script so that I can make this script work properly?  Also how can I
> composite wind data at specific pressure levels such as 850 mb and 500 mb
> based on this script?
> 'sdfopen olr.day.mean.nc'
> 'sdfopen pres.sfc.1993.nc'
> 'set t 6790'
> 'define presa = 0'
> 'define number = 0'
> count = 6790
> while (count < 12267)
>  'set t 'count
>  'define olra = aave(olr,lon=120,lon=240,lat=-5,lat=5)'
>  if (olra < 230)
>

This is not valid. Grads scripting does not have access to defined
variables, grads scripts  operate on a separate namespace from the
expression parser. However, the bjt extensions have a if() function that
could be used to implement this:

ga-> define presb = if(olra<230,pres.2,0.0)

Function maskout() can accomplished much of the same, but I find the if()
syntax easier to read. More information on the bjt extensions here:

    http://opengrads.org/doc/udxt/libbjt/

    Arlindo


--
Arlindo da Silva
dasilva at alum.mit.edu
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From Huddleston at CIRA.COLOSTATE.EDU  Thu Nov 12 15:11:53 2009
From: Huddleston at CIRA.COLOSTATE.EDU (Huddleston, John)
Date: Thu, 12 Nov 2009 12:11:53 -0800
Subject: Another free shapefile for world maps
In-Reply-To: <77fcd6b20911121156x65f0a5c0wa1511100b282bb2@mail.gmail.com>
Message-ID: <THU.12.NOV.2009.121153.0800.>

Arlindo

Here is a projection for WGS84.

GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

Save this line in a file called world.prj in the same directory was the world.dbf, world.shp, and world.shx files.

It appears to match the outlines of the continents with other maps.

John

From: arlindo.dasilva at gmail.com [mailto:arlindo.dasilva at gmail.com] On Behalf Of Arlindo da Silva
Sent: Thursday, November 12, 2009 12:56 PM
To: Huddleston, John
Cc: gradsusr
Subject: Re: Another free shapefile for world maps

John,

    What is your recommendation? Should we reproject that free dataset for general grads use? Are you setup for producing such a re-projected shapefile with the corresponding .prj metadata?

    Thanks,

        Arlindo


On Thu, Nov 12, 2009 at 10:52 AM, Huddleston, John <Huddleston at cira.colostate.edu<mailto:Huddleston at cira.colostate.edu>> wrote:
Arlindo, here is a list of projections for Antartica:

$ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/Antarctica/
Australian Antarctic 1998.prj  Deception Island.prj  Pointe Geologie Perroud 1950.prj
Camp Area Astro.prj            Petrels 1972.prj

The NAD27 is North America Datum of 1927 and is, in general, not a good choice for projections of the world. The original maps that USGS created for the United States were based on NAD27 and the CLARK1866 sphere and they have been re-projected by USGS to NAD83 and the GRS80 sphere.

Projections for the world would fall into one of two categories: Geographic and Projected.

 $ ls Coordinate\ Systems/Geographic\ Coordinate\ Systems/World/
ITRF 1988.prj  ITRF 1991.prj  ITRF 1994.prj  ITRF 2000.prj  WGS 1966.prj
ITRF 1989.prj  ITRF 1992.prj  ITRF 1996.prj  ITRF 2005.prj  WGS 1972 TBE.prj
ITRF 1990.prj  ITRF 1993.prj  ITRF 1997.prj  NSWC 9Z-2.prj  WGS 1972.prj and WGS 1984.prj

and

$ ls Coordinate\ Systems/Projected\ Coordinate\ Systems/world
Aitoff (world).prj                   Flat Polar Quartic (world).prj  Sinusoidal (world).prj
Behrmann (world).prj                 Fuller (world).prj              Sphere-based
Bonne (world).prj                    Gall Stereographic (world).prj  The World from Space.prj
Craster Parabolic (world).prj        Goode Homolosine (Land).prj     Times (world).prj
Cube (world).prj                     Goode Homolosine (Ocean).prj    Van der Grinten I (world).prj
Cylindrical Equal Area (world).prj   Hammer-Aitoff (world).prj       Vertical Perspective (world).prj
Eckert I (world).prj                 Loximuthal (world).prj          WGS 1984 PDC Mercator.prj
Eckert II (world).prj                Mercator (world).prj            WGS 1984 Web Mercator (Auxiliary Sphere).prj
Eckert III (world).prj               Miller Cylindrical (world).prj  WGS 1984 Web Mercator.prj
Eckert IV (world).prj                Mollweide (world).prj           Winkel I (world).prj
Eckert V (world).prj                 Plate Carree (world).prj        Winkel II (world).prj
Eckert VI (world).prj                Polyconic (world).prj           Winkel Tripel (NGS - world).prj
Equidistant Conic (world).prj        Quartic Authalic (world).prj
Equidistant Cylindrical (world).prj  Robinson (world).prj

John

John Huddleston, PhD
Research Associate
Cooperative Institute for Research in the Atmosphere
Mail Stop 1375 @ CIRA
Colorado State University
Fort Collins, CO 80521
970-491-8602

From: arlindo.dasilva at gmail.com<mailto:arlindo.dasilva at gmail.com> [mailto:arlindo.dasilva at gmail.com<mailto:arlindo.dasilva at gmail.com>] On Behalf Of Arlindo da Silva
Sent: Thursday, November 12, 2009 8:36 AM
To: Huddleston, John
Cc: gradsusr
Subject: Re: Another free shapefile for world maps

On Thu, Nov 12, 2009 at 9:05 AM, Huddleston, John <Huddleston at cira.colostate.edu<mailto:Huddleston at cira.colostate.edu>> wrote:
Arlindo,

Please excuse this direct email to you, the GrADS email list does not allow me to reply or send anything to the list.

I downloaded the world.tar.bz2 file and it does not contain a PRJ file. While the three DBF, SHP, and SHX files conform exactly to the ESRI 1994 shapefile standard; the accuracy and precision of our software has increased significantly since the standard was propagated.

As such, it is important to know the projection of the world maps.

You may need to contact the data producers directly about this, it should be a simple matter to add a standard .prj file. However, on the website it says:

The data is based upon a free map published by TerraSpace, Russia<http://www.terraspace.ru/> as referenced by Geocommunity<http://data.geocomm.com/editorspicks/data_world11.html>. I added Antarctica after Curt Mills pointed out that there was a missing continent. Antartica's data came from the Digital Chart of the World and was reprojected into NAD27 to agree with the rest of the world.

I am not sure what NAD27 is, but I was assuming it was a standard projection. Let me know if you find anything.

         Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu<mailto:dasilva at alum.mit.edu>



--
Arlindo da Silva
dasilva at alum.mit.edu<mailto:dasilva at alum.mit.edu>
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From jmssnyder at UCDAVIS.EDU  Thu Nov 12 23:15:21 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Fri, 13 Nov 2009 05:15:21 +0100
Subject: Grads for Windows version 2 installation problems
Message-ID: <FRI.13.NOV.2009.051521.0100.>

I am having some problems with installing and running GrADS version 2 for
windows.  I downloading both the following zip files cygwin.zip
cygwin-dlls.zip
and unzipped them.  What goes next?  When I open Grads version 2 I get the
following message:

"This applicaiton has failed to start because cygX11-6.dll was not found"

I saw this in the folder cygwin-dlls, which is from the cygwin.zip.  How
can I get this problem to function properly?

Thanks,

Jason


From gpmenon009 at GMAIL.COM  Fri Nov 13 01:35:42 2009
From: gpmenon009 at GMAIL.COM (Gopal Menon)
Date: Fri, 13 Nov 2009 12:05:42 +0530
Subject: Regridding in grads
Message-ID: <FRI.13.NOV.2009.120542.0530.>

I am using the latest version of grads (grads 2.0) . I just wanted to know
whether the regridding function is included in grads 2.0 version. If it is
included can you just kindly enlighten me how to use it?
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From zmumba at YAHOO.COM  Fri Nov 13 04:11:50 2009
From: zmumba at YAHOO.COM (zilore mumba)
Date: Fri, 13 Nov 2009 01:11:50 -0800
Subject: writing grib2 to NetCDF
Message-ID: <FRI.13.NOV.2009.011150.0800.>

Dear Grads users,
Help sought if possible.
I have data in GRIB2 format from ECMWF. Because of the double headers in the data (complex packing), wgrib is not able to decode it propoerly hence not possible to make a ctl with grib2ctl.pl.
What I do is to decode the data with the ECMWF GRIB_API decoder and rewrite it in binary for grads with fortran. This works fine. I thought another alternative would be to convert the GRIB2 to NetCDF.
I have checked the listserver but did not find anything.
Is such a conversion possible?
Thanks for assistance
Zilore




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From diego.morelli at TRS.IT  Fri Nov 13 05:44:34 2009
From: diego.morelli at TRS.IT (Diego Morelli)
Date: Fri, 13 Nov 2009 11:44:34 +0100
Subject: R: Meaning of descriptor file (*.ctl) variable names
In-Reply-To: <4AFC2350.9030109@noaa.gov>
Message-ID: <FRI.13.NOV.2009.114434.0100.>

Hello Wesley,

Can I say that the rule is:

If, about a certain variable relative to an isobaric level, it's available
only one level, then the variable get the suffix <level>+<mb>, otherwise it
get the suffix "prs" ??

In the attachment there is a file in which there is 2 variables available on
2 levels, and they are declared of the kind "prs". Here bottom is its ctl
file.

dset /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b
index /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b.idx
undef 9.999E+20
title /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b
*  produced by grib2ctl v0.9.12.5p45
dtype grib 11
options yrev
ydef 37 linear -90.000000 2.5
xdef 37 linear 90.000000 2.500000
tdef 1 linear 00Z28apr2005 1mo
*  z has 2 levels, for prs
zdef 2 levels
850 500
vars 4
HGT500mb  0 7,100,500 ** 500 mb Geopotential height [gpm]
PRMSLsfc  0 2,1,0  ** surface Pressure reduced to MSL [Pa]
UGRDprs 2 33,100,0 ** (profile) u wind [m/s]
VGRDprs 2 34,100,0 ** (profile) v wind [m/s]
ENDVARS

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: gioved? 12 novembre 2009 16.02
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: Meaning of descriptor file (*.ctl) variable names

Diego,

Sometimes a variable may be available as a vertical profile. Sometimes a
variable may only be available on
one or two levels. When a variable is available as a vertical profile on
pressure surfaces, the suffix "prs" is
used. If the variable is not available on a vertical profile, the suffix
is the level descriptor.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
> variables having the suffix ?mb?. These variables are relative to an
> isobaric level type (value 100 in the PDS grib section, octet number
> 10), with a value expressed in hPa.
>
> I see that the variables with suffix prs are relative also to an
> isobaric level type.
>
> My questions is to know what is the difference between the variable
> with suffix mb and those with suffix prs.
>
> Here there is an example of a descriptor file:
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
>
> undef 9.999E+20
>
> title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> * produced by grib2ctl v0.9.12.5p45
>
> dtype grib 255
>
> options yrev
>
> ydef 66 linear 10.000000 1
>
> xdef 126 linear -60.000000 1.000000
>
> tdef 1 linear 12Z18jul2009 1mo
>
> * z has 6 levels, for prs
>
> zdef 6 levels
>
> 925 850 700 500 400 300
>
> vars 2
>
> * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
>
> * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
>
> ENDVARS
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> Regards,
>
> Diego
>
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From leonardo.silva at CPTEC.INPE.BR  Fri Nov 13 06:20:51 2009
From: leonardo.silva at CPTEC.INPE.BR (Leonardo Diogo)
Date: Fri, 13 Nov 2009 09:20:51 -0200
Subject: writing grib2 to NetCDF
In-Reply-To: <380950.87978.qm@web57002.mail.re3.yahoo.com>
Message-ID: <FRI.13.NOV.2009.092051.0200.>

Dear friend,

You can try cdo (climate data operators) which convert .grib2 files to
.nc and .ctl too. You can get it in
http://www.mpimet.mpg.de/fileadmin/software/cdo/#Download. That
program is useful to make some statistics calculus too. You can get a
cdo reference card in
http://www.mpimet.mpg.de/fileadmin/software/cdo/cdo_refcard.pdf.

I hope so you have your asks solved.

Regards

Leonardo
= = = = = = = =
Quoting zilore mumba <zmumba at YAHOO.COM>:

> Dear Grads users,
> Help sought if possible.
> I have data in GRIB2 format from ECMWF. Because of the double
> headers in the data (complex packing), wgrib is not able to decode
> it propoerly hence not possible to make a ctl with grib2ctl.pl.
> What I do is to decode the data with the ECMWF GRIB_API decoder and
> rewrite it in binary for grads with fortran. This works fine. I
> thought another alternative would be to convert the GRIB2 to NetCDF.
> I have checked the listserver but did not find anything.
> Is such a conversion possible?
> Thanks for assistance
> Zilore
>
>
>
>
>


From leonardo.silva at CPTEC.INPE.BR  Fri Nov 13 06:56:50 2009
From: leonardo.silva at CPTEC.INPE.BR (Leonardo Diogo)
Date: Fri, 13 Nov 2009 09:56:50 -0200
Subject: Singular Value Decomposition (SVD)
Message-ID: <FRI.13.NOV.2009.095650.0200.>

Hi friends,


I would like to know if someone have a Grads Script to calculate a SVD
of two different fields. I'm trying to construct a Atlantic Meridional
Mode index based on method used by Chiang and Vimont (2004)
(http://www.esrl.noaa.gov/psd/data/timeseries/monthly/AMM/) but I
don't have any script to do it here.

Best regards

Leonardo


From zhuangsy at CMA.GOV.CN  Fri Nov 13 07:39:13 2009
From: zhuangsy at CMA.GOV.CN (Zhuang Shiyu)
Date: Fri, 13 Nov 2009 20:39:13 +0800
Subject: No subject
Message-ID: <FRI.13.NOV.2009.203913.0800.>

Hi,
Can Anybody provide high resolution land mask data lpoly over North sea/Baltic sea? The range could be from 5W-40E, 30S-75N. Thanks.

Shiyu


From arlindo.dasilva at GMAIL.COM  Fri Nov 13 08:32:50 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 08:32:50 -0500
Subject: No subject
In-Reply-To: <20091113203913.APX61720@rays.cma.gov.cn>
Message-ID: <FRI.13.NOV.2009.083250.0500.>

On Fri, Nov 13, 2009 at 7:39 AM, Zhuang Shiyu <zhuangsy at cma.gov.cn> wrote:

> Hi,
> Can Anybody provide high resolution land mask data lpoly over North
> sea/Baltic sea? The range could be from 5W-40E, 30S-75N. Thanks.
>
>
Is the attached plot high enough resolution for your purpose? It was
produced with
the shapefile extension:

open something
set lon -5 40
set lat 30 75
set mpdraw off
shp_polyf admin98

This requires the opengrads bundle. More info on the shape extension here:

   http://opengrads.org/doc/udxt/shape/

This page has a list of other shapefiles that may give you higher
resolution.

      Arlindo


--
Arlindo da Silva
dasilva at alum.mit.edu
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From jma at COLA.IGES.ORG  Fri Nov 13 08:40:46 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Fri, 13 Nov 2009 08:40:46 -0500
Subject: Grads:PDEF for tranverse Mercator (native grids)
In-Reply-To: <20091112152732.POF58217@punts4.cc.uga.edu>
Message-ID: <FRI.13.NOV.2009.084046.0500.>

Hi, Willis --
You should subscribe to the gradsusr list and post this request there
-- that way you have 1800 other users who might be able to help you. I
have no experience dealing with files on a transverse mercator
projection, but I can tell you that you have two options with pdef:
1. Create a pdef file for use with the PDEF BILIN option. You need to
be able to calculate the i,j values (in the native transverse mercator
grid) of a given lat/lon pair (which are the coordinates of the
destination grid). Then GrADS does bilinear interpolation from the
four grid points surrounding the i,j values.
2. Create a pdef file for use with the PDEF GENERAL option to create
your own mapping of interpolation values and weights to use.

--Jennifer


On Nov 12, 2009, at 3:27 PM, <willshem at uga.edu> <willshem at uga.edu>
wrote:

>
> From: <willshem at uga.edu>
> Date: November 9, 2009 4:36:08 PM EST
> To: jma at COLA.IGES.ORG
> Subject: Grads:PDEF for tranverse Mercator (native grids)
>
>
> Hi! Jennifer Adams
>
> My name is Willis Shem. I am a post-doctoral research associate at
> the University of Georgia in Athens (USA)
>
> I have been trying to display (in a grads map) some model output
> data which is pre-projected (mapped on a transverse mercator
> projection). I am having trouble making up the right PDEF format to
> interpolate the data to either rectilinear grids or any other
> projection. I would greatly appreciate your help with this. Thanks
> in advance.
>
> Dr. Willis Shem
>
>



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From arlindo.dasilva at GMAIL.COM  Fri Nov 13 08:40:34 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 08:40:34 -0500
Subject: Singular Value Decomposition (SVD)
In-Reply-To: <20091113095650.fx0erfy08okck048@webmail2.cptec.inpe.br>
Message-ID: <FRI.13.NOV.2009.084034.0500.>

On Fri, Nov 13, 2009 at 6:56 AM, Leonardo Diogo <
leonardo.silva at cptec.inpe.br> wrote:

> Hi friends,
>
>
> I would like to know if someone have a Grads Script to calculate a SVD
> of two different fields. I'm trying to construct a Atlantic Meridional
> Mode index based on method used by Chiang and Vimont (2004)
> (http://www.esrl.noaa.gov/psd/data/timeseries/monthly/AMM/) but I
> don't have any script to do it here.
>
>
If python is an option, you should be able to do this easily with pygrads:

     http://opengrads.org/wiki/index.php?title=Python_Interface_to_GrADS

The current EOF functionality in pygrads uses a SVD decomposition. Computing
the SVD of 2 fields would be a trivial generalization.

  Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Fri Nov 13 08:45:02 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 08:45:02 -0500
Subject: Grads for Windows version 2 installation problems
In-Reply-To: <20091113041643.344D4206CC@mx2.cineca.it>
Message-ID: <FRI.13.NOV.2009.084502.0500.>

On Thu, Nov 12, 2009 at 11:15 PM, Jason Snyder <jmssnyder at ucdavis.edu>wrote:

> I am having some problems with installing and running GrADS version 2 for
> windows.  I downloading both the following zip files cygwin.zip
> cygwin-dlls.zip
> and unzipped them.  What goes next?  When I open Grads version 2 I get the
> following message:
>
> "This applicaiton has failed to start because cygX11-6.dll was not found"
>
> I saw this in the folder cygwin-dlls, which is from the cygwin.zip.  How
> can I get this problem to function properly?
>
>
You may find simpler installing the OpenGrADS automatic installer:

http://opengrads.org/wiki/index.php?title=Installing_GrADS_v2.0_on_Microsoft_Windows

You should be able to get going in less than 5 minutes. As a bonus, you get
the opengrads extensions which you could ignore if you do not need them.

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Fri Nov 13 08:47:43 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 08:47:43 -0500
Subject: Regridding in grads
In-Reply-To: <abe9a17e0911122235p18006e8eu391cf2f2dbadcb05@mail.gmail.com>
Message-ID: <FRI.13.NOV.2009.084743.0500.>

On Fri, Nov 13, 2009 at 1:35 AM, Gopal Menon <gpmenon009 at gmail.com> wrote:

> I am using the latest version of grads (grads 2.0) . I just wanted to know
> whether the regridding function is included in grads 2.0 version. If it is
> included can you just kindly enlighten me how to use it?


The OpenGrADS Bundle distribution includes the re() function as an
extension:

       http://opengrads.org/doc/udxt/re/

You can find more info on installing the opengrads bundle here:


http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Fri Nov 13 08:50:27 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 08:50:27 -0500
Subject: Regridding in grads
In-Reply-To: <77fcd6b20911130547p1e491aecqbcbdfb2e0a2ab88b@mail.gmail.com>
Message-ID: <FRI.13.NOV.2009.085027.0500.>

On Fri, Nov 13, 2009 at 8:47 AM, Arlindo da Silva <arlindo.dasilva at gmail.com
> wrote:

> On Fri, Nov 13, 2009 at 1:35 AM, Gopal Menon <gpmenon009 at gmail.com> wrote:
>
>> I am using the latest version of grads (grads 2.0) . I just wanted to know
>> whether the regridding function is included in grads 2.0 version. If it is
>> included can you just kindly enlighten me how to use it?
>
>
> The OpenGrADS Bundle distribution includes the re() function as an
> extension:
>
>        http://opengrads.org/doc/udxt/re/
>
> You can find more info on installing the opengrads bundle here:
>
>
> http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle
>
>
BTW, this recipe has a complete example of how to use re()

http://cookbooks.opengrads.org/index.php?title=Recipe-019:_Comparing_Reanalyses_with_interpolation_from_MERRA_to_NCEP_Grid

--
Arlindo da Silva
dasilva at alum.mit.edu
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From Wesley.Ebisuzaki at NOAA.GOV  Fri Nov 13 10:12:18 2009
From: Wesley.Ebisuzaki at NOAA.GOV (Wesley Ebisuzaki)
Date: Fri, 13 Nov 2009 10:12:18 -0500
Subject: R: Meaning of descriptor file (*.ctl) variable names
In-Reply-To: <18BAEC28A3E9421582F8E78FA28461E9@trsspa.it>
Message-ID: <FRI.13.NOV.2009.101218.0500.>

Diego,

The rule that generates the variable suffix has changed over
time and will change if I think it needs updating. Here is what happens

(1) look for vertical coordinate (not layer) that has the most levels
(grib2ctl >= 2,
g2ctl >= 3) and make that the vertical coordinate. The vertical coordinate
could be pressure levels, vertical height, sigma, potential temperature,
etc.
(There are options that affect the selection of the vertical coordinate)

(2) variables that use a different vertical coordinate or only 1 level
will have suffixes with their
level information.

(3) variables with > 1 level and using the selected vertical coordinate
use prs for pressure level,
something else for sigma, etc.

Wesley

Diego Morelli wrote:
> Hello Wesley,
>
> Can I say that the rule is:
>
> If, about a certain variable relative to an isobaric level, it's available
> only one level, then the variable get the suffix <level>+<mb>, otherwise it
> get the suffix "prs" ??
>
> In the attachment there is a file in which there is 2 variables available on
> 2 levels, and they are declared of the kind "prs". Here bottom is its ctl
> file.
>
> dset /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b
> index /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b.idx
> undef 9.999E+20
> title /home/cyprus/grads/compiled_env/grads-2.0.a7.1/bin/cyprus.b
> *  produced by grib2ctl v0.9.12.5p45
> dtype grib 11
> options yrev
> ydef 37 linear -90.000000 2.5
> xdef 37 linear 90.000000 2.500000
> tdef 1 linear 00Z28apr2005 1mo
> *  z has 2 levels, for prs
> zdef 2 levels
> 850 500
> vars 4
> HGT500mb  0 7,100,500 ** 500 mb Geopotential height [gpm]
> PRMSLsfc  0 2,1,0  ** surface Pressure reduced to MSL [Pa]
> UGRDprs 2 33,100,0 ** (profile) u wind [m/s]
> VGRDprs 2 34,100,0 ** (profile) v wind [m/s]
> ENDVARS
>
> -----Messaggio originale-----
> Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
> Wesley Ebisuzaki
> Inviato: gioved? 12 novembre 2009 16.02
> A: GRADSUSR at LIST.CINECA.IT
> Oggetto: Re: Meaning of descriptor file (*.ctl) variable names
>
> Diego,
>
> Sometimes a variable may be available as a vertical profile. Sometimes a
> variable may only be available on
> one or two levels. When a variable is available as a vertical profile on
> pressure surfaces, the suffix "prs" is
> used. If the variable is not available on a vertical profile, the suffix
> is the level descriptor.
>
> Wesley Ebisuzaki
>
>
> Diego Morelli wrote:
>
>> When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
>> variables having the suffix ?mb?. These variables are relative to an
>> isobaric level type (value 100 in the PDS grib section, octet number
>> 10), with a value expressed in hPa.
>>
>> I see that the variables with suffix prs are relative also to an
>> isobaric level type.
>>
>> My questions is to know what is the difference between the variable
>> with suffix mb and those with suffix prs.
>>
>> Here there is an example of a descriptor file:
>>
>>
>>
> ----------------------------------------------------------------------------
> ----------------------------------------------
>
>> dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>>
>> index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
>>
>> undef 9.999E+20
>>
>> title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>>
>> * produced by grib2ctl v0.9.12.5p45
>>
>> dtype grib 255
>>
>> options yrev
>>
>> ydef 66 linear 10.000000 1
>>
>> xdef 126 linear -60.000000 1.000000
>>
>> tdef 1 linear 12Z18jul2009 1mo
>>
>> * z has 6 levels, for prs
>>
>> zdef 6 levels
>>
>> 925 850 700 500 400 300
>>
>> vars 2
>>
>> * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
>>
>> * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
>>
>> ENDVARS
>>
>>
>>
> ----------------------------------------------------------------------------
> ----------------------------------------------
>
>> Regards,
>>
>> Diego
>>
> >


From heiner at MISU.SU.SE  Fri Nov 13 10:26:20 2009
From: heiner at MISU.SU.SE (=?ISO-8859-1?Q?Heiner_K=F6rnich?=)
Date: Fri, 13 Nov 2009 16:26:20 +0100
Subject: writing grib2 to NetCDF
In-Reply-To: <380950.87978.qm@web57002.mail.re3.yahoo.com>
Message-ID: <FRI.13.NOV.2009.162620.0100.>

Hi Zilore,

on the MARS server at ECMWF you can convert the data directly to NetCDF. But
you need access to the ECMWF computer for this.
Then:

mars << EOF
   retrieve,
      time=00:00:00/06:00:00/12:00:00/18:00:00,
      date=$iyear-$longmonth-01/to/$iyear-$longmonth-$lastday[$imonth],
      stream=oper,
      levtype=pl,
      expver=1,
      type=an,
      class=ei,
      param=130.128,

levelist=1/2/3/5/7/10/20/30/50/70/100/125/150/175/200/225/250/300/350/400/450/500/550/600/650/700/750/775/800/825/850/875/900/925/950/975/1000,
      grid = 1.0/1.0,
      target="output.grib"
EOF
mars -N <<@@
  mars2netcdf,
      source = output.grib,
      target = $outname
      ignore = TYPE/STEP
@@


Regards,
Heiner
On Fri, Nov 13, 2009 at 10:11 AM, zilore mumba <zmumba at yahoo.com> wrote:

> Dear Grads users,
> Help sought if possible.
> I have data in GRIB2 format from ECMWF. Because of the double headers in
> the data (complex packing), wgrib is not able to decode it propoerly hence
> not possible to make a ctl with grib2ctl.pl.
> What I do is to decode the data with the ECMWF GRIB_API decoder and rewrite
> it in binary for grads with fortran. This works fine. I thought another
> alternative would be to convert the GRIB2 to NetCDF.
> I have checked the listserver but did not find anything.
> Is such a conversion possible?
> Thanks for assistance
> Zilore
>
>
>


-- 
Heiner K?rnich
Dept. of Meteorology            Tel:  +46 8 164333
Stockholms University, SE-106 91 Stockholm, Sweden
Email: heiner at misu.su.se   www.misu.su.se/~heiner/
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From jma at COLA.IGES.ORG  Fri Nov 13 10:42:00 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Fri, 13 Nov 2009 10:42:00 -0500
Subject: Fwd: Grads for Windows version 2 installation problems
Message-ID: <FRI.13.NOV.2009.104200.0500.>



Begin forwarded message:

> From: "Huddleston, John" <Huddleston at cira.colostate.edu>
> Date: November 13, 2009 10:35:59 AM EST
> To: "jma at cola.iges.org" <jma at cola.iges.org>
> Subject: FW: Grads for Windows version 2 installation problems
>
> Jennifer, this is one of two emails that the GrADS list did not send
> out this morning. John
>
> ________________________________________
> From: Huddleston, John
> Sent: Friday, November 13, 2009 7:27 AM
> To: GRADSUSR at LIST.CINECA.IT
> Subject: RE: Grads for Windows version 2 installation problems
>
> Jason
>
> Arlindo's suggestion to use the installer is best if you are not
> "systems" oriented with Windows.
>
> The binaries you are trying to use are based on the pure UNIX code;
> so, there is no mounting and unmounting of a "C:\Cygwin" directory.
> For production work on a windows system, these binaries are better
> qualified.
>
> In order to use these, create a directory, much like GrADS
> installation does automatically, and put that directory in your
> PATH. See Start-Settings-Control Panel-System. Go to the Advanced
> TAB, select Environmental Variable and edit the PATH to include the
> new directory where you have deposited the .EXE and .DLL files. Open
> a CMD window.  You must have a XWIN server running locally. This
> comes with the GrADS installation; however, if you use grads with
> the -lbc options (production) no XWIN server is required and grads
> will produce your images with the printim command.
>
> See http://views.cira.colostate.edu/nasa for thousands of satellite
> images created with GrADS. An example control script is shown below
> which creates the Aura OMNO2G.003 NO2 images.
>
> John Huddleston
>
> 'open no2g.ctl'
> 'c'
> 'set font 0'
> 'set strsiz 0.12 0.12'
> 'set display color white'
> 'set gxout grfill'
> 'set parea 0.5 9.5 0.1 8.5'
> 'set csmooth on'
> 'set cint 15'
> 'set clevs 0.0e+15 1.0e+15 2.0e+15 3.0e+15 4.0e+15 5.0e+15 6.0e+15
> 7.0e+15 8.0e+15 9.0e+15.0e+15 11.0e+15 12.0e+15 13
> .0e+15 14.0e+15'
> 'set ccols 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30'
> 'set rgb 16 0 0 165'
> 'set rgb 17 0 0 255'
> 'set rgb 18 0 65 255'
> 'set rgb 19 0 125 255'
> 'set rgb 20 0 190 255'
> 'set rgb 21 0 255 255'
> 'set rgb 22 66 255 189'
> 'set rgb 23 132 255 123'
> 'set rgb 24 205 255 50'
> 'set rgb 25 255 239 0'
> 'set rgb 26 255 175 0'
> 'set rgb 27 255 110 0'
> 'set rgb 28 255 46 0'
> 'set rgb 29 239 0 0'
> 'set rgb 30 165 0 0'
> 'set cmin 0.0e+15'
> 'set cmax 14.0e+15'
> 'set lon -180 180'
> 'set grads off'
> 'draw string 1.0 0.60 OMI-Aura_L2G-
> OMNO2G_2006m1231_v003-2008m0105t001916'
> 'draw string 8.0 0.60 CIRA/NASA'
> 'd maskout(no2,no2-0.0001)'
> 'draw title \ColumnAmountNO2_ColumnAmountNO2_20061231\'
> 'cbarn2 .90 1 9.8 4.3'
> 'printim ColumnAmountNO2_ColumnAmountNO2_20061231_World.gif gif x832
> y624'
> 'quit'
> ________________________________________
> From: GRADSUSR at LIST.CINECA.IT [GRADSUSR at LIST.CINECA.IT] On Behalf Of
> Jason Snyder [jmssnyder at UCDAVIS.EDU]
> Sent: Thursday, November 12, 2009 9:15 PM
> To: GRADSUSR at LIST.CINECA.IT
> Subject: Grads for Windows version 2 installation problems
>
> I am having some problems with installing and running GrADS version
> 2 for
> windows.  I downloading both the following zip files cygwin.zip
> cygwin-dlls.zip
> and unzipped them.  What goes next?  When I open Grads version 2 I
> get the
> following message:
>
> "This applicaiton has failed to start because cygX11-6.dll was not
> found"
>
> I saw this in the folder cygwin-dlls, which is from the cygwin.zip.
> How
> can I get this problem to function properly?
>
> Thanks,
>
> Jason

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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From willshem at UGA.EDU  Fri Nov 13 12:05:50 2009
From: willshem at UGA.EDU (Willis Shem)
Date: Fri, 13 Nov 2009 12:05:50 -0500
Subject: Transverse Mercator Projection
Message-ID: <FRI.13.NOV.2009.120550.0500.>

Dear all

I have been trying to display (in a grads map) some model output data which is pre-projected (mapped on a transverse mercator projection). I am having trouble making up the right PDEF format to interpolate the data to either rectilinear grids or any other projection. I would greatly
appreciate your help with this. Thanks in advance.

Willis


From arlindo.dasilva at GMAIL.COM  Fri Nov 13 13:27:55 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 13 Nov 2009 13:27:55 -0500
Subject: Grads for Windows version 2 installation problems
In-Reply-To: <64B63BF9-4D0D-46F1-8477-488288ADD043@cola.iges.org>
Message-ID: <FRI.13.NOV.2009.132755.0500.>

On Fri, Nov 13, 2009 at 10:42 AM, Jennifer Adams <jma at cola.iges.org> wrote:

>
> ________________________________________
> From: Huddleston, John
> Sent: Friday, November 13, 2009 7:27 AM
> To: GRADSUSR at LIST.CINECA.IT
> Subject: RE: Grads for Windows version 2 installation problems
>
> Jason
>
> Arlindo's suggestion to use the installer is best if you are not "systems"
> oriented with Windows.
>
> The binaries you are trying to use are based on the pure UNIX code; so,
> there is no mounting and unmounting of a "C:\Cygwin" directory. For
> production work on a windows system, these binaries are better qualified.
>
>
Well, this mounting/unmounting only takes place if there is no cygwin
installed and it was introduced for a good reason. Without it you will have
problems with the "!" shell-escape command when cygwin is not installed, and
"/tmp" may not be found which may cause opendap to misbehave.  Have you
tested your binaries on a machine without a cygwin installation?

Your point is well taken, for a production environment the superpack is a
bit of an overkill, although I am not sure it has any major performance
drawback. This is the reason why I also include a bin and gex tarballs for
those users having a cygwin installation already. The superpack is intended
for those who do not want to bother with it.

      Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From liuzf406 at 126.COM  Fri Nov 13 15:21:50 2009
From: liuzf406 at 126.COM (liuzf406)
Date: Sat, 14 Nov 2009 04:21:50 +0800
Subject: how to define projection
Message-ID: <SAT.14.NOV.2009.042150.0800.>

Hello everyone,
 
I plot climate feilds using Grads, but i want to convert the projection to NAD_1983_Albers. How can i do this?
 
Any help you can provide would be greatly appreciated, and thank you for your time.
 
Best,
Liu



 
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From axl419 at YAHOO.COM  Sat Nov 14 01:59:52 2009
From: axl419 at YAHOO.COM (See Hai Ooi)
Date: Fri, 13 Nov 2009 22:59:52 -0800
Subject: Hourly gridded satellite data set of TBB for the tropical region
In-Reply-To: <77fcd6b20911131027w6321a379lb167483d9015b6d5@mail.gmail.com>
Message-ID: <FRI.13.NOV.2009.225952.0800.>

Dear all,

     Does anyone know where to download the above-mentioned dataset at 0.25 x 0.25 deg resolution in netcdf format ?

     Regards.

Ooi



      Get your new Email address!
Grab the Email name you&#39;ve always wanted before someone else does!
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From h.meteo.shirazu at GMAIL.COM  Sat Nov 14 14:46:00 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Sat, 14 Nov 2009 13:46:00 -0600
Subject: gridding data
Message-ID: <SAT.14.NOV.2009.134600.0600.>

Hi all user
I have a text data, (1500*1500 matrix)
I want to gridd it and convert them to *.dat file
I want do this with matlab or other program
can nay one help me for this fortran program in this link?
http://cookbooks.opengrads.org/index.php?title=Recipe-004:_Creating_GrADS_binary_gridded_files_using_FORTRAN
have you a simple program to do this?
thanks
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From andy at F5DATA.COM  Sat Nov 14 17:01:50 2009
From: andy at F5DATA.COM (Andrew Revering)
Date: Sat, 14 Nov 2009 16:01:50 -0600
Subject: Nexrad
Message-ID: <SAT.14.NOV.2009.160150.0600.>

GrADS users,



I tried to do a search in the archives, but I keep getting an error message
saying the server isn't on or something like that.



I'm trying to use the Java Nexrad Exporter to export nexrad radar files into
GrADS binary format

http://lwf.ncdc.noaa.gov/oa/wct/batch.php



Every time I do it, it fails saying something about not being able to
determine the output format.



Has anyone used this and if so, what am I doing wrong?




From alessandro.raolil at CMCC.IT  Mon Nov 16 06:38:50 2009
From: alessandro.raolil at CMCC.IT (Sandro Raolil)
Date: Mon, 16 Nov 2009 12:38:50 +0100
Subject: McGraG version 1.1.0 based on OpenGrADS now available!
Message-ID: <MON.16.NOV.2009.123850.0100.>

Dear GrADS Users,

I am happy to inform you that is now available McGraG version 1.1.0 based
on OpenGrADS 2.0.a7.oga.3!

McGraG is the new GUI, based on OpenGrADS, developed by CMCC to provide a
more powerful and user-friendly access to GrADS functionalities.

You can download software here:

http://www.cmcc.it/data-models/software/mcgrag

and read news section for further details


Thanks in advance for your attention
Regards
Alessandro Raolil



--
Ing. Alessandro Raolil

Euromediterranean Center for Climate Changes - https://www.cmcc.it SPACI
Consortium - www.spaci.it
National Nanotechnology Laboratory (NNL/CNR-INFM) - www.nnl.it

Via per Monteroni - 73100 Lecce (Italy)
email: alessandro.raolil at unile.it


From eliavs at GMAIL.COM  Sun Nov 15 04:54:49 2009
From: eliavs at GMAIL.COM (eliav schmulewitz)
Date: Sun, 15 Nov 2009 11:54:49 +0200
Subject: eror notice
Message-ID: <SUN.15.NOV.2009.115449.0200.>

Hallo grads users!
i am using grads v2.0a7.oga.1 on an xp OS
and i am running a script that works on other computers
after the loop runs for three times i get an error notice
can anyone help?
thank you
eliav
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From dgejaci at FURG.BR  Sat Nov 14 17:42:42 2009
From: dgejaci at FURG.BR (Jaci Saraiva)
Date: Sat, 14 Nov 2009 19:42:42 -0300
Subject: Sinalizar esta mensagem EXTREME STORM SURGES IN THE SOUTH OF
 BRAZIL: ATMOSPHERIC CONDITIONS AND SHORE EROSION
In-Reply-To: <310538.87590.qm@web36203.mail.mud.yahoo.com>
Message-ID: <SAT.14.NOV.2009.194242.0300.>

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From bak41 at STUDENT.CANTERBURY.AC.NZ  Sat Nov 14 17:51:27 2009
From: bak41 at STUDENT.CANTERBURY.AC.NZ (Basit Khan)
Date: Sun, 15 Nov 2009 11:51:27 +1300
Subject: Isotachs in GrADS
Message-ID: <SUN.15.NOV.2009.115127.1300.>

Hi friends,
I am new to GrADS. Just wondering does anybody know how to plot isotachs
inGrADS.
Cheers,

--
---
Basit A. Khan
PhD Candidate
Centre for Atmospheric Research
Department of Geography
University of Canterbury  Te Whare Wananga o Waitaha Private Bag 4800
Christchurch 8020, New Zealand
Tel: (643) 364 2987 Ext. 3088
Fax: (643) 364 2907
bak41 at student.canterbury.ac.nz


From dipakmath at GMAIL.COM  Sun Nov 15 11:40:48 2009
From: dipakmath at GMAIL.COM (dipak sahu)
Date: Sun, 15 Nov 2009 22:10:48 +0530
Subject: Windvectormap
In-Reply-To: <6142b78e0911120416o6af88114k789e01a117067c02@mail.gmail.com>
Message-ID: <SUN.15.NOV.2009.221048.0530.>

Dear Amjad
     Is it atan2(u,v).........or atan2(v,u)..............
     I hope it's atan2(v,u)........

regards
dipak

On Thu, Nov 12, 2009 at 5:46 PM, Muhammad Amjad <amjadozi at gmail.com> wrote:

> Dear Chris,
>
> Could you please check with the following formula:
> wdir=atan2(u,v)/0.01745329 +180
> The size of wind represents the wind speed. So, I don't think the dispariy
> among the vectors can be removed.
>
> Cheers,
> Amjad.
>
>
>
> On 11/9/09, Chris Hayes <c.hayes at weeronline.nl> wrote:
>>
>> dear group,
>>
>> I need to plot the wind directions for stations with equally sized arrows.
>>
>> My dataset contains the direction in degrees (0-360).
>>
>> I use the gxout=vector map which requires a u and a v vector component
>> (i.e. the vertical and horizontal vector component).
>>
>> u
>> |      /winddir
>> |    /
>> |  /
>> |/___ v
>>
>>
>> I calculate u as -sin(winddir * pi/180)
>> I calculate v as -cos(winddir * pi/180)
>>
>> resulting in the display-command    ' -8*(sin(winddir * 0.0175)) ;
>> -8*(cos(winddir * 0.0175)) '
>> (where 8 makes the size of the arrow, which usually represents windspeed
>> but here is desired to be constant)
>>
>>
>> The direction of the arrows looks fine.
>> But some maps have only tiny arrows and some maps have only longtailed
>> arrows.
>> I cannot see a pattern. I have no mixed maps with tiny and large arrows.
>>
>> Should I change my formula, or the way I give the display command?
>>
>> thanks,
>> Chris
>>
>>
>>
>
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From dasilva at ALUM.MIT.EDU  Sun Nov 15 12:02:09 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Sun, 15 Nov 2009 12:02:09 -0500
Subject: Installing grads-2.0.a7.1
In-Reply-To: <b1f81da10911150106o582b1e70v3c9ab1ce2f3560da@mail.gmail.com>
Message-ID: <SUN.15.NOV.2009.120209.0500.>

On Sun, Nov 15, 2009 at 4:06 AM, I Ketut Swardika Swardika <
swardika at gmail.com> wrote:

> Dear openGrADS user
>
> I trying to setup grads-2.0.a7.oga.3-bundle-x86_64-unknown-linux-gnu.tar.gz
> on RHEL 4 x86_64bit.
> After copy some share library from libs folder to gex folder, opengrads
> would not start, just close without error.
> Am I miss something?. I plan to setup tiny data center and publish is it
> correct to use php interface is easy way, is there any example for it's
> implementation?. Thank you.
>
>

Please send questions like this to gradsusr. Do not write directly to me.
For one, other people may have already experienced this problem and found a
solution.

Make sure you only copied to gex/ those .so that were missing. Do not copy
the ones that you do not need. I'll need more detailed information about
your system in order to debug this. Can you tell me which .so you copied?
Can you send me the output of

% uname -a
% gcc --version
% g++ --version
% ldd Contents/Linux/Versions/2.0.a7.oga.3/x86_64/grads

Anybody out there running grads-2.0.a7.oga.3 under RHEL 4 x86_64bit?

Also, you can try the i686 linux binaries, they generally work under x86_64.
You probably get slightly better performance with the x86_64 binaries, but
the i686 binaries work quite well.

How comfortable are you building software?

  Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Mon Nov 16 08:19:14 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Mon, 16 Nov 2009 08:19:14 -0500
Subject: eror notice
In-Reply-To: <128fb9ed0911150154v7ffbf800v61e9498d68fe2164@mail.gmail.com>
Message-ID: <MON.16.NOV.2009.081914.0500.>

On Sun, Nov 15, 2009 at 4:54 AM, eliav schmulewitz <eliavs at gmail.com> wrote:

> Hallo grads users!
> i am using grads v2.0a7.oga.1 on an xp OS
> and i am running a script that works on other computers
> after the loop runs for three times i get an error notice
> can anyone help?
>

Please upgraded to the latest 2.0.a7.oga.3; we have fixed bugs in
2.0.a7.oga.1. Also look a the trobleshootinh section in the Getting Started
documet.

   Arlindo


--
Arlindo da Silva
dasilva at alum.mit.edu
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From dasilva at ALUM.MIT.EDU  Mon Nov 16 10:11:25 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Mon, 16 Nov 2009 10:11:25 -0500
Subject: memory limit opengrads windows XP
In-Reply-To: <47E99BCEDBF9334C96B6466807BD2981F931FF@scomp0039.wurnet.nl>
Message-ID: <MON.16.NOV.2009.101125.0500.>

On Mon, Nov 16, 2009 at 8:32 AM, Elbers, Jan <Jan.Elbers at wur.nl> wrote:

>  Dear Mr. Da Silva,
>
>

Please send messages to the gradsusr list...


> When defining large arrays i seem to run into a memory limitation of
> Opengrads 2.0.a7.oga.3.
> Could you please let me know if there is a limit on one individial array or
> on all defined arrays together?
>
> I am using ECWMF re-analisis data for the northern hemispere resulting in
> arrays of 181 x 720 x 488 grid cells (X x Y x T). At the point where it goes
> wrong opengrads.exe has allocated about 1 Gb of memory on my PC which has 2
> Gb of RAM.
>
>

One 3D array of this size consumes around 500Mb of memory as GrADS v2 uses
double precision (8 bytes) to store each gridcell. Depending on your format,
it could be caching some of the I/O, which results in even more memory
usage. Your may stretching the limits of your hardware.

Now, GrADS v1.x uses 4 bytes to store each grid cell resulting in about half
the memory usage of GrADS v2.  Unless you need GrADS v2 specific features,
the Win32 Superpack v1.9-rc1 is probably the best option for dealing with
such large arrays on your hardware:

   https://sourceforge.net/projects/opengrads/files/grads1-windows/1.9.0-2/

(I just realized that we never released v1.10.r2.oga for Windows...)

    Arlindo



--
Arlindo da Silva
dasilva at alum.mit.edu
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From zmumba at YAHOO.COM  Mon Nov 16 10:16:24 2009
From: zmumba at YAHOO.COM (zilore mumba)
Date: Mon, 16 Nov 2009 07:16:24 -0800
Subject: writing NetCDF from GRIB2
Message-ID: <MON.16.NOV.2009.071624.0800.>

Thanks Leonardo and Heiner for the information. I am in touch with ECMWF and am sure they will assist me. I also downloaded the CDO software, but since it apparently works on UNIX I still have to see how to use it.
Incidentally I found the NCL software has an ncl_convert2nc tool which also does the job, but the explanation of the syntax is not very clear in their documentation. When I convert, when I display winds the chart does not change whether I change time or level.
Thanks very much, eventually I will be there.
Zilore




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From jma at COLA.IGES.ORG  Mon Nov 16 10:27:00 2009
From: jma at COLA.IGES.ORG (Jennifer Adams)
Date: Mon, 16 Nov 2009 10:27:00 -0500
Subject: writing grib2 to NetCDF
In-Reply-To: <380950.87978.qm@web57002.mail.re3.yahoo.com>
Message-ID: <MON.16.NOV.2009.102700.0500.>

Dear Zilore --
wgrib and grib2ctl are not designed for use with GRIB2. Try wgrib2 and
g2ctl instead. Alternatively, you can use the output from grib2scan (a
utility in the GrADS distribution) that will tell you the grib2 codes
that are required for a GrADS descriptor file. If the data are on a
thinned grid, you'll definitely need g2ctl to create the pdef file for
you. You should be able to read this file with GrADS in its native
format.
--Jennifer


On Nov 13, 2009, at 4:11 AM, zilore mumba wrote:

> Dear Grads users,
> Help sought if possible.
> I have data in GRIB2 format from ECMWF. Because of the double
> headers in the data (complex packing), wgrib is not able to decode
> it propoerly hence not possible to make a ctl with grib2ctl.pl.
> What I do is to decode the data with the ECMWF GRIB_API decoder and
> rewrite it in binary for grads with fortran. This works fine. I
> thought another alternative would be to convert the GRIB2 to NetCDF.
> I have checked the listserver but did not find anything.
> Is such a conversion possible?
> Thanks for assistance
> Zilore
>
>

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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From jdduda at IASTATE.EDU  Mon Nov 16 11:12:20 2009
From: jdduda at IASTATE.EDU (Jeffrey Duda)
Date: Mon, 16 Nov 2009 10:12:20 -0600
Subject: Isotachs in GrADS
In-Reply-To: <4AFF346F.3000002@student.canterbury.ac.nz>
Message-ID: <MON.16.NOV.2009.101220.0600.>

If you have u and v wind components in your binary files, then all you need
to do is type "d mag(u,v)" (assuming u and v are the names of your zonal and
meridional wind components).  Make sure gxout is set to contour or shaded.
You can simply plot isotachs for just one or the other of the wind
components by just typing in "d u" or "d v" also. Hope this helps.

Jeff Duda

On Sat, Nov 14, 2009 at 4:51 PM, Basit Khan
<bak41 at student.canterbury.ac.nz>wrote:

> Hi friends,
> I am new to GrADS. Just wondering does anybody know how to plot isotachs
> inGrADS.
> Cheers,
>
> --
> ---
> Basit A. Khan
> PhD Candidate
> Centre for Atmospheric Research
> Department of Geography
> University of Canterbury  Te Whare Wananga o Waitaha Private Bag 4800
> Christchurch 8020, New Zealand
> Tel: (643) 364 2987 Ext. 3088
> Fax: (643) 364 2907
> bak41 at student.canterbury.ac.nz
>



--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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From leonardo.silva at CPTEC.INPE.BR  Mon Nov 16 11:59:11 2009
From: leonardo.silva at CPTEC.INPE.BR (Leonardo Diogo)
Date: Mon, 16 Nov 2009 14:59:11 -0200
Subject: writing NetCDF from GRIB2
In-Reply-To: <519232.48014.qm@web57001.mail.re3.yahoo.com>
Message-ID: <MON.16.NOV.2009.145911.0200.>

Zilore

You're welcome. If you need help in installing the cdo in a Linux
platform I can help you. Is not so difficult to do that.

Leonardo
= = = = = = = = = =
Quoting zilore mumba <zmumba at YAHOO.COM>:

> Thanks Leonardo and Heiner for the information. I am in touch with
> ECMWF and am sure they will assist me. I also downloaded the CDO
> software, but since it apparently works on UNIX I still have to see
> how to use it.
> Incidentally I found the NCL software has an ncl_convert2nc tool
> which also does the job, but the explanation of the syntax is not
> very clear in their documentation. When I convert, when I display
> winds the chart does not change whether I change time or level.
> Thanks very much, eventually I will be there.
> Zilore
>
>
>
>
>


From antoyc at YAHOO.COM  Tue Nov 17 03:09:30 2009
From: antoyc at YAHOO.COM (Antoy Chang)
Date: Tue, 17 Nov 2009 00:09:30 -0800
Subject: my script error
Message-ID: <TUE.17.NOV.2009.000930.0800.>

Dear All,
Can someone here help me this script error, my script is as below :

'd wdr' 
wind_dirn.incr=subwrd result,4) 
if wind_dirn.incr=9.999e+20 
wind_dirn.incr="undefined" 
else 
'define wind_dirn.incr = math_nint(wind_dirn.incr)' 
endif 
* 

* 
*determine the resultant wind for three output times 
pi = 3.1415926 
d2r = pi/180 
r2d = 1/d2r 
fmt = '%-6.4f' 

wamv=cos(0.0174532*wdr)*w10 -----> Line 454 
wamu=sin(0.0174532*wdr)*w10

'd sum(wamu,t= 'y',t= 'y+2')' 
udirs=sublin(result,2) 
udir=subwrd(udirs,4)/3 

?The error message : 
?
DEFINE error: Name too long; missing '='
Non numeric args to numeric operation
Error occurred processing function arguments
????? Error occurred on line 454
????? In file E\KC\WORK\Adhoc_~1\Langkawi.gs
ga->
?


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From zmumba at YAHOO.COM  Tue Nov 17 06:22:02 2009
From: zmumba at YAHOO.COM (zilore mumba)
Date: Tue, 17 Nov 2009 03:22:02 -0800
Subject: writing grib2 to NetCDF
In-Reply-To: <91BE0A4F-60AC-444D-BCCB-773DA8F10739@cola.iges.org>
Message-ID: <TUE.17.NOV.2009.032202.0800.>

Thank you Jennifer for the precision. In fact the data is actually in Grib1 because WGRIB2 does not work on it but wgrib does, though with an error due to double headers.



--- On Mon, 11/16/09, Jennifer Adams <jma at COLA.IGES.ORG> wrote:

From: Jennifer Adams <jma at COLA.IGES.ORG>
Subject: Re: writing grib2 to NetCDF
To: GRADSUSR at LIST.CINECA.IT
Date: Monday, November 16, 2009, 5:27 PM

Dear Zilore --?wgrib and grib2ctl are not designed for use with GRIB2. Try wgrib2 and g2ctl instead. Alternatively, you can use the output from grib2scan (a utility in the GrADS distribution) that will tell you the grib2 codes that are required for a GrADS descriptor file. If the data are on a thinned grid, you'll definitely need g2ctl to create the pdef file for you. You should be able to read this file with GrADS in its native format.?--Jennifer

On Nov 13, 2009, at 4:11 AM, zilore mumba wrote:
Dear Grads users,
Help sought if possible.
I have data in GRIB2 format from ECMWF. Because of the double headers in the data (complex packing), wgrib is not able to decode it propoerly hence not possible to make a ctl with grib2ctl.pl.
What I do is to decode the data with the ECMWF GRIB_API decoder and rewrite it in binary for grads with fortran. This works fine. I thought another alternative would be to convert the GRIB2 to NetCDF.
I have checked the listserver but did not find anything.
Is such a conversion possible?
Thanks for assistance
Zilore


 
 --Jennifer M. AdamsIGES/COLA4041 Powder Mill Road, Suite 302Calverton, MD 20705jma at cola.iges.org

 



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From sushantpuranik at GMAIL.COM  Tue Nov 17 06:53:28 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Tue, 17 Nov 2009 17:23:28 +0530
Subject: How to make plot of maximum wind
Message-ID: <TUE.17.NOV.2009.172328.0530.>

Hello
I wants to make plot of maximum wind with the help of ECMWF data. Is there
anyone who knows how to make such plots?


--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From jmssnyder at UCDAVIS.EDU  Tue Nov 17 15:31:44 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Tue, 17 Nov 2009 21:31:44 +0100
Subject: Making Trajectories with data composites
Message-ID: <TUE.17.NOV.2009.213144.0100.>

I have a *.nc data set that is a composite of wind data based on certain
phases of the Madden Julian Oscillation and I was interesting in looking at
the backwards trajectories of air parcels coming from Lake Tahoe in such a
scenario.  I have been trying to work with the script traj.gs, but GrADS
said that TDEF is undefined.  How do I fix this and make a trajectory?

Thanks,

Jason


From bcodina at UB.EDU  Tue Nov 17 16:45:13 2009
From: bcodina at UB.EDU (Bernat Codina)
Date: Tue, 17 Nov 2009 22:45:13 +0100
Subject: Making Trajectories with data composites
In-Reply-To: <20091117203305.2D7E320188@mx2.cineca.it>
Message-ID: <TUE.17.NOV.2009.224513.0100.>

2009/11/17 Jason Snyder <jmssnyder at ucdavis.edu>:

> I have a *.nc data set that is a composite of wind data based on certain
> phases of the Madden Julian Oscillation and I was interesting in looking at
> the backwards trajectories of air parcels coming from Lake Tahoe in such a
> scenario. ? I have been trying to work with the script traj.gs, but GrADS
> said that TDEF is undefined. ? How do I fix this and make a trajectory?

Data needs to be arranged in time steps, otherwise there is no way to
calculate trajectories. Therefore, a TDEF field has to be defined in
your ctl file. Once you have fixed this, set the variable time to the
instant at which you want to compute the backwards trajectory (e.g.
SET T 27), run "traj.gs lon_ini lat_ini" and you'll get the path of
the parcel that was at point (lon_ini, lat_ini) at time t=27, defined
as a set of points from t=27 to t=1.

Bernat Codina
Dept. d'Astronomia i Meteorologia
Universitat de Barcelona


From luis.blacutt at GMAIL.COM  Tue Nov 17 17:07:28 2009
From: luis.blacutt at GMAIL.COM (luis blacutt)
Date: Tue, 17 Nov 2009 18:07:28 -0400
Subject: error in xdef ctl file
Message-ID: <TUE.17.NOV.2009.180728.0400.>

Dear Grads users
I'm doing my first ctl file, it will have two variables, so far I have the
following commands:

dset /home/lucho/Desktop/GlueNC/bolbia.pag%x1%mc.%.nc
options template
undef 9.999E+20
title baseline 60-90
*produced by LFA
dtype netcdf
options yrev
ydef 82 linear -33.640000 2.0000
xdef 97 linear -84.120000 -41.880000
tdef 1 linear 00Z01jul1961 1mo
zdef 1 linear 1 1
vars 2
total_precipita 0 216,1,0  **
temperature_at_ 0 216,1,0  **
ENDVARS

When I try to run it, it gives me the following error message

Scanning description file:  baseline.ctl
Open Error:  Missing or invalid dimension increment value
  --> The invalid description file record is:
  --> xdef 97 linear -84.120000 -41.880000
  The data file was not opened.

MyI checked by creating a grib file and those are the right numbers, the
domain is for Southamerica. What am I missing?
Regards
Luis
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From klevey at CUSTOMWEATHER.COM  Tue Nov 17 17:27:53 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Tue, 17 Nov 2009 14:27:53 -0800
Subject: error in xdef ctl file
In-Reply-To: <5825ce3f0911171407h4c22c886ybc8cb020c4682ab8@mail.gmail.com>
Message-ID: <TUE.17.NOV.2009.142753.0800.>

Luis,

the 5th argument is the data resolution, i.e. the incremental value, so if your x grid is 2 degrees, then your line should look like this

> xdef 97 linear -84.120000 2.00



Your y increment is set to 2 degrees, so I am assuming your data resolution is 2x2 degrees.

Here is the documentation: 

XDEF xnum mapping <additional arguments>

back to top
This entry defines the grid point values for the X dimension, or longitude. The first argument, xnum, specifies the number of grid points in the X direction. xnum must be an integer >= 1. mapping defines the method by which longitudes are assigned to X grid points. There are two options for mapping:

LINEAR    Linear mapping 
LEVELS    Longitudes specified individually
The LINEAR mapping method requires two additional arguments: start and increment. start is a floating point value that indicates the longitude at grid point X=1. Negative values indicate western longitudes. increment is the spacing between grid point values, given as a positive floating point value.

The LEVELS mapping method requires one additional argument, value-list, which explicitly specifies the longitude value for each grid point. value-list should contain xnum floating point values. It may continue into the next record in the descriptor file, but note that records may not have more than 255 characters. There must be at least 2 levels in value-list; otherwise use the LINEAR method.

Here are some examples:

XDEF    144     LINEAR  0.0 2.5
XDEF    72      LINEAR  0.0 5.0
XDEF    12       LEVELS 0 30 60 90 120 150 180 210 240 270 300 330
XDEF    12       LEVELS 15 45 75 105 135 165 195 225 255 285 315 345


Regards,

Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape Town)
Director of Meteorological Operations
CustomWeather, Inc.
San Francisco, California, USA

"Taking the World by Storm!"

http://www.customweather.com
http://www.myforecast.com
http://www.1stweather.com

cell: 415-794-0411
work: 415-777-3566
email: klevey at customweather.com

On Nov 17, 2009, at 11/17/09 - 2:07 PM, luis blacutt wrote:

> Dear Grads users
> I'm doing my first ctl file, it will have two variables, so far I have the following commands:
> 
> dset /home/lucho/Desktop/GlueNC/bolbia.pag%x1%mc.%.nc
> options template
> undef 9.999E+20
> title baseline 60-90
> *produced by LFA
> dtype netcdf
> options yrev
> ydef 82 linear -33.640000 2.0000
> xdef 97 linear -84.120000 -41.880000
> tdef 1 linear 00Z01jul1961 1mo
> zdef 1 linear 1 1
> vars 2
> total_precipita 0 216,1,0  **
> temperature_at_ 0 216,1,0  **
> ENDVARS
> 
> When I try to run it, it gives me the following error message
> 
> Scanning description file:  baseline.ctl
> Open Error:  Missing or invalid dimension increment value
>   --> The invalid description file record is: 
>   --> xdef 97 linear -84.120000 -41.880000
>   The data file was not opened. 
> 
> MyI checked by creating a grib file and those are the right numbers, the domain is for Southamerica. What am I missing?
> Regards
> Luis

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From antoyc at YAHOO.COM  Tue Nov 17 22:11:17 2009
From: antoyc at YAHOO.COM (Antoy Chang)
Date: Tue, 17 Nov 2009 19:11:17 -0800
Subject: my script error
Message-ID: <TUE.17.NOV.2009.191117.0800.>

Dear Jeff,
?
I manage to solve the error but another error is encountered :
?
in my script ;
?
'd ave(wht,t='y',t='y+2')'????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
sigwa=sublin(result,2)??? 
??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
sig_waves=subwrd(sigwa,4)??? 
???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
if sig_waves=9.999e+20??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
SIG.incr="undefined"????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
else????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
fmt = '%4.1f'???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
*SIG.incr=math_format(fmt,sig_waves) 
SIG.incr=math_nint(sig_waves*10.0)? --------> line 543 

if SIG.incr<3
SIG.incr=3
endif? 
SIG.incr=math_format(fmt,SIG.incr/10)
endif???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
SIG=SIG%","%SIG.incr??? 
????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 

'd ave(mpr,t='y',t='y+2')' 

wavper=sublin(result,2)?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
wave_per.incr=subwrd(wavper,4)??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
if wave_per.incr=9.999e+20??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
PER.incr="undefined"????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
else????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
*???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
PER.incr = math_nint(wave_per.incr)
endif???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
PER=PER%","%PER.incr???????
?
?
?
with same?error message as previous one.
?
Thank you very much.
Best Regards,
Antoy????? 

--- On Wed, 11/18/09, Jeffrey Duda <jdduda at iastate.edu> wrote:


From: Jeffrey Duda <jdduda at iastate.edu>
Subject: Re: my script error
To: antoyc at yahoo.com
Date: Wednesday, November 18, 2009, 12:25 AM


Try putting line 454 and the one after it in single quotes.? Since you're using these variables in a display command, they need to be defined outside the script.

Jeff Duda


On Tue, Nov 17, 2009 at 2:09 AM, Antoy Chang <antoyc at yahoo.com> wrote:






Dear All,
Can someone here help me this script error, my script is as below :

'd wdr' 
wind_dirn.incr=subwrd result,4) 
if wind_dirn.incr=9.999e+20 
wind_dirn.incr="undefined" 
else 
'define wind_dirn.incr = math_nint(wind_dirn.incr)' 
endif 
* 

* 
*determine the resultant wind for three output times 
pi = 3.1415926 
d2r = pi/180 
r2d = 1/d2r 
fmt = '%-6.4f' 

wamv=cos(0.0174532*wdr)*w10 -----> Line 454 
wamu=sin(0.0174532*wdr)*w10

'd sum(wamu,t= 'y',t= 'y+2')' 
udirs=sublin(result,2) 
udir=subwrd(udirs,4)/3 

?The error message : 
?
DEFINE error: Name too long; missing '='
Non numeric args to numeric operation
Error occurred processing function arguments
????? Error occurred on line 454
????? In file E\KC\WORK\Adhoc_~1\Langkawi.gs
ga->
?



-- 
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda



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From jdduda at IASTATE.EDU  Tue Nov 17 22:40:21 2009
From: jdduda at IASTATE.EDU (Jeffrey Duda)
Date: Tue, 17 Nov 2009 21:40:21 -0600
Subject: my script error
In-Reply-To: <232731.48362.qm@web33108.mail.mud.yahoo.com>
Message-ID: <TUE.17.NOV.2009.214021.0600.>

Antoy,
In your bold line (543), the variable "sig_waves" appears to have been
obtained using the subwrd statement from a line of text output from another
command.  Thus, the variable sig_waves is being stored as a string
(character/text) and not a number.  To get around this, simply put sig_waves
in single quotes in line 543.  See if that works.

Note also that if you do this anywhere else in the script, you'll need to
surround those variables with single quotes as well to avoid this same
problem.

Jeff

On Tue, Nov 17, 2009 at 9:11 PM, Antoy Chang <antoyc at yahoo.com> wrote:

> Dear Jeff,
>
> I manage to solve the error but another error is encountered :
>
> in my script ;
>
> 'd
> ave(wht,t='y',t='y+2')'
>
>
>
>
>
> sigwa=sublin(result,2)
>
>
> sig_waves=subwrd(sigwa,4)
>
>
> if
> sig_waves=9.999e+20
>
> SIG.incr="undefined"
>
> else
>
> fmt =
> '%4.1f'
>
> *SIG.incr=math_format(fmt,sig_waves)
> *SIG.incr=math_nint(sig_waves*10.0)  --------> line 543
> *
> if SIG.incr<3
> SIG.incr=3
> endif
> SIG.incr=math_format(fmt,SIG.incr/10)
> endif
>
> SIG=SIG%","%SIG.incr
>
>
>
> 'd ave(mpr,t='y',t='y+2')'
>
> wavper=sublin(result,2)
>
> wave_per.incr=subwrd(wavper,4)
>
> if
> wave_per.incr=9.999e+20
>
> PER.incr="undefined"
>
> else
>
> *
>
> PER.incr = math_nint(wave_per.incr)
> endif
>
> PER=PER%","%PER.incr
>
>
>
> with same error message as previous one.
>
> Thank you very much.
> Best Regards,
> Antoy
>
> --- On Wed, 11/18/09, Jeffrey Duda <jdduda at iastate.edu> wrote:
>
>
> From: Jeffrey Duda <jdduda at iastate.edu>
> Subject: Re: my script error
> To: antoyc at yahoo.com
> Date: Wednesday, November 18, 2009, 12:25 AM
>
>
>
> Try putting line 454 and the one after it in single quotes.  Since you're
> using these variables in a display command, they need to be defined outside
> the script.
>
> Jeff Duda
>
>
> On Tue, Nov 17, 2009 at 2:09 AM, Antoy Chang <antoyc at yahoo.com> wrote:
>
>
>
>
>
>
> Dear All,
> Can someone here help me this script error, my script is as below :
>
> 'd wdr'
> wind_dirn.incr=subwrd result,4)
> if wind_dirn.incr=9.999e+20
> wind_dirn.incr="undefined"
> else
> 'define wind_dirn.incr = math_nint(wind_dirn.incr)'
> endif
> *
>
> *
> *determine the resultant wind for three output times
> pi = 3.1415926
> d2r = pi/180
> r2d = 1/d2r
> fmt = '%-6.4f'
>
> wamv=cos(0.0174532*wdr)*w10 -----> Line 454
> wamu=sin(0.0174532*wdr)*w10
>
> 'd sum(wamu,t= 'y',t= 'y+2')'
> udirs=sublin(result,2)
> udir=subwrd(udirs,4)/3
>
>  The error message :
>
> DEFINE error: Name too long; missing '='
> Non numeric args to numeric operation
> Error occurred processing function arguments
>       Error occurred on line 454
>       In file E\KC\WORK\Adhoc_~1\Langkawi.gs
> ga->
>
>
>
>
> --
> Jeff Duda
> Iowa State University
> Meteorology Graduate Student
> 3134 Agronomy Hall
> www.meteor.iastate.edu/~jdduda <http://www.meteor.iastate.edu/%7Ejdduda>
>
>


--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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From klevey at CUSTOMWEATHER.COM  Tue Nov 17 22:52:20 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Tue, 17 Nov 2009 19:52:20 -0800
Subject: NETCDF descriptor file problem: gadsdf: SDF file does not have
 any non-coordinate variables.
Message-ID: <TUE.17.NOV.2009.195220.0800.>

TUE 17NOV09: 1945PST

I am having problems opening trying to open a netcdf file of elevation data created by GMT. I am getting an error I've never seen before and don't understand.

The output from ncdump -h is:

netcdf topo2 {
dimensions:
        lat = 101 ;
        lon = 151 ;
variables:
        double lat(lat) ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
                lat:actual_range = 36.9, 37. ;
        double lon(lon) ;
                lon:long_name = "longitude" ;
                lon:units = "degrees_north" ;
                lon:actual_range = -120.18, -120.03 ;
        float elevation(lat, lon) ;
                elevation:long_name = "elevation" ;
                elevation:units = "meters" ;
                elevation:_FillValue = -999.f ;
                elevation:actual_range = 57.8879890441895, 96.9689636230469 ;

// global attributes:
                :Conventions = "COARDS/CF-1.0" ;
                :title = "../grids/madera/mapdata/topo/topo.grd" ;
                :history = "grdsample -R-120.18/-120.03/36.90/37 -I0.06m ../grids/DATA/tmp/madera_topo250.grd -G../grids/madera/mapdata/topo/topo.grd" ;
                :GMT_version = "4.5.0 [64-bit]" ;
}


My CTL file is as follows:

DSET /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
TITLE This is a sample USL grid box for Central California
UNDEF -9999
XDEF lon 151 LINEAR -120.18 0.001
YDEF lat 101 LINEAR 36.9 0.001
VARS 3
alt=>elevation 1 99 Altitude in meters
lon=>lon 1 99 longitude
lat=>lat 1 99  Latitude
ENDVARS

However, here is the output I get when opening the CTL file (GRADS Version 2.0.a7.oga.2)

ga-> xdfopen usl_topo.ctl
Scanning Descriptor File:  usl_topo.ctl
SDF file has no discernable time coordinate -- using default values.
gadsdf: SDF file does not have any non-coordinate variables.
SDF Descriptor file usl_topo.ctl was not successfully opened & parsed.

Obviously I am doing something wrong here. I've had success before opening up WRF netcdf data files using this method, but if anyone has any suggestions here, I'd love to hear from you.

Thanks.

Regards,

Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape Town)
Director of Meteorological Operations
CustomWeather, Inc.
San Francisco, California, USA

"Taking the World by Storm!"

http://www.customweather.com
http://www.myforecast.com
http://www.1stweather.com

cell: 415-794-0411
work: 415-777-3566
email: klevey at customweather.com


From arlindo.dasilva at GMAIL.COM  Tue Nov 17 23:49:09 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Tue, 17 Nov 2009 23:49:09 -0500
Subject: NETCDF descriptor file problem: gadsdf: SDF file does not
 have any non-coordinate variables.
In-Reply-To: <5D2DB2E2-6753-4DF1-8B67-A01DE868F418@customweather.com>
Message-ID: <TUE.17.NOV.2009.234909.0500.>

On Tue, Nov 17, 2009 at 10:52 PM, Kevin M Levey <klevey at customweather.com>wrote:

> TUE 17NOV09: 1945PST
>
> I am having problems opening trying to open a netcdf file of elevation data
> created by GMT. I am getting an error I've never seen before and don't
> understand.
>
> The output from ncdump -h is:
>
> netcdf topo2 {
> dimensions:
>        lat = 101 ;
>        lon = 151 ;
> variables:
>        double lat(lat) ;
>                lat:long_name = "latitude" ;
>                lat:units = "degrees_north" ;
>                lat:actual_range = 36.9, 37. ;
>        double lon(lon) ;
>                lon:long_name = "longitude" ;
>                lon:units = "degrees_north" ;
>                lon:actual_range = -120.18, -120.03 ;
>        float elevation(lat, lon) ;
>                elevation:long_name = "elevation" ;
>                elevation:units = "meters" ;
>                elevation:_FillValue = -999.f ;
>                elevation:actual_range = 57.8879890441895, 96.9689636230469
> ;
>
> // global attributes:
>                :Conventions = "COARDS/CF-1.0" ;
>                :title = "../grids/madera/mapdata/topo/topo.grd" ;
>                :history = "grdsample -R-120.18/-120.03/36.90/37 -I0.06m
> ../grids/DATA/tmp/madera_topo250.grd
> -G../grids/madera/mapdata/topo/topo.grd" ;
>                :GMT_version = "4.5.0 [64-bit]" ;
> }
>
>
> My CTL file is as follows:
>
> DSET /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
> TITLE This is a sample USL grid box for Central California
> UNDEF -9999
> XDEF lon 151 LINEAR -120.18 0.001
> YDEF lat 101 LINEAR 36.9 0.001
> VARS 3
> alt=>elevation 1 99 Altitude in meters
> lon=>lon 1 99 longitude
> lat=>lat 1 99  Latitude
> ENDVARS
>
>
Try eliminating lat/lon from the variable list; these are 1D coordinate
variables:

VARS 1
alt=>elevation 1 99 Altitude in meters
ENDVARS

Better yet, have you tried opening this netcdf file directly with "sdfopen"?

ga-> sdfopen /prod/custom/Input/modelplots/GRADS/reference/topo2.grd

    Arlindo


> However, here is the output I get when opening the CTL file (GRADS Version
> 2.0.a7.oga.2)
>
> ga-> xdfopen usl_topo.ctl
> Scanning Descriptor File:  usl_topo.ctl
> SDF file has no discernable time coordinate -- using default values.
> gadsdf: SDF file does not have any non-coordinate variables.
> SDF Descriptor file usl_topo.ctl was not successfully opened & parsed.
>
> Obviously I am doing something wrong here. I've had success before opening
> up WRF netcdf data files using this method, but if anyone has any
> suggestions here, I'd love to hear from you.
>
> Thanks.
>
> Regards,
>
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape
> Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
>
> "Taking the World by Storm!"
>
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
>
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
>



--
Arlindo da Silva
dasilva at alum.mit.edu
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From antoyc at YAHOO.COM  Wed Nov 18 01:16:19 2009
From: antoyc at YAHOO.COM (Antoy Chang)
Date: Tue, 17 Nov 2009 22:16:19 -0800
Subject: my script error
In-Reply-To: <c0f1d7890911171940s384f06c4v492d6aaf30d8534e@mail.gmail.com>
Message-ID: <TUE.17.NOV.2009.221619.0800.>

Thank you very much Jeff.

Antoy.

--- On Wed, 11/18/09, Jeffrey Duda <jdduda at IASTATE.EDU> wrote:

From: Jeffrey Duda <jdduda at IASTATE.EDU>
Subject: Re: my script error
To: GRADSUSR at LIST.CINECA.IT
Date: Wednesday, November 18, 2009, 11:40 AM

Antoy,
In
your bold line (543), the variable "sig_waves" appears to have been
obtained using the subwrd statement from a line of text output from
another command. Thus, the variable sig_waves is being stored as a
string (character/text) and not a number. To get around this, simply
put sig_waves in single quotes in line 543. See if that works.


Note also that if you do this anywhere else in the script, you'll
need to surround those variables with single quotes as well to avoid
this same problem.

Jeff

On Tue, Nov 17, 2009 at 9:11 PM, Antoy Chang <antoyc at yahoo.com> wrote:


Dear Jeff,

I manage to solve the error but another error is encountered :

in my script ;

'd
ave(wht,t='y',t='y+2')'


sigwa=sublin(result,2)


sig_waves=subwrd(sigwa,4)


if
sig_waves=9.999e+20
SIG.incr="undefined"
else
fmt = '%4.1f'
*SIG.incr=math_format(fmt,sig_waves)
SIG.incr=math_nint(sig_waves*10.0)  --------> line 543


if
 SIG.incr<3
SIG.incr=3
endif
SIG.incr=math_format(fmt,SIG.incr/10)
endif

SIG=SIG%","%SIG.incr


'd ave(mpr,t='y',t='y+2')'


wavper=sublin(result,2)

wave_per.incr=subwrd(wavper,4)
if wave_per.incr=9.999e+20
PER.incr="undefined"
else
*
PER.incr =
 math_nint(wave_per.incr)
endif
PER=PER%","%PER.incr



with same error message as previous one.

Thank you very much.
Best Regards,
Antoy

--- On Wed, 11/18/09, Jeffrey Duda <jdduda at iastate.edu> wrote:


From: Jeffrey Duda <jdduda at iastate.edu>

Subject: Re: my script error
To: antoyc at yahoo.com
Date: Wednesday, November 18, 2009, 12:25 AM


Try
putting line 454 and the one after it in single quotes. Since you're
using these variables in a display command, they need to be defined
outside the script.


Jeff Duda


On Tue, Nov 17, 2009 at 2:09 AM, Antoy Chang <antoyc at yahoo.com> wrote:






Dear All,
Can someone here help me this script error, my script is as below :


'd wdr'
wind_dirn.incr=subwrd result,4)
if wind_dirn.incr=9.999e+20
wind_dirn.incr="undefined"
else
'define wind_dirn.incr = math_nint(wind_dirn.incr)'
endif
*


*
*determine the resultant wind for three output times
pi = 3.1415926
d2r = pi/180

r2d = 1/d2r
fmt = '%-6.4f'

wamv=cos(0.0174532*wdr)*w10 -----> Line 454
wamu=sin(0.0174532*wdr)*w10

'd sum(wamu,t= 'y',t= 'y+2')'
udirs=sublin(result,2)

udir=subwrd(udirs,4)/3

 The error message :

DEFINE error: Name too long; missing '='
Non numeric args to numeric operation
Error occurred processing function arguments
      Error occurred on line 454

      In file E\KC\WORK\Adhoc_~1\Langkawi.gs
ga->




--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda







--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda





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From jmssnyder at UCDAVIS.EDU  Wed Nov 18 01:42:15 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Wed, 18 Nov 2009 07:42:15 +0100
Subject: converting data to *.ctl format for use with traj.gs
Message-ID: <WED.18.NOV.2009.074215.0100.>

I have a NetCDF data set that is a composite of wind data based on certain
phases of the Madden Julian Oscillation and I was interested in looking at
the backwards trajectories of air parcels coming into Lake Tahoe in such a
scenario.  I have been trying to work with the script traj.gs, but GrADS
said that TDEF is undefined.  I was then told that I need to use a .ctl
file, but how do I convert data in NetCDF format to that that can be used
in a .ctl file which I would need to run the script traj.gs

Thanks,

Jason


From amjadozi at GMAIL.COM  Wed Nov 18 02:48:23 2009
From: amjadozi at GMAIL.COM (Muhammad Amjad)
Date: Wed, 18 Nov 2009 12:48:23 +0500
Subject: Windvectormap
In-Reply-To: <8562142e0911150840s5500d4e9lc7820e0cd039e967@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.124823.0500.>

Dear dipak,

I think you are right............

Amjad.






On Sun, Nov 15, 2009 at 9:40 PM, dipak sahu <dipakmath at gmail.com> wrote:

> Dear Amjad
>      Is it atan2(u,v).........or atan2(v,u)..............
>      I hope it's atan2(v,u)........
>
> regards
> dipak
>
> On Thu, Nov 12, 2009 at 5:46 PM, Muhammad Amjad <amjadozi at gmail.com>wrote:
>
>> Dear Chris,
>>
>> Could you please check with the following formula:
>> wdir=atan2(u,v)/0.01745329 +180
>> The size of wind represents the wind speed. So, I don't think the dispariy
>> among the vectors can be removed.
>>
>> Cheers,
>> Amjad.
>>
>>
>>
>> On 11/9/09, Chris Hayes <c.hayes at weeronline.nl> wrote:
>>>
>>> dear group,
>>>
>>> I need to plot the wind directions for stations with equally sized
>>> arrows.
>>>
>>> My dataset contains the direction in degrees (0-360).
>>>
>>> I use the gxout=vector map which requires a u and a v vector component
>>> (i.e. the vertical and horizontal vector component).
>>>
>>> u
>>> |      /winddir
>>> |    /
>>> |  /
>>> |/___ v
>>>
>>>
>>> I calculate u as -sin(winddir * pi/180)
>>> I calculate v as -cos(winddir * pi/180)
>>>
>>> resulting in the display-command    ' -8*(sin(winddir * 0.0175)) ;
>>> -8*(cos(winddir * 0.0175)) '
>>> (where 8 makes the size of the arrow, which usually represents windspeed
>>> but here is desired to be constant)
>>>
>>>
>>> The direction of the arrows looks fine.
>>> But some maps have only tiny arrows and some maps have only longtailed
>>> arrows.
>>> I cannot see a pattern. I have no mixed maps with tiny and large arrows.
>>>
>>> Should I change my formula, or the way I give the display command?
>>>
>>> thanks,
>>> Chris
>>>
>>>
>>>
>>
>
>
>
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From muhammad.rahiz at OUCE.OX.AC.UK  Wed Nov 18 03:11:51 2009
From: muhammad.rahiz at OUCE.OX.AC.UK (Muhammad Rahiz)
Date: Wed, 18 Nov 2009 08:11:51 +0000
Subject: converting data to *.ctl format for use with traj.gs
In-Reply-To: <20091118064336.EC87020936@mx2.cineca.it>
Message-ID: <WED.18.NOV.2009.081151.0000.>

Use xconv utility
http://badc.nerc.ac.uk/help/software/xconv/

Muhammad Rahiz  |  Doctoral Student in Regional Climate Modeling
Climate Research Laboratory, School of Geography & the Environment
Oxford University Centre for the Environment, University of Oxford
South Parks Road, Oxford, OX1 3QY, United Kingdom
Tel: +44 (0)1865-285194  Mobile: +44 (0)7854-625974
Email: muhammad.rahiz at ouce.ox.ac.uk



Jason Snyder wrote:
> I have a NetCDF data set that is a composite of wind data based on certain
> phases of the Madden Julian Oscillation and I was interested in looking at
> the backwards trajectories of air parcels coming into Lake Tahoe in such a
> scenario.  I have been trying to work with the script traj.gs, but GrADS
> said that TDEF is undefined.  I was then told that I need to use a .ctl
> file, but how do I convert data in NetCDF format to that that can be used
> in a .ctl file which I would need to run the script traj.gs
>
> Thanks,
>
> Jason
>


From luis.blacutt at GMAIL.COM  Wed Nov 18 09:21:25 2009
From: luis.blacutt at GMAIL.COM (luis blacutt)
Date: Wed, 18 Nov 2009 10:21:25 -0400
Subject: error in xdef ctl file
In-Reply-To: <2CC20BEA-66FE-4824-80DE-1D1F6C54F4EF@customweather.com>
Message-ID: <WED.18.NOV.2009.102125.0400.>

Thanks Kevin,

I changed the ctl file to:
dset /home/lucho/Desktop/GlueNC/bolbia.pmg1jul.03236.rr8.reg.nc
undef 9.999E+20
title baseline 60-90
*produced by LFA
dtype netcdf
options yrev
ydef 82 linear -33.640000 0.439000
xdef 97 linear -84.120000 0.440000
tdef 1 linear 00Z01jul1961 1mo
zdef 1 linear 1 1
vars 1
temperature_at_ 0 216,1,0  **
ENDVARS

now I got another error message

gancsetup error: Variable temperature_at_ not in netcdf file
Data Request Error:  Error for variable 'temperature_at_'
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = temperature_at_

Luis

On Tue, Nov 17, 2009 at 6:27 PM, Kevin M Levey <klevey at customweather.com>wrote:

> Luis,
>
> the 5th argument is the data resolution, i.e. the incremental value, so if
> your x grid is 2 degrees, then your line should look like this
>
> xdef 97 linear -84.120000 2.00
>
>
>
> Your y increment is set to 2 degrees, so I am assuming your data resolution
> is 2x2 degrees.
>
> Here is the documentation:
>
> *XDEF* *xnum mapping <additional arguments>*
> back to top <http://grads.iges.org/grads/gadoc/descriptorfile.html#TOP>
>
> This entry defines the grid point values for the X dimension, or longitude.
> The first argument, *xnum*, specifies the number of grid points in the X
> direction. *xnum* must be an integer >= 1. *mapping* defines the method by
> which longitudes are assigned to X grid points. There are two options for
> *mapping*:
>
>    LINEAR    Linear mapping
>    LEVELS    Longitudes specified individually
>
> The LINEAR mapping method requires two additional arguments: *start* and *
> increment*. *start* is a floating point value that indicates the longitude
> at grid point X=1. Negative values indicate western longitudes. *increment
> * is the spacing between grid point values, given as a positive floating
> point value.
>
> The LEVELS mapping method requires one additional argument, *value-list*,
> which explicitly specifies the longitude value for each grid point. *
> value-list* should contain *xnum* floating point values. It may continue
> into the next record in the descriptor file, but note that records may not
> have more than 255 characters. There must be at least 2 levels in *
> value-list*; otherwise use the LINEAR method.
>
> Here are some examples:
>
>     XDEF 144 LINEAR 0.0 2.5  XDEF 72 LINEAR 0.0 5.0  XDEF 12 LEVELS 0 30
>    60 90 120 150 180 210 240 270 300 330  XDEF 12 LEVELS 15 45 75 105 135
>    165 195 225 255 285 315 345
>
>
>
> Regards,
>
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape
> Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
>
> "Taking the World by Storm!"
>
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
>
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
>
> On Nov 17, 2009, at 11/17/09 - 2:07 PM, luis blacutt wrote:
>
> Dear Grads users
> I'm doing my first ctl file, it will have two variables, so far I have the
> following commands:
>
> dset /home/lucho/Desktop/GlueNC/bolbia.pag%x1%mc.%.nc
> options template
> undef 9.999E+20
> title baseline 60-90
> *produced by LFA
> dtype netcdf
> options yrev
> ydef 82 linear -33.640000 2.0000
> xdef 97 linear -84.120000 -41.880000
> tdef 1 linear 00Z01jul1961 1mo
> zdef 1 linear 1 1
> vars 2
> total_precipita 0 216,1,0  **
> temperature_at_ 0 216,1,0  **
> ENDVARS
>
> When I try to run it, it gives me the following error message
>
> Scanning description file:  baseline.ctl
> Open Error:  Missing or invalid dimension increment value
>   --> The invalid description file record is:
>   --> xdef 97 linear -84.120000 -41.880000
>   The data file was not opened.
>
> MyI checked by creating a grib file and those are the right numbers, the
> domain is for Southamerica. What am I missing?
> Regards
> Luis
>
>
>
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From dasilva at ALUM.MIT.EDU  Wed Nov 18 09:27:43 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Wed, 18 Nov 2009 09:27:43 -0500
Subject: GrADS Platform Survey
In-Reply-To: <77fcd6b20911111435l4bfc293dn6127e9963b04b8d2@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.092743.0500.>

All,

  For those who have already completed the survey, many thanks.
I'll be posting the results early next week. For those who haven't yet
responded, there is still time for you to give us your feedback; it should
take less than minutes of your time:

https://spreadsheets.google.com/viewform?hl=en&formkey=dGctYWhkdTQyenZGSW40SjVOTGZWOUE6MA

I'd appreciate if you could forward this link to other GrADS users in your
institution who do not subscribe to this mailing list.

   Thank you,

       Arlindo

On Wed, Nov 11, 2009 at 5:35 PM, Arlindo da Silva <dasilva at alum.mit.edu>wrote:

> Dear GrADS Users,
>
>   As we try to prioritize development at the OpenGrADS project, it becomes
> important for us to understand the particular platforms and operating
> systems folks are running GrADS on. Although, some of this information can
> be gathered from download statistics, some other information (such as the
> particular flavor of Linux) cannot. Therefore we designed a very quick
> survey to collect this information. I'd be very appreciative if you could
> spare 5 minutes of your time and complete this short survey:
>
>
> https://spreadsheets.google.com/viewform?hl=en&formkey=dGctYWhkdTQyenZGSW40SjVOTGZWOUE6MA
>
>   In a couple of weeks I'll post the results of the survey on this list.
>
>   Thank you very much for your time.
>
>      Arlindo
>
> --
> Arlindo da Silva
> dasilva at opengrads.org
>



--
Arlindo da Silva
dasilva at alum.mit.edu
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From klevey at CUSTOMWEATHER.COM  Wed Nov 18 10:27:09 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Wed, 18 Nov 2009 07:27:09 -0800
Subject: NETCDF descriptor file problem: gadsdf: SDF file does not
 have any non-coordinate variables.
In-Reply-To: <77fcd6b20911172049x4fd6ea9crc44cab124ce82f16@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.072709.0800.>

Hi Arlindo,

No difference (same message) without the lat/lon variables listed in the CTL file and opening up directly with sdfopen: 

ga-> sdfopen /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
Scanning self-describing file:  /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
gadsdf: SDF file has no discernable X coordinate.

Cheers
Kevin

On Nov 17, 2009, at 11/17/09 - 8:49 PM, Arlindo da Silva wrote:

> 
> 
> On Tue, Nov 17, 2009 at 10:52 PM, Kevin M Levey <klevey at customweather.com> wrote:
> TUE 17NOV09: 1945PST
> 
> I am having problems opening trying to open a netcdf file of elevation data created by GMT. I am getting an error I've never seen before and don't understand.
> 
> The output from ncdump -h is:
> 
> netcdf topo2 {
> dimensions:
>        lat = 101 ;
>        lon = 151 ;
> variables:
>        double lat(lat) ;
>                lat:long_name = "latitude" ;
>                lat:units = "degrees_north" ;
>                lat:actual_range = 36.9, 37. ;
>        double lon(lon) ;
>                lon:long_name = "longitude" ;
>                lon:units = "degrees_north" ;
>                lon:actual_range = -120.18, -120.03 ;
>        float elevation(lat, lon) ;
>                elevation:long_name = "elevation" ;
>                elevation:units = "meters" ;
>                elevation:_FillValue = -999.f ;
>                elevation:actual_range = 57.8879890441895, 96.9689636230469 ;
> 
> // global attributes:
>                :Conventions = "COARDS/CF-1.0" ;
>                :title = "../grids/madera/mapdata/topo/topo.grd" ;
>                :history = "grdsample -R-120.18/-120.03/36.90/37 -I0.06m ../grids/DATA/tmp/madera_topo250.grd -G../grids/madera/mapdata/topo/topo.grd" ;
>                :GMT_version = "4.5.0 [64-bit]" ;
> }
> 
> 
> My CTL file is as follows:
> 
> DSET /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
> TITLE This is a sample USL grid box for Central California
> UNDEF -9999
> XDEF lon 151 LINEAR -120.18 0.001
> YDEF lat 101 LINEAR 36.9 0.001
> VARS 3
> alt=>elevation 1 99 Altitude in meters
> lon=>lon 1 99 longitude
> lat=>lat 1 99  Latitude
> ENDVARS
> 
> 
> Try eliminating lat/lon from the variable list; these are 1D coordinate variables:
> 
> VARS 1
> alt=>elevation 1 99 Altitude in meters
> ENDVARS
> 
> Better yet, have you tried opening this netcdf file directly with "sdfopen"?
> 
> ga-> sdfopen /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
> 
>     Arlindo
>  
> However, here is the output I get when opening the CTL file (GRADS Version 2.0.a7.oga.2)
> 
> ga-> xdfopen usl_topo.ctl
> Scanning Descriptor File:  usl_topo.ctl
> SDF file has no discernable time coordinate -- using default values.
> gadsdf: SDF file does not have any non-coordinate variables.
> SDF Descriptor file usl_topo.ctl was not successfully opened & parsed.
> 
> Obviously I am doing something wrong here. I've had success before opening up WRF netcdf data files using this method, but if anyone has any suggestions here, I'd love to hear from you.
> 
> Thanks.
> 
> Regards,
> 
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
> 
> "Taking the World by Storm!"
> 
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
> 
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
> 
> 
> 
> -- 
> Arlindo da Silva
> dasilva at alum.mit.edu

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From mubashardogar at GMAIL.COM  Wed Nov 18 11:03:26 2009
From: mubashardogar at GMAIL.COM (Mubashar Dogar)
Date: Wed, 18 Nov 2009 08:03:26 -0800
Subject: How to use aave with time-interval
Message-ID: <WED.18.NOV.2009.080326.0800.>

 Dear Wang Lizhi,

You have to make time average to convert your 6 hourly data into daily
means. So use the following define function.

define a= ave ( tmp2m, t=1, t=4)

Then use the following command as per ur requirement

define v=aave(a, lon=110,lon=120,lat=20,lat=30)

other things will remain unchanged.


Regards,


Mubashar


---------------------------------------------------------
Muhammmad Mubashar Ahmad Dogar
Scientific Officer (Climatology Section),
Global Change Impact Studies Centre (GCISC),
NCP complex, Quaid-i-Azam University Campus,
Shahdra road, Islamabad, Pakistan.
Tel:  +92519230226
Mob:+923315144169
email: mubashardogar at yahoo.com
         mubashar.ahmad at gcisc.org.pk
         mubashardogar at gmail.com


--- On *Thu, 12/11/09, Wang Lizhi <wlz at TEA.AC.CN>* wrote:


From: Wang Lizhi <wlz at TEA.AC.CN>
Subject: How to use aave with time-interval
To: GRADSUSR at LIST.CINECA.IT
Date: Thursday, 12 November, 2009, 8:33 PM

Hi, everyone,

I get the ncep2 data set(example flx.ft06.200909), and I can plot a region's
average
temperature curve use following:

open flx.ft06.200909.ctl
set t 1 120
define v=aave( tmp2m, lon=110,lon=120,lat=20,lat=30)
set x 1
set y 1
set z 1
d v

But the curve is plotted at interval 6hour. Now I want to plot the mean
daily
temperature curve, How can I do ?

thanks
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From klevey at CUSTOMWEATHER.COM  Wed Nov 18 12:51:38 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Wed, 18 Nov 2009 09:51:38 -0800
Subject: error in xdef ctl file
In-Reply-To: <5825ce3f0911180621p5347bedfu88e6955c229265d7@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.095138.0800.>

Hi Luis,

You need to describe your variables as such (for example)

alt=>elevation 1 99 Altitude in meters

elevation is the actual name of the variable in my netcdf file, and I map it to a new variable called "alt".

Try something like this for your variable:

temp=>temperature_at_  1 99 Surface Temperature 

Documentation is all in the GRADS user docs (http://grads.iges.org/grads/gadoc/gradcomdxdfopen.html)

DTYPE: 

(GrADS version 1.9) For DTYPE netcdf or hdfsds or hdf5_grid (GrADS version 2.0.a7+) , the units field is a comma-delimited list of the varying dimensions of the variable. Dimensions expressed as x, y, z, or t correspond to the four axes defined by XDEF, YDEF, ZDEF and TDEF. For example, a surface variable such as sea level pressure might look like this:

presSFC=>psfc   0   y,x   Surface Pressure
A time-varying atmospheric variable such as geopotential height might look like this:

Height=>hght   17   t,z,y,x   Geopotential Height (m)
The order of the dimensions listed in the units field does matter. They must describe the shape of the variable as it was written to the SDF data file. For NetCDf files, this information appears in the output from ncdump next to the variable name.

If your data file contains a variable that also varies in a non-world-coordinate dimension (e.g. histogram interval, spectral band, ensemble number) then you can put a non-negative integer in the list of varying dimensions that will become the array index of the extra dimension. For example:

VAR=>hist0   0   0,y,x   First historgram interval for VAR
VAR=>hist1   0   1,y,x   Second historgram interval for VAR
VAR=>hist2   0   2,y,x   Third histogram interval for VAR

Another option in this example would be to fill the unused Z axis with the histogram intervals:

zdef 3 linear 1 1
... 
VAR=>hist   3   z,y,x   VAR Histogram

In this case, it would appear to GrADS that variable 'hist' varies in Z, but the user would have to remember that the Z levels correspond to histogram intervals. The latter technique makes it easier to slice through the data, but is not the most accurate representation. And if you don't have an unsued world-coordinate axis available, then you still have a way to access your data.


Remember to use xdfopen when opening your CTL file and NOT sdfopen.

Cheers
Kevin




On Nov 18, 2009, at 11/18/09 - 6:21 AM, luis blacutt wrote:

> Thanks Kevin,
> 
> I changed the ctl file to:
> dset /home/lucho/Desktop/GlueNC/bolbia.pmg1jul.03236.rr8.reg.nc
> undef 9.999E+20
> title baseline 60-90
> *produced by LFA
> dtype netcdf
> options yrev
> ydef 82 linear -33.640000 0.439000
> xdef 97 linear -84.120000 0.440000
> tdef 1 linear 00Z01jul1961 1mo
> zdef 1 linear 1 1
> vars 1
> temperature_at_ 0 216,1,0  **
> ENDVARS
> 
> now I got another error message
> 
> gancsetup error: Variable temperature_at_ not in netcdf file
> Data Request Error:  Error for variable 'temperature_at_'
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression 
>   Expression = temperature_at_
> 
> Luis
> 
> On Tue, Nov 17, 2009 at 6:27 PM, Kevin M Levey <klevey at customweather.com> wrote:
> Luis,
> 
> the 5th argument is the data resolution, i.e. the incremental value, so if your x grid is 2 degrees, then your line should look like this
> 
>> xdef 97 linear -84.120000 2.00
> 
> 
> 
> Your y increment is set to 2 degrees, so I am assuming your data resolution is 2x2 degrees.
> 
> Here is the documentation: 
> 
> XDEF xnum mapping <additional arguments>
> 
> back to top
> This entry defines the grid point values for the X dimension, or longitude. The first argument, xnum, specifies the number of grid points in the X direction. xnum must be an integer >= 1. mapping defines the method by which longitudes are assigned to X grid points. There are two options for mapping:
> 
> LINEAR    Linear mapping 
> LEVELS    Longitudes specified individually
> The LINEAR mapping method requires two additional arguments: start and increment. start is a floating point value that indicates the longitude at grid point X=1. Negative values indicate western longitudes. increment is the spacing between grid point values, given as a positive floating point value.
> 
> The LEVELS mapping method requires one additional argument, value-list, which explicitly specifies the longitude value for each grid point. value-list should contain xnum floating point values. It may continue into the next record in the descriptor file, but note that records may not have more than 255 characters. There must be at least 2 levels in value-list; otherwise use the LINEAR method.
> 
> Here are some examples:
> 
> XDEF  144     LINEAR  0.0 2.5
> XDEF  72      LINEAR  0.0 5.0
> XDEF  12       LEVELS 0 30 60 90 120 150 180 210 240 270 300 330
> XDEF  12       LEVELS 15 45 75 105 135 165 195 225 255 285 315 345
> 
> 
> Regards,
> 
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
> 
> "Taking the World by Storm!"
> 
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
> 
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
> 
> On Nov 17, 2009, at 11/17/09 - 2:07 PM, luis blacutt wrote:
> 
>> Dear Grads users
>> I'm doing my first ctl file, it will have two variables, so far I have the following commands:
>> 
>> dset /home/lucho/Desktop/GlueNC/bolbia.pag%x1%mc.%.nc
>> options template
>> undef 9.999E+20
>> title baseline 60-90
>> *produced by LFA
>> dtype netcdf
>> options yrev
>> ydef 82 linear -33.640000 2.0000
>> xdef 97 linear -84.120000 -41.880000
>> tdef 1 linear 00Z01jul1961 1mo
>> zdef 1 linear 1 1
>> vars 2
>> total_precipita 0 216,1,0  **
>> temperature_at_ 0 216,1,0  **
>> ENDVARS
>> 
>> When I try to run it, it gives me the following error message
>> 
>> Scanning description file:  baseline.ctl
>> Open Error:  Missing or invalid dimension increment value
>>   --> The invalid description file record is: 
>>   --> xdef 97 linear -84.120000 -41.880000
>>   The data file was not opened. 
>> 
>> MyI checked by creating a grib file and those are the right numbers, the domain is for Southamerica. What am I missing?
>> Regards
>> Luis
> 
> 

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From daniel.maineult at NEUF.FR  Wed Nov 18 14:28:49 2009
From: daniel.maineult at NEUF.FR (Daniel MAINEULT)
Date: Wed, 18 Nov 2009 20:28:49 +0100
Subject: printim
Message-ID: <WED.18.NOV.2009.202849.0100.>

Dear all,? 
? 
Results that I get with printim and a background 
are not correct, why?? 
? 
I use the following command:? 
?'printim 'lab%t%'.png x960 y576 -b fond2.png -t 0'

The background is included well but the black color is not transparent.? 
Thank you for your help.

Dan

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From Ron.Goodson at EC.GC.CA  Wed Nov 18 15:16:32 2009
From: Ron.Goodson at EC.GC.CA (Goodson,Ron [Edm])
Date: Wed, 18 Nov 2009 13:16:32 -0700
Subject: Radius of Curvature script or method
In-Reply-To: A<105719.52680.qm@web88104.mail.re2.yahoo.com>
Message-ID: <WED.18.NOV.2009.131632.0700.>

Hi
 
Just wondering if anybody has a script to calculate radius of curvature
of contour lines drawn in grads.  I'm expecting a "no", but would
appreciate anything that might be out there.
 
thanks
 
ron goodson
environment canada
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From h.meteo.shirazu at GMAIL.COM  Wed Nov 18 15:55:34 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Wed, 18 Nov 2009 14:55:34 -0600
Subject: colored vector
Message-ID: <WED.18.NOV.2009.145534.0600.>

Hi all user
do anyone know how we can display colored vector ?
thanks
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From jimp at HAWAII.EDU  Wed Nov 18 16:09:27 2009
From: jimp at HAWAII.EDU (James T. Potemra)
Date: Wed, 18 Nov 2009 11:09:27 -1000
Subject: colored vector
In-Reply-To: <5c658ce10911181255r7299d847sbe3246fae72a9638@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.110927.1000.>

Hossein:

The vector command will take third argument that will be color, e.g., if
you have u,v,w defined
'd u;v;w' will draw vectors defined by u,v and colored according to the
values of w.  See usage
note #2 at http://www.iges.org/grads/gadoc/gradcomdsetgxout.html

Jim


hossein lotfi wrote:
> Hi all user
> do anyone know how we can display colored vector ?
> thanks
>
>
> ------------------------------------------------------------------------
>


From klevey at CUSTOMWEATHER.COM  Wed Nov 18 16:09:31 2009
From: klevey at CUSTOMWEATHER.COM (Kevin M Levey)
Date: Wed, 18 Nov 2009 13:09:31 -0800
Subject: NETCDF descriptor file problem: gadsdf: SDF file does not
 have  any non-coordinate variables.
In-Reply-To: <77fcd6b20911181115q27581b19re748af6a5ed8912a@mail.gmail.com>
Message-ID: <WED.18.NOV.2009.130931.0800.>

Hey Arlindo

Here is a weird thing - I figured out the problem.

According to the documentation: 

SDF_varname=>grads_varname
SDF_varname is the name the data variable was given when the SDF file was originally created. For NetCDF files, this name appears in the output from ncdump. It is important that SDF_varname exactly matches the variable name in the data file. SDF_varname may contain uppercase letters and non-alpha-numeric characters.


I had my names mixed, i.e. instead of

elevation=>alt 1 99 Altitude in meters

I had

alt=>elevation 1 99 Altitude in meters

hence the message "gadsdf: SDF file does not have any non-coordinate variables." I just wish there was a list of GRADS error messages and what they mean in the documentation. It would really help.

But the kicker is that for WRF outputted files it works the other way around.

Anyway, problem solved.

Thanks!

Cheers
Kevin


On Nov 18, 2009, at 11/18/09 - 11:15 AM, Arlindo da Silva wrote:

> Kevin,
> 
>   Could you make this file available to me for testing?
> 
>       Arlindo
> 
> 
> On Wed, Nov 18, 2009 at 10:27 AM, Kevin M Levey <klevey at customweather.com> wrote:
> Hi Arlindo,
> 
> No difference (same message) without the lat/lon variables listed in the CTL file and opening up directly with sdfopen: 
> 
> ga-> sdfopen /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
> Scanning self-describing file:  /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
> gadsdf: SDF file has no discernable X coordinate.
> 
> Cheers
> Kevin
> 
> On Nov 17, 2009, at 11/17/09 - 8:49 PM, Arlindo da Silva wrote:
> 
>> 
>> 
>> On Tue, Nov 17, 2009 at 10:52 PM, Kevin M Levey <klevey at customweather.com> wrote:
>> TUE 17NOV09: 1945PST
>> 
>> I am having problems opening trying to open a netcdf file of elevation data created by GMT. I am getting an error I've never seen before and don't understand.
>> 
>> The output from ncdump -h is:
>> 
>> netcdf topo2 {
>> dimensions:
>>        lat = 101 ;
>>        lon = 151 ;
>> variables:
>>        double lat(lat) ;
>>                lat:long_name = "latitude" ;
>>                lat:units = "degrees_north" ;
>>                lat:actual_range = 36.9, 37. ;
>>        double lon(lon) ;
>>                lon:long_name = "longitude" ;
>>                lon:units = "degrees_north" ;
>>                lon:actual_range = -120.18, -120.03 ;
>>        float elevation(lat, lon) ;
>>                elevation:long_name = "elevation" ;
>>                elevation:units = "meters" ;
>>                elevation:_FillValue = -999.f ;
>>                elevation:actual_range = 57.8879890441895, 96.9689636230469 ;
>> 
>> // global attributes:
>>                :Conventions = "COARDS/CF-1.0" ;
>>                :title = "../grids/madera/mapdata/topo/topo.grd" ;
>>                :history = "grdsample -R-120.18/-120.03/36.90/37 -I0.06m ../grids/DATA/tmp/madera_topo250.grd -G../grids/madera/mapdata/topo/topo.grd" ;
>>                :GMT_version = "4.5.0 [64-bit]" ;
>> }
>> 
>> 
>> My CTL file is as follows:
>> 
>> DSET /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
>> TITLE This is a sample USL grid box for Central California
>> UNDEF -9999
>> XDEF lon 151 LINEAR -120.18 0.001
>> YDEF lat 101 LINEAR 36.9 0.001
>> VARS 3
>> alt=>elevation 1 99 Altitude in meters
>> lon=>lon 1 99 longitude
>> lat=>lat 1 99  Latitude
>> ENDVARS
>> 
>> 
>> Try eliminating lat/lon from the variable list; these are 1D coordinate variables:
>> 
>> VARS 1
>> alt=>elevation 1 99 Altitude in meters
>> ENDVARS
>> 
>> Better yet, have you tried opening this netcdf file directly with "sdfopen"?
>> 
>> ga-> sdfopen /prod/custom/Input/modelplots/GRADS/reference/topo2.grd
>> 
>>     Arlindo
>>  
>> However, here is the output I get when opening the CTL file (GRADS Version 2.0.a7.oga.2)
>> 
>> ga-> xdfopen usl_topo.ctl
>> Scanning Descriptor File:  usl_topo.ctl
>> SDF file has no discernable time coordinate -- using default values.
>> gadsdf: SDF file does not have any non-coordinate variables.
>> SDF Descriptor file usl_topo.ctl was not successfully opened & parsed.
>> 
>> Obviously I am doing something wrong here. I've had success before opening up WRF netcdf data files using this method, but if anyone has any suggestions here, I'd love to hear from you.
>> 
>> Thanks.
>> 
>> Regards,
>> 
>> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape Town)
>> Director of Meteorological Operations
>> CustomWeather, Inc.
>> San Francisco, California, USA
>> 
>> "Taking the World by Storm!"
>> 
>> http://www.customweather.com
>> http://www.myforecast.com
>> http://www.1stweather.com
>> 
>> cell: 415-794-0411
>> work: 415-777-3566
>> email: klevey at customweather.com
>> 
>> 
>> 
>> -- 
>> Arlindo da Silva
>> dasilva at alum.mit.edu
> 
> 
> 
> 
> -- 
> Arlindo da Silva
> dasilva at alum.mit.edu

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From andy at F5DATA.COM  Wed Nov 18 22:16:09 2009
From: andy at F5DATA.COM (Andrew Revering)
Date: Wed, 18 Nov 2009 21:16:09 -0600
Subject: Multiple NetCDF Combine for Radar
Message-ID: <WED.18.NOV.2009.211609.0600.>

I am loading 142 radar sites into one graphic in GrADS from NetCDF files.



I want to do a smoothed shaded contour of the data. When I do this, each
radar site is contoured using the smth9() function and it works well..



The problem I have is it looks goofy when you smooth each radar site. I need
all of the data to be plotted and then it all smoothed together.



This would be accomplished if the 142 individual data sources were in one
file, but I don't know if they can be combined because they are of different
locations.



Any thoughts?



Is it possible to load all of the individual data sources into memory and
then run smth9() as you display all of the data at once?





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From gpmenon009 at GMAIL.COM  Thu Nov 19 01:10:45 2009
From: gpmenon009 at GMAIL.COM (Gopal Menon)
Date: Thu, 19 Nov 2009 11:40:45 +0530
Subject: colored vector
In-Reply-To: <4B046287.8070104@hawaii.edu>
Message-ID: <THU.19.NOV.2009.114045.0530.>

Hossein,

There is some other way in which the vectors can be plotted colored.

d (u,v);mag(u,v)

regards
gopal

On Thu, Nov 19, 2009 at 2:39 AM, James T. Potemra <jimp at hawaii.edu> wrote:

> Hossein:
>
> The vector command will take third argument that will be color, e.g., if
> you have u,v,w defined
> 'd u;v;w' will draw vectors defined by u,v and colored according to the
> values of w.  See usage
> note #2 at http://www.iges.org/grads/gadoc/gradcomdsetgxout.html
>
> Jim
>
>
> hossein lotfi wrote:
>
>> Hi all user
>> do anyone know how we can display colored vector ?
>> thanks
>>
>>
>> ------------------------------------------------------------------------
>>
>>
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From munia_c at YAHOO.CO.IN  Thu Nov 19 01:27:55 2009
From: munia_c at YAHOO.CO.IN (tanusri chakraborty)
Date: Thu, 19 Nov 2009 11:57:55 +0530
Subject: how to open HDF file in grads
Message-ID: <THU.19.NOV.2009.115755.0530.>

I want to open HDF file in grads. But?I am faceing problem ,bcoz it is not opening with sdfopen or xdfopen commened. Plz give me some suggestion to open the HDF file in grads


      Keep up with people you care about with Yahoo! India Mail. Learn how. http://in.overview.mail.yahoo.com/connectmore
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From mmahakur at TROPMET.RES.IN  Thu Nov 19 03:02:00 2009
From: mmahakur at TROPMET.RES.IN (M.Mahakur)
Date: Thu, 19 Nov 2009 13:32:00 +0530
Subject: colored vector
In-Reply-To: <5c658ce10911181255r7299d847sbe3246fae72a9638@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.133200.0530.>

display u;v;mag(u,v)

---------- Original Message -----------
From: hossein lotfi <h.meteo.shirazu at gmail.com>
To: GRADSUSR at list.cineca.it
Sent: Wed, 18 Nov 2009 14:55:34 -0600
Subject: colored vector

> Hi all user
> do anyone know how we can display colored vector ?
> thanks
------- End of Original Message -------


From kcpattnayak at GMAIL.COM  Thu Nov 19 05:13:01 2009
From: kcpattnayak at GMAIL.COM (Kanhu Charan Pattnayak)
Date: Thu, 19 Nov 2009 15:43:01 +0530
Subject: Regrid2 error
In-Reply-To: <dcc345180911190058v5171847fu854880fa2b113986@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.154301.0530.>

Dear Grads Users
I am trying to interpolate IMD 1deg gridded data to 0.5deg in *Grads-1.8sl11
* in my AIX Unix Platform and we are having
I got the following message.

ga-> define newg=regrid2(rf,0.5)
Syntax Error:  Invalid Operand
  'regrid2' not a variable or function name
  Error ocurred at column 1
DEFINE error:  Invalid expression.


But  I don't know why this error is coming.
I have already checked that Regrid2 is there in the GrADS directory.
Please suggest me what to do.
Thanks in Advance.
--
Kanhu Charan Pattnayak (Research Scholar)
Room No.311, Block - VI
Centre for Atmospheric Sciences
IIT Delhi, Hauz Khas
New Delhi - 110 016
India



--
Kanhu Charan Pattnayak (Research Scholar)
Room No.311, Block - VI
Centre for Atmospheric Sciences
IIT Delhi, Hauz Khas
New Delhi - 110 016
India
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From gpmenon009 at GMAIL.COM  Thu Nov 19 05:35:04 2009
From: gpmenon009 at GMAIL.COM (Gopal Menon)
Date: Thu, 19 Nov 2009 16:05:04 +0530
Subject: Regrid2 error
In-Reply-To: <dcc345180911190213o56acb578gf0770085cda39f23@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.160504.0530.>

Kanhu,

Install grads-1.9b4. Your problem will get solved.



On Thu, Nov 19, 2009 at 3:43 PM, Kanhu Charan Pattnayak <
kcpattnayak at gmail.com> wrote:

>
> Dear Grads Users
> I am trying to interpolate IMD 1deg gridded data to 0.5deg in *
> Grads-1.8sl11* in my AIX Unix Platform and we are having
> I got the following message.
>
> ga-> define newg=regrid2(rf,0.5)
> Syntax Error:  Invalid Operand
>   'regrid2' not a variable or function name
>   Error ocurred at column 1
> DEFINE error:  Invalid expression.
>
>
> But  I don't know why this error is coming.
> I have already checked that Regrid2 is there in the GrADS directory.
> Please suggest me what to do.
> Thanks in Advance.
> --
> Kanhu Charan Pattnayak (Research Scholar)
> Room No.311, Block - VI
> Centre for Atmospheric Sciences
> IIT Delhi, Hauz Khas
> New Delhi - 110 016
> India
>
>
>
> --
> Kanhu Charan Pattnayak (Research Scholar)
> Room No.311, Block - VI
> Centre for Atmospheric Sciences
> IIT Delhi, Hauz Khas
> New Delhi - 110 016
> India
>
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From sushantpuranik at GMAIL.COM  Thu Nov 19 05:55:13 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Thu, 19 Nov 2009 16:25:13 +0530
Subject: colored vector
In-Reply-To: <20091119080133.M51600@tropmet.res.in>
Message-ID: <THU.19.NOV.2009.162513.0530.>

I am using followind script for making such plots

'set gxout vector'
'set arrscl 1 30'
'set cthick 4'
'set arrowhead 0.10'
'set clevs 3 5 10 15 20 25'
'set ccols 0 4 1 2 3 5 12'
'd skip(uwnd,2,2);skip(vwnd.2,2,2);skip(sqrt(uwnd*uwnd+vwnd.2*vwnd.2),2,2)'
'run /home/Sushant/Desktop/lib/cbar.gs'
'set line 1 1 1'
'print'
'disable print'
'!/usr/local/bin/gxpng -x 1000 -r -i temp -o /home/Sushant/Desktop/wind.png'



On Thu, Nov 19, 2009 at 1:32 PM, M.Mahakur <mmahakur at tropmet.res.in> wrote:

> display u;v;mag(u,v)
>
> ---------- Original Message -----------
> From: hossein lotfi <h.meteo.shirazu at gmail.com>
> To: GRADSUSR at list.cineca.it
> Sent: Wed, 18 Nov 2009 14:55:34 -0600
> Subject: colored vector
>
> > Hi all user
> > do anyone know how we can display colored vector ?
> > thanks
> ------- End of Original Message -------
>



--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From kcpattnayak at GMAIL.COM  Thu Nov 19 06:33:54 2009
From: kcpattnayak at GMAIL.COM (Kanhu Charan Pattnayak)
Date: Thu, 19 Nov 2009 17:03:54 +0530
Subject: Regrid2 error
In-Reply-To: <abe9a17e0911190235v160f32fbkc7a73fe1d4efa0b4@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.170354.0530.>

Thank you Mr Gopal
But Grads-1.9b4 is not compatible with IBM AIX machine.


On Thu, Nov 19, 2009 at 4:05 PM, Gopal Menon <gpmenon009 at gmail.com> wrote:

>
> Kanhu,
>
> Install grads-1.9b4. Your problem will get solved.
>
>
>
>
> On Thu, Nov 19, 2009 at 3:43 PM, Kanhu Charan Pattnayak <
> kcpattnayak at gmail.com> wrote:
>
>>
>> Dear Grads Users
>> I am trying to interpolate IMD 1deg gridded data to 0.5deg in *
>> Grads-1.8sl11* in my AIX Unix Platform and we are having
>> I got the following message.
>>
>> ga-> define newg=regrid2(rf,0.5)
>> Syntax Error:  Invalid Operand
>>   'regrid2' not a variable or function name
>>   Error ocurred at column 1
>> DEFINE error:  Invalid expression.
>>
>>
>> But  I don't know why this error is coming.
>> I have already checked that Regrid2 is there in the GrADS directory.
>> Please suggest me what to do.
>> Thanks in Advance.
>> --
>> Kanhu Charan Pattnayak (Research Scholar)
>> Room No.311, Block - VI
>> Centre for Atmospheric Sciences
>> IIT Delhi, Hauz Khas
>> New Delhi - 110 016
>> India
>>
>>
>>
>> --
>> Kanhu Charan Pattnayak (Research Scholar)
>> Room No.311, Block - VI
>> Centre for Atmospheric Sciences
>> IIT Delhi, Hauz Khas
>> New Delhi - 110 016
>> India
>>
>
>


--
Kanhu Charan Pattnayak (Research Scholar)
Room No.311, Block - VI
Centre for Atmospheric Sciences
IIT Delhi, Hauz Khas
New Delhi - 110 016
India
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From gpmenon009 at GMAIL.COM  Thu Nov 19 06:41:09 2009
From: gpmenon009 at GMAIL.COM (Gopal Menon)
Date: Thu, 19 Nov 2009 17:11:09 +0530
Subject: Regrid2 error
In-Reply-To: <dcc345180911190333i2a7f96cbw556a7956a4003958@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.171109.0530.>

Install open grads.

  http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle

The function is inbuilt in opengrads.

define newg=re(rf,0.5) will do regridding for you




On Thu, Nov 19, 2009 at 5:03 PM, Kanhu Charan Pattnayak <
kcpattnayak at gmail.com> wrote:

> Thank you Mr Gopal
> But Grads-1.9b4 is not compatible with IBM AIX machine.
>
>
> On Thu, Nov 19, 2009 at 4:05 PM, Gopal Menon <gpmenon009 at gmail.com> wrote:
>
>>
>> Kanhu,
>>
>> Install grads-1.9b4. Your problem will get solved.
>>
>>
>>
>>
>> On Thu, Nov 19, 2009 at 3:43 PM, Kanhu Charan Pattnayak <
>> kcpattnayak at gmail.com> wrote:
>>
>>>
>>> Dear Grads Users
>>> I am trying to interpolate IMD 1deg gridded data to 0.5deg in *
>>> Grads-1.8sl11* in my AIX Unix Platform and we are having
>>> I got the following message.
>>>
>>> ga-> define newg=regrid2(rf,0.5)
>>> Syntax Error:  Invalid Operand
>>>   'regrid2' not a variable or function name
>>>   Error ocurred at column 1
>>> DEFINE error:  Invalid expression.
>>>
>>>
>>> But  I don't know why this error is coming.
>>> I have already checked that Regrid2 is there in the GrADS directory.
>>> Please suggest me what to do.
>>> Thanks in Advance.
>>> --
>>> Kanhu Charan Pattnayak (Research Scholar)
>>> Room No.311, Block - VI
>>> Centre for Atmospheric Sciences
>>> IIT Delhi, Hauz Khas
>>> New Delhi - 110 016
>>> India
>>>
>>>
>>>
>>> --
>>> Kanhu Charan Pattnayak (Research Scholar)
>>> Room No.311, Block - VI
>>> Centre for Atmospheric Sciences
>>> IIT Delhi, Hauz Khas
>>> New Delhi - 110 016
>>> India
>>>
>>
>>
>
>
> --
> Kanhu Charan Pattnayak (Research Scholar)
> Room No.311, Block - VI
> Centre for Atmospheric Sciences
> IIT Delhi, Hauz Khas
> New Delhi - 110 016
> India
>
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From h.meteo.shirazu at GMAIL.COM  Thu Nov 19 07:47:13 2009
From: h.meteo.shirazu at GMAIL.COM (hossein lotfi)
Date: Thu, 19 Nov 2009 06:47:13 -0600
Subject: colored vector
In-Reply-To: <72e8bd3d0911190255k330b558br57c0e9a351703350@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.064713.0600.>

On Thu, Nov 19, 2009 at 4:55 AM, sushant puranik
<sushantpuranik at gmail.com>wrote:

> I am using followind script for making such plots
>
> 'set gxout vector'
> 'set arrscl 1 30'
> 'set cthick 4'
> 'set arrowhead 0.10'
> 'set clevs 3 5 10 15 20 25'
> 'set ccols 0 4 1 2 3 5 12'
> 'd skip(uwnd,2,2);skip(vwnd.2,2,2);skip(sqrt(uwnd*uwnd+vwnd.2*vwnd.2),2,2)'
> 'run /home/Sushant/Desktop/lib/cbar.gs'
> 'set line 1 1 1'
> 'print'
> 'disable print'
> '!/usr/local/bin/gxpng -x 1000 -r -i temp -o
> /home/Sushant/Desktop/wind.png'
>
>
>
>
> On Thu, Nov 19, 2009 at 1:32 PM, M.Mahakur <mmahakur at tropmet.res.in>wrote:
>
>> display u;v;mag(u,v)
>>
>> ---------- Original Message -----------
>> From: hossein lotfi <h.meteo.shirazu at gmail.com>
>> To: GRADSUSR at list.cineca.it
>> Sent: Wed, 18 Nov 2009 14:55:34 -0600
>> Subject: colored vector
>>
>> > Hi all user
>> > do anyone know how we can display colored vector ?
>> > thanks
>> ------- End of Original Message -------
>>
>
>
>
> --
> Sushant Puranik
> Junior Research Fellow
> Dept. of Atmospheric & Space Sciences,
> University of Pune,
> Pune-07,
> India.
>

Hi
thank you very very much
it's worked
good luck
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From zjuyanlibin at 163.COM  Thu Nov 19 09:32:00 2009
From: zjuyanlibin at 163.COM (Yan Libin)
Date: Thu, 19 Nov 2009 22:32:00 +0800
Subject: difference between d u;v and d u;v;w
Message-ID: <THU.19.NOV.2009.223200.0800.>

Hi, everyone!

Can anyone tell me the difference between d u;v and d u;v;w?

BTW, When I plotted the global U-V wind field, the U-V values of some places were so large that
the others with small U-V values were invisible. Is there any method which can overcome this problem?

Any suggestion is welcome!

Thanks in advance!

Best regards,

Libin Yan


2009-11-19



Yan Libin
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From arlindo.dasilva at GMAIL.COM  Thu Nov 19 09:42:17 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Thu, 19 Nov 2009 09:42:17 -0500
Subject: Multiple NetCDF Combine for Radar
In-Reply-To: <200911190316.nAJ3GBLs099692@mail.authsmtp.com>
Message-ID: <THU.19.NOV.2009.094217.0500.>

On Wed, Nov 18, 2009 at 10:16 PM, Andrew Revering <andy at f5data.com> wrote:

>  I am loading 142 radar sites into one graphic in GrADS from NetCDF files.
>
>
>
> I want to do a smoothed shaded contour of the data. When I do this, each
> radar site is contoured using the smth9() function and it works well..
>
>
>
> The problem I have is it looks goofy when you smooth each radar site. I
> need all of the data to be plotted and then it all smoothed together.
>
>
>
> This would be accomplished if the 142 individual data sources were in one
> file, but I don?t know if they can be combined because they are of different
> locations.
>
>
>
> Any thoughts?
>
>
>
> Is it possible to load all of the individual data sources into memory and
> then run smth9() as you display all of the data at once?
>
>
>

You could use re() to put each variable on a global grid (or large enough to
span your region of interest). Once you have all in the same grid you should
be able to combine them and display the resulting variable.  You will
probably be using maskout() and const() in the process of combining these.
Is this detailed enough?

   Arlindo

-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From cmunozc at UDEC.CL  Thu Nov 19 09:59:58 2009
From: cmunozc at UDEC.CL (Cristian Gonzal =?iso-8859-1?Q?Mu=F1oz_Castillo?=)
Date: Thu, 19 Nov 2009 11:59:58 -0300
Subject: difference between d u;v and d u;v;w
In-Reply-To: <200911192231597884323@163.com>
Message-ID: <THU.19.NOV.2009.115958.0300.>

By normalization, for example divide the values between the number of
stations/grid points. You can also use percentiles, etc. There are many
ways to normalize!

Regards!

> Hi, everyone!
>
> Can anyone tell me the difference between d u;v and d u;v;w?
>
> BTW, When I plotted the global U-V wind field, the U-V values of some
> places were so large that
> the others with small U-V values were invisible. Is there any method which
> can overcome this problem?
>
> Any suggestion is welcome!
>
> Thanks in advance!
>
> Best regards,
>
> Libin Yan
>
>
> 2009-11-19
>
>
>
> Yan Libin
>


--
Cristian G. Mu?oz Castillo
Geof?sico
Licenciado en Ciencias F?sicas
Oficina 442
Depto. Geof?sica (DGEO)
Fono (41) 2203155
Facultad Ciencias F?sicas y Matem?ticas
Universidad de Concepci?n
Concepci?n
Chile


From daniel.maineult at NEUF.FR  Thu Nov 19 11:33:49 2009
From: daniel.maineult at NEUF.FR (Daniel MAINEULT)
Date: Thu, 19 Nov 2009 17:33:49 +0100
Subject: printim bugs
Message-ID: <THU.19.NOV.2009.173349.0100.>

Hello to all,

I solved my problem with printim -b option
I discovered two bugs :

1 - If the name of file background starts with a capital letter -> background image open error !!!

IE : world.png it is ok? ---- World.png background image open error !!!

2 - If background image to a superior size 800*640 no transparency fonction.
????? my image make 960*576, if I reduce to 800*640 that is ok.

Daniel





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From hhe at ATMOS.UMD.EDU  Thu Nov 19 12:00:00 2009
From: hhe at ATMOS.UMD.EDU (Hao He)
Date: Thu, 19 Nov 2009 12:00:00 -0500
Subject: how to open HDF file in grads
In-Reply-To: <538732.56343.qm@web8320.mail.in.yahoo.com>
Message-ID: <THU.19.NOV.2009.120000.0500.>

You can write .ctl file and use open command.

Hao


On Thu, 19 Nov 2009, tanusri chakraborty wrote:

> I want to open HDF file in grads. But?I am faceing problem ,bcoz it is not opening with sdfopen or xdfopen commened. Plz give me some suggestion to open the HDF file in grads


       Keep up with people you care about with Yahoo! India Mail. Learn how. http://in.overview.mail.yahoo.com/connectmore

From Michael.Fiorino at NOAA.GOV  Thu Nov 19 13:57:03 2009
From: Michael.Fiorino at NOAA.GOV (Michael Fiorino)
Date: Thu, 19 Nov 2009 18:57:03 +0000
Subject: Regrid2 error
In-Reply-To: <abe9a17e0911190341u296ebc47h28723a709b933b82@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.185703.0000.>

and re2 the extension version of my regrid2...with bug fixes...it's best
to use either re or re2  /r mike

Gopal Menon wrote:
> Install open grads.
>
>
> http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle
>
> The function is inbuilt in opengrads.
>
> define newg=re(rf,0.5) will do regridding for you
>
>
>
>
> On Thu, Nov 19, 2009 at 5:03 PM, Kanhu Charan Pattnayak
> <kcpattnayak at gmail.com <mailto:kcpattnayak at gmail.com>> wrote:
>
>     Thank you Mr Gopal
>     But Grads-1.9b4 is not compatible with IBM AIX machine.
>
>
>     On Thu, Nov 19, 2009 at 4:05 PM, Gopal Menon <gpmenon009 at gmail.com
>     <mailto:gpmenon009 at gmail.com>> wrote:
>
>
>         Kanhu,
>
>         Install grads-1.9b4. Your problem will get solved.
>
>
>
>
>         On Thu, Nov 19, 2009 at 3:43 PM, Kanhu Charan Pattnayak
>         <kcpattnayak at gmail.com <mailto:kcpattnayak at gmail.com>> wrote:
>
>
>             Dear Grads Users
>             I am trying to interpolate IMD 1deg gridded data to 0.5deg
>             in *Grads-1.8sl11* in my AIX Unix Platform and we are having
>             I got the following message.
>
>             ga-> define newg=regrid2(rf,0.5)
>             Syntax Error:  Invalid Operand
>               'regrid2' not a variable or function name
>               Error ocurred at column 1
>             DEFINE error:  Invalid expression.
>
>
>             But  I don't know why this error is coming.
>             I have already checked that Regrid2 is there in the GrADS
>             directory.
>             Please suggest me what to do.
>             Thanks in Advance.
>             --
>             Kanhu Charan Pattnayak (Research Scholar)
>             Room No.311, Block - VI
>             Centre for Atmospheric Sciences
>             IIT Delhi, Hauz Khas
>             New Delhi - 110 016
>             India
>
>
>
>             --
>             Kanhu Charan Pattnayak (Research Scholar)
>             Room No.311, Block - VI
>             Centre for Atmospheric Sciences
>             IIT Delhi, Hauz Khas
>             New Delhi - 110 016
>             India
>
>
>
>
>
>     --
>     Kanhu Charan Pattnayak (Research Scholar)
>     Room No.311, Block - VI
>     Centre for Atmospheric Sciences
>     IIT Delhi, Hauz Khas
>     New Delhi - 110 016
>     India
>
>


From Michael.Fiorino at NOAA.GOV  Thu Nov 19 13:59:41 2009
From: Michael.Fiorino at NOAA.GOV (Michael Fiorino)
Date: Thu, 19 Nov 2009 18:59:41 +0000
Subject: printim bugs
In-Reply-To: <31249151.562961258648429717.JavaMail.www@wsfrf1122>
Message-ID: <THU.19.NOV.2009.185941.0000.>

daniel, you need to tell is the exact version of grads... i know earlier
versions of grads2 from cola has this bug (i stepped on it) but from
opengrads does not... see http://opengrads.org/  either version 1.10 or
2.0 should work, plus you get extensions...  cheers, mike

Daniel MAINEULT wrote:
> Hello to all,
>
> I solved my problem with printim -b option
> I discovered two bugs :
>
> 1 - If the name of file background starts with a capital letter ->
> background image open error !!!
>
> IE : world.png it is ok  ---- World.png background image open error !!!
>
> 2 - If background image to a superior size 800*640 no transparency
> fonction.
>       my image make 960*576, if I reduce to 800*640 that is ok.
>
> Daniel
>
>
>
>


From daniel.maineult at NEUF.FR  Thu Nov 19 17:15:42 2009
From: daniel.maineult at NEUF.FR (Daniel MAINEULT)
Date: Thu, 19 Nov 2009 23:15:42 +0100
Subject: re-printim
Message-ID: <THU.19.NOV.2009.231542.0100.>

Dear Mike,

me work under linux Fedora 11? 
I have the problem with the two following versions:

grads 2.0.a7 and opengrads 2.0.a5.oga.5

Impossible to use a resolution 720*576 or 960*576 the transparency doesn't function
but with 800*640 it is ok.? 
I need to use formats broadcasts.

Daniel



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From dasilva at ALUM.MIT.EDU  Thu Nov 19 17:49:35 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Thu, 19 Nov 2009 17:49:35 -0500
Subject: User Defined Functions in OpenGrADS
In-Reply-To: <8d9ec3dd0911191405h32cada70m847fe303f7ea3795@mail.gmail.com>
Message-ID: <THU.19.NOV.2009.174935.0500.>

---------- Forwarded message ----------
> From: Paidemwoyo Munhutu <Paidemwoyo.Munhutu at noaa.gov>
> Date: Thu, Nov 19, 2009 at 4:49 PM
> Subject: RE: User Defined Functions in OpenGrADS
> To: ddasilva at umd.edu
>
>
> Hello,
>
> I am a software engineer at GFDL with NOAA and I would like to know if the
> user defined functions are still disabled in OpenGrADS
>

The old style UDFs are no longer supported. The OpenGrADS project supports
the dynamically linked extesions.


> . I built opengrads (GrADS_v2.0.a5) from source so I was not sure if I had
> made a mistake. I then downloaded the latest version GrADS 2.0.a7.oga.3. In
> both I ran the command query udft and it returned a warning message saying
> the feature was disabled. Is there anyway to enable it?
>
> The particular function I want to use is regrid2, but it is unrecognised
> because of this.
>
>
Try

ga-> q udf
ga-> q udc

or even

ga-> q udxt

 "q udft" is the old command, and the message you saw comes from the COLA's
part of the code. I agree, it is confusing.

    Arlindo

--
Arlindo da Silva
dasilva at alum.mit.edu
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From Michael.Fiorino at NOAA.GOV  Thu Nov 19 19:12:49 2009
From: Michael.Fiorino at NOAA.GOV (Michael Fiorino)
Date: Fri, 20 Nov 2009 00:12:49 +0000
Subject: User Defined Functions in OpenGrADS
In-Reply-To: <77fcd6b20911191449t2ae4203em3ba29ba9e4f71d9f@mail.gmail.com>
Message-ID: <FRI.20.NOV.2009.001249.0000.>

regrid2 as an old style udf that works in grads <= 1.9 but not in our
opengrads versions as arlindo described; and the regrid2.f fortran code
i wrote has bugs (not big ones though) that have been eliminated in the
opengrads extension 're2'.

please do NOT use regrid2, but use the corrected version in re2 that
works in both opengrads 1.10 and 2.0.  also note re2 is functionally the
same as regrid2 and if you replaced all calls to regrid2 with re2 you
get the same behavior, but not the same answers in some cases...

let me know if you have problems using re2.

/r mike

Arlindo da Silva wrote:
>
>
>     ---------- Forwarded message ----------
>     From: *Paidemwoyo Munhutu* <Paidemwoyo.Munhutu at noaa.gov
>     <mailto:Paidemwoyo.Munhutu at noaa.gov>>
>     Date: Thu, Nov 19, 2009 at 4:49 PM
>     Subject: RE: User Defined Functions in OpenGrADS
>     To: ddasilva at umd.edu <mailto:ddasilva at umd.edu>
>
>
>     Hello,
>
>     I am a software engineer at GFDL with NOAA and I would like to
>     know if the user defined functions are still disabled in OpenGrADS
>
>
> The old style UDFs are no longer supported. The OpenGrADS project
> supports the dynamically linked extesions.
>
>
>     . I built opengrads (GrADS_v2.0.a5) from source so I was not sure
>     if I had made a mistake. I then downloaded the latest version
>     GrADS 2.0.a7.oga.3. In both I ran the command query udft and it
>     returned a warning message saying the feature was disabled. Is
>     there anyway to enable it?
>
>     The particular function I want to use is regrid2, but it is
>     unrecognised because of this.
>
>
> Try
>
> ga-> q udf
> ga-> q udc
>
> or even
>
> ga-> q udxt
>
>  "q udft" is the old command, and the message you saw comes from the
> COLA's part of the code. I agree, it is confusing.
>
>     Arlindo
>
> --
> Arlindo da Silva
> dasilva at alum.mit.edu <mailto:dasilva at alum.mit.edu>


From qilixin at GMAIL.COM  Thu Nov 19 20:19:03 2009
From: qilixin at GMAIL.COM (L. Qi)
Date: Fri, 20 Nov 2009 12:19:03 +1100
Subject: difference between d u;v and d u;v;w
In-Reply-To: <200911192231597884323@163.com>
Message-ID: <FRI.20.NOV.2009.121903.1100.>

When using "d u;v;w", the wind vector colors will change  with the
magnitude of w; similarly, you can try "d u;v;mag(u,v)", in which the
wind vector colors will change with the magnitude of wind velocity.
There were discussions on this topic recently in this mail list
(Subject: colored vector).

For your second question, probably you can try to plot velocity
contours at the same time, that is:
 d u;v
 d mag(u, v)

Good luck.

Regards,
Lixin


On Fri, Nov 20, 2009 at 1:32 AM, Yan Libin <zjuyanlibin at 163.com> wrote:
> Hi, everyone!
>
> Can anyone tell me the difference between d u;v and d u;v;w?
>
> BTW, When I plotted the global U-V wind field, the U-V values of some places
> were so large that
> the others with small U-V values were invisible. Is there any method which
> can overcome this problem?
>
> Any suggestion is welcome!
>
> Thanks in advance!
>
> Best regards,
>
> Libin Yan
>
>
> 2009-11-19
> ________________________________
> Yan Libin


From arlindo.dasilva at GMAIL.COM  Thu Nov 19 22:07:33 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Thu, 19 Nov 2009 22:07:33 -0500
Subject: Multiple NetCDF Combine for Radar
In-Reply-To: <200911190316.nAJ3GBLs099692@mail.authsmtp.com>
Message-ID: <THU.19.NOV.2009.220733.0500.>

On Wed, Nov 18, 2009 at 10:16 PM, Andrew Revering <andy at f5data.com> wrote:

>  I am loading 142 radar sites into one graphic in GrADS from NetCDF files.
>
>
>
> I want to do a smoothed shaded contour of the data. When I do this, each
> radar site is contoured using the smth9() function and it works well..
>
>
>
I've been looking at your data. Why would you want to use smoothed
contouring to display your data? This is supposed to represent
precipitation, a notoriously discontinuous parameter.

The problem I have is it looks goofy when you smooth each radar site. I need
> all of the data to be plotted and then it all smoothed together.
>
> These smoothing algorithms assume the function have a certain number of
continuous derivatives. They are not designed for discontinuous data.
Results are unlikely to be physical.


> This would be accomplished if the 142 individual data sources were in one
> file, but I don?t know if they can be combined because they are of different
> locations.
>
>  Regardless, it is fair to want to combine these individual radar reports
into a single grid. Now, the data resolution is dlon ~ dlat ~ 0.013599
degrees, way too fine for visualization at a continental scale.  You should
be able to get away with dlon = dlat ~ 0.1 deg. I used 0.05 deg in the
attached plot.

The data you sent me in a separate e-mail had individual files in a
subdirectory out/, e. g.,

  out/
    n.kabr.nc
    sn.kabx.nc
    sn.kakq.nc
    sn.kama.nc
    sn.kamx.nc
    sn.kapx.nc
    ...

The attached radar_composite.gs script goes over these individual files, use
re() to place them on a common grid, and combine them, taking care for not
double count pixels. This script requires the function if() and command
gxyat, both available with the opengrads extensions; you should be able to
replace these with maskout and printim. Command sdfwrite is used to save the
composite grid.

  Could you go over the script and make sure it is correct? We should
include this in a recipe.

    Arlindo










-- 
Arlindo da Silva
dasilva at alum.mit.edu
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From arlindo.dasilva at GMAIL.COM  Thu Nov 19 23:15:09 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Thu, 19 Nov 2009 23:15:09 -0500
Subject: re-printim
In-Reply-To: <31004231.355491258668942726.JavaMail.www@wsfrf1129>
Message-ID: <THU.19.NOV.2009.231509.0500.>

On Thu, Nov 19, 2009 at 5:15 PM, Daniel MAINEULT <daniel.maineult at neuf.fr>wrote:

> Dear Mike,
>
> me work under linux Fedora 11
> I have the problem with the two following versions:
>
> grads 2.0.a7 and opengrads 2.0.a5.oga.5
>
> Impossible to use a resolution 720*576 or 960*576 the transparency doesn't
> function
> but with 800*640 it is ok.
> I need to use formats broadcasts.
>
>
The command version of* gxyat* has a more flexible transparency capability
which allows each color you define to have its own transparency level (the
so-called alpha channel).  In particular, it can emulate the -t option of
printim and it does work with any resolution. Here is an example:

ga-> open model
ga-> set_rgba 60 125 125 125 0 1
ga-> set ccols 1 2 3 4 5 6 60          t.
ga-> set clevs 500 600 700 800 900 1000
ga-> d ps
ga-> gxyat -x 1600 -y 1200 img.png

As a bonus, you get anti-aliased fonts.  Here is the syntax of the
set_rgbacommand that Pablo Romero contributed:

NAME
     set_rgba - define color including alpha channel

SYNOPSIS
     set_rgba color red green blue alpha [mask]

DESCRIPTION
     This User Defined Command (UDC) defines *color* given its
     RGB triplet along with its *alpha* channel.

     color   integer in the range [16-255]
     red,
     green,
     blue    integers in the range [0-255]
     alpha   float, with alpha ranging from 0.0 (fully transparent)
             to 1.0 (fully opaque).

    The optional parameter *mask* determines whether the color below
    it is visible or not.

    mask=0  --- if alpha<1, *color* will be semi-transparent and the
                colors below it will be visible (default)
    mask=1  --- if alpha<1, *color* will be semi-transparent but the
                colors below it will *not* be visible

EXAMPLE
    In order to emulate the -t option in printim

       ga-> set rgb 60 125 125 125
       ga-> printim img.png -t 60

       Specify alpha=0 and mask=1

       ga-> set_rgba 60 125 125 125 0 1
       ga-> gxyat img.png

--
Arlindo da Silva
dasilva at alum.mit.edu
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From zjuyanlibin at 163.COM  Fri Nov 20 03:01:29 2009
From: zjuyanlibin at 163.COM (=?utf-8?B?WWFuIExpYmlu?=)
Date: Fri, 20 Nov 2009 16:01:29 +0800
Subject: =?utf-8?B?UmU6IFJlOiBkaWZmZXJlbmNlIGJldHdlZW4gZCB1O3YgYW5kIGQgdTt2O3c=?=
Message-ID: <FRI.20.NOV.2009.160129.0800.>

Thank you all for your reply and suggestions.

I wanna know how to set the ccolor to 1 while mag(u,v)<10?

Thanks in advance.

Best Regards,


2009-11-20 



Yan Libin 



???? L. Qi 
????? 2009-11-20  15:48:06 
???? GRADSUSR 
??? 
??? Re: difference between d u;v and d u;v;w 
 
When using "d u;v;w", the wind vector colors will change  with the
magnitude of w; similarly, you can try "d u;v;mag(u,v)", in which the
wind vector colors will change with the magnitude of wind velocity.
There were discussions on this topic recently in this mail list
(Subject: colored vector).
For your second question, probably you can try to plot velocity
contours at the same time, that is:
 d u;v
 d mag(u, v)
Good luck.
Regards,
Lixin
On Fri, Nov 20, 2009 at 1:32 AM, Yan Libin <zjuyanlibin at 163.com> wrote:
> Hi, everyone!
>
> Can anyone tell me the difference between d u;v and d u;v;w?
>
> BTW, When I plotted the global U-V wind field, the U-V values of some places
> were so large that
> the others with small U-V values were invisible. Is there any method which
> can overcome this problem?
>
> Any suggestion is welcome!
>
> Thanks in advance!
>
> Best regards,
>
> Libin Yan
>
>
> 2009-11-19
> ________________________________
> Yan Libin
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From mmahakur at TROPMET.RES.IN  Fri Nov 20 05:20:00 2009
From: mmahakur at TROPMET.RES.IN (M.Mahakur)
Date: Fri, 20 Nov 2009 15:50:00 +0530
Subject: difference between d u;v and d u;v;w
In-Reply-To: <200911201601289689752@163.com>
Message-ID: <FRI.20.NOV.2009.155000.0530.>

Hi,


> Thank you all for your reply and suggestions.
>
> I wanna know how to set the ccolor to 1 while mag(u,v)<10?

Use clevs and ccols (see the grads doc for color code 0-15 and RGB settings. you can try
something as:

'set clevs 10 15 ....'
'set ccols 1 5 ....'

color (ccols) 0 and 1 as white (RGB: 0 0 0) and black (RGB: 255 255 255)..


>
> Thanks in advance.
>
> Best Regards,
>
> 2009-11-20
>
> Yan Libin
>
> [UTF-8?]???????????? L. Qi
> [UTF-8?]??????????????? 2009-11-20  15:48:06
> [UTF-8?]???????????? GRADSUSR
> [UTF-8?]? ???????
> [UTF-8?]????????? Re: difference between d u;v and d u;v;w
>
> When using "d u;v;w", the wind vector colors will change  with the
> magnitude of w; similarly, you can try "d u;v;mag(u,v)", in which the
> wind vector colors will change with the magnitude of wind velocity.
> There were discussions on this topic recently in this mail list
> (Subject: colored vector).
> For your second question, probably you can try to plot velocity
> contours at the same time, that is:
>  d u;v
>  d mag(u, v)
> Good luck.
> Regards,
> Lixin
> On Fri, Nov 20, 2009 at 1:32 AM, Yan Libin <zjuyanlibin at 163.com> wrote:
> > Hi, everyone!
> >
> > Can anyone tell me the difference between d u;v and d u;v;w?
> >
> > BTW, When I plotted the global U-V wind field, the U-V values of some places
> > were so large that
> > the others with small U-V values were invisible. Is there any method which
> > can overcome this problem?
> >
> > Any suggestion is welcome!
> >
> > Thanks in advance!
> >
> > Best regards,
> >
> > Libin Yan
> >
> >
> > 2009-11-19
> > ________________________________
> > Yan Libin
------- End of Original Message -------


From claudiomet at GMAIL.COM  Fri Nov 20 10:58:32 2009
From: claudiomet at GMAIL.COM (claudio cortes)
Date: Fri, 20 Nov 2009 12:58:32 -0300
Subject: cloud cover historical data
In-Reply-To: <5c658ce10911061325n75b074c9l569c8327461b6f26@mail.gmail.com>
Message-ID: <FRI.20.NOV.2009.125832.0300.>

Thanks for the help and links !

I found a datesets too in:

<http://nomad3.ncep.noaa.gov/pub/reanalysis-1/6hr/grb2d/>surface variables
(glabal coverage)
http://nomad3.ncep.noaa.gov/pub/reanalysis-1/6hr/grb2d/
upper air variables (global coverage)
http://nomad3.ncep.noaa.gov/pub/reanalysis-2/6hr/pgb/


2009/11/6 hossein lotfi <h.meteo.shirazu at gmail.com>

>
>
> On Fri, Nov 6, 2009 at 11:53 AM, Mike Bosilovich <
> mike.bosilovich at gmail.com> wrote:
>
>> Hi Claudio,
>>
>> Just a word of caution. Any reanalysis data is not actually
>> observations, and each reanalysis has it's own bias and uncertainty,
>> NCEP or otherwise. One reanalysis is not necessarily representative of
>> reality, especially in the physics output. Clouds and precipitation
>> can be much more related to the model part of the data assimilation
>> system. Temperature and heights less so, until you move toward data
>> sparse regions.
>>
>> That said MERRA produces reanalysis cloud fields (1/2 degree
>> resolution, global). The following links can be opened in gradsdap or
>> opengrads sessions (sdfopen) to get the MERRA cloud fields:
>>
>> 1 hourly frequency: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MAT1NXRAD<http://goldsmr2.sci.gsfc.nasa.gov/dods/MAT1NXRAD>
>> Monthly: http://goldsmr2.sci.gsfc.nasa.gov:80/dods/MATMNXRAD<http://goldsmr2.sci.gsfc.nasa.gov/dods/MATMNXRAD>
>>
>> The main data page is at:
>> http://disc.sci.gsfc.nasa.gov/daac-bin/DataHoldings.pl with a variety
>> of download options.
>>
>> Also, you may be interested in installing opengrads on your computer.
>> It has command lines built in for "merra" and "nomads", and these open
>> gui interfaces to each reanalyses Grads Data Servers.
>>
>> Good Luck and have a great weekend!!
>>
>> Mike
>>
>> On Fri, Nov 6, 2009 at 11:59 AM, claudio cortes <claudiomet at gmail.com>
>> wrote:
>> > greetings
>> >
>> > when I need historical data for climatological studies, I download
>> > datasetes from this ftp:
>> > ftp://ftp.cdc.noaa.gov/pub/Datasets/ncep.reanalysis/pressure/
>> > where can I find historical values of temperature, geotential heights,
>> > humidity and wind
>> > and this information I can extract it using grads
>> >
>> > but at this moment, I need cloud cover historial data and
>> > where can I find cloud cover historical datasets ?
>> >
>> > thaks !
>> >
>> > --
>> > Claudio Cortes
>> > +56 (2) 2994121
>> >
>> > Meteorologo
>> > Laboratorio de Meteorologia y Calidad de Aire
>> > Centro Nacional del Medio Ambiente (CENMA)
>> >
>> --------------------------------------------------------------------------------------
>> >
>> > Claudio Cortes
>> > +56 (2) 2994121
>> >
>> > Meteorologist
>> > Meteorology and Air Quality Labs
>> > National Enviroment Center, Chile (CENMA)
>> >
>>
> Hi
> Thank you very very  much for your email and links
> it's has very good data
> Thank you [?]   [?]   [?]  [?]  [?]  [?]  [?]
>



--
Claudio Cortes
+56 (2) 2994121

Meteorologo
Laboratorio de Meteorologia y Calidad de Aire
Centro Nacional del Medio Ambiente (CENMA)
--------------------------------------------------------------------------------------

Claudio Cortes
+56 (2) 2994121

Meteorologist
Meteorology and Air Quality Labs
National Enviroment Center, Chile (CENMA)
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From jmssnyder at UCDAVIS.EDU  Fri Nov 20 13:49:11 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Fri, 20 Nov 2009 19:49:11 +0100
Subject: Aerosol concentration data
Message-ID: <FRI.20.NOV.2009.194911.0100.>

Do you know where I can get aerosol data sets that can be displayed in
GrADS?

Thanks,

Jason


From jgmsantos at GMAIL.COM  Fri Nov 20 14:14:49 2009
From: jgmsantos at GMAIL.COM (Guilherme Martins)
Date: Fri, 20 Nov 2009 17:14:49 -0200
Subject: Aerosol concentration data
In-Reply-To: <20091120185032.EBE111FE09@mx2.cineca.it>
Message-ID: <FRI.20.NOV.2009.171449.0200.>

Hi Jason!

Take a look in this webpage below:

There you can find a lot of information about aerosol.

Guilherme.

http://mirador.gsfc.nasa.gov/cgi-bin/mirador/granlist.pl?page=1&dataSet=OMAEROG&version=003&allversion=003&keyword=omaeruv&pointLocation=%28-90,-180%29,%2890,180%29&location=%28-90,-180%29,%2890,180%29&searchType=Location&event=&startTime=2009-10-01%2000:00:01&endTime=2009-10-30%2023:59:59&search=&CGISESSID=46c6ea376f7cf3b7104ca83e8cc08373&nr=28&temporalres=1%20Day%28s%29&prodpg=http://mirador.gsfc.nasa.gov/collections/OMAEROG__003.shtml&longname=OMI/Aura%20Multi-wavelength%20Aerosol%20Optical%20Depth%20and%20Single%20Scattering%20Albedo%20Daily%20L2%20Global%200.25x0.25%20deg%20Lat/Lon%20Grid&granulePresentation=ungrouped



2009/11/20 Jason Snyder <jmssnyder at ucdavis.edu>

> Do you know where I can get aerosol data sets that can be displayed in
> GrADS?
>
> Thanks,
>
> Jason
>



-- 
-----------------------------------------------------------
Jos? Guilherme Martins dos Santos
Grupo de Modelagem da Atmosfera e Interfaces - GMAI
Divis?o de Modelagem e Desenvolvimento - DMD
Centro de Previs?o de Tempo e Estudos Clim?ticos - INPE
Rodovia Presidente Dutra, km 39 - CEP 12630-000
Cachoeira Paulista, SP, Brasil
Telefone(CP): +55 12 3186 8529
Celular(SJC): +55 12 91678770 / +55 12 81528580
E-mail: guilherme.martins at cptec.inpe.br
E-mail alternativo: jgmsantos at gmail.com
Homepage: http://jgmsantos.googlepages.com/index.html
-----------------------------------------------------------
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From daniel.maineult at NEUF.FR  Fri Nov 20 14:23:54 2009
From: daniel.maineult at NEUF.FR (Daniel MAINEULT)
Date: Fri, 20 Nov 2009 20:23:54 +0100
Subject: Re-printim
Message-ID: <FRI.20.NOV.2009.202354.0100.>

Dear Arlindo,

I used function set_rgba, it is perfected I achieved with excellent picture.? 
But remains the problem to encrust the background image.? 
In the joined picture I made the encrustation with ImageMagics, I will wish to make the all with grads.? 
How to encrust with gxyat the -b option doesn't exist.

regards

Daniel

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From jmssnyder at UCDAVIS.EDU  Fri Nov 20 14:32:57 2009
From: jmssnyder at UCDAVIS.EDU (Jason Snyder)
Date: Fri, 20 Nov 2009 20:32:57 +0100
Subject: making
Message-ID: <FRI.20.NOV.2009.203257.0100.>

I have a NetCDF data set that is a composite of wind data based on certain
phases of the Madden Julian Oscillation and I was interested in looking at
the backwards trajectories of air parcels coming into Lake Tahoe in such a
scenario.  I have been trying to work with the script traj.gs, but GrADS
said that TDEF is undefined.  I was then told that I need to use a .ctl
file, but how do I convert data in NetCDF format to that that can be used
in a .ctl file which I would need to run the script traj.gs.  Someone
suggested that I use Use xconv utility, which has the website:
http://badc.nerc.ac.uk/help/software/xconv/

However, I could not figure out how to use this program to convert a
NetCDF file to a .ctl file.  Can someone show me how to use this program,
or some other ways to obtained .ctl files that I could use in running the
traj.gs script?

Thanks,

Jason


From arlindo.dasilva at GMAIL.COM  Fri Nov 20 16:10:58 2009
From: arlindo.dasilva at GMAIL.COM (Arlindo da Silva)
Date: Fri, 20 Nov 2009 16:10:58 -0500
Subject: Aerosol concentration data
In-Reply-To: <20091120185032.EBE111FE09@mx2.cineca.it>
Message-ID: <FRI.20.NOV.2009.161058.0500.>

On Fri, Nov 20, 2009 at 1:49 PM, Jason Snyder <jmssnyder at ucdavis.edu> wrote:

> Do you know where I can get aerosol data sets that can be displayed in
> GrADS?
>
>
We have near-real time aerosol gridded fields from GEOS-5 at our OPeNDAP
server:

http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim

Look at these collections:

*1: inst3_2d_hwl_Nx:* 2d Fields
info<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_2d_hwl_Nx.info>
  dds<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_2d_hwl_Nx.dds>
  das<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_2d_hwl_Nx.das>

*2: inst3_3d_aer_Nv:* 3d Fields
info<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_3d_aer_Nv.info>
  dds<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_3d_aer_Nv.dds>
  das<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/inst3_3d_aer_Nv.das>

*13: tavg3_2d_aer_Cx:* 2d Fields
info<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/tavg3_2d_aer_Cx.info>
  dds<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/tavg3_2d_aer_Cx.dds>
  das<http://opendap.nccs.nasa.gov:9090/dods/GEOS-5/yotc/0.25_deg/assim/tavg3_2d_aer_Cx.das>

These are global datasets, some at 1/2 degree, others at 1/4 degree. GEOS-5
is a global data assimilation system, but no aerosol data is being
assimilated at this time. However, the model is driven by near-real time
MODIS derived biomass emissions.

If you prefer to download subsets, click on "Download" at this URL:


http://portal.nccs.nasa.gov/cgi-lats4d/opendap.cgi?&path=/GEOS-5/yotc/0.25_deg/assim

This is a web interface to lats4d. A WMS viewer can be found here:

http://wwwdev.map.nasa.gov/cgi-bin/viewer.cgi?project=geos5-aerosol-depc&year=2009&month=11&day=19&hour=00&fhour=0&mbar=850&expand=100&width=720&height=360&vproj=latlon&maxy=90&minx=-180&maxx=180&miny=-90&transparent=FALSE&bgcolor=0x000000&service=Go&layers=DUEXTTAU&layers=countries&nav=zin&factor=2&DUEXTTAU-style=DUEXTTAU&DUEXTTAU-ct=IDL22&DUEXTTAU-min=&DUEXTTAU-max=&DUEXTTAU-delta=&DUEXTTAU-amax=

   Arlindo
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From daniel.maineult at NEUF.FR  Fri Nov 20 17:12:09 2009
From: daniel.maineult at NEUF.FR (Daniel MAINEULT)
Date: Fri, 20 Nov 2009 23:12:09 +0100
Subject: printim
Message-ID: <FRI.20.NOV.2009.231209.0100.>

Dear all,

Thank you for your help and your advices.

Daniel

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From azarzarrin at YAHOO.COM  Fri Nov 20 18:04:10 2009
From: azarzarrin at YAHOO.COM (Azar Zarrin)
Date: Fri, 20 Nov 2009 15:04:10 -0800
Subject: making
In-Reply-To: <20091120193418.91E3B20372@mx2.cineca.it>
Message-ID: <FRI.20.NOV.2009.150410.0800.>

Jason,

I don't know how to use the xconv utility. However, you can write a data descriptor file (.ctl) for your NetCDF file if you know the dimensions, variables, and
attributes of your file.

First, do a "ncdump -h foo.nc''? to see the header of your NetCDF file.
Then, look at this page which simply describes how to write a descriptor file.

http://www.iges.org/grads/gadoc/aboutgriddeddata.html#descriptor

I hope this helps.
Azar

--- On Fri, 11/20/09, Jason Snyder <jmssnyder at UCDAVIS.EDU> wrote:

From: Jason Snyder <jmssnyder at UCDAVIS.EDU>
Subject: making
To: GRADSUSR at LIST.CINECA.IT
Date: Friday, November 20, 2009, 10:32 PM

I have a NetCDF data set that is a composite of wind data based on certain
phases of the Madden Julian Oscillation and I was interested in looking at
the backwards trajectories of air parcels coming into Lake Tahoe in such a
scenario.? I have been trying to work with the script traj.gs, but GrADS
said that TDEF is undefined.? I was then told that I need to use a .ctl
file, but how do I convert data in NetCDF format to that that can be used
in a .ctl file which I would need to run the script traj.gs.? Someone
suggested that I use Use xconv utility, which has the website:
http://badc.nerc.ac.uk/help/software/xconv/

However, I could not figure out how to use this program to convert a
NetCDF file to a .ctl file.? Can someone show me how to use this program,
or some other ways to obtained .ctl files that I could use in running the
traj.gs script?

Thanks,

Jason



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From dasilva at ALUM.MIT.EDU  Sat Nov 21 19:42:10 2009
From: dasilva at ALUM.MIT.EDU (Arlindo da Silva)
Date: Sat, 21 Nov 2009 19:42:10 -0500
Subject: gxyat
In-Reply-To: <a3b263e60911211332o78ac6662le803d77b4871c17a@mail.gmail.com>
Message-ID: <SAT.21.NOV.2009.194210.0500.>

On Sat, Nov 21, 2009 at 4:32 PM, Fil <fil at meteopt.com> wrote:

> Hi,
>
> I have a problem with the gxyat tool, it produces very large 32 bit png
> files, some files are like 4x as large as printim files which are 8 bit.
> Isn't it possible to set gxyat to produce 8 bit png files like printim?
>
>
Yes, you can. Type "gxyat" without arguments and read the documentation, in
particular example 7):

     7) Producing a PNG image file with the default 800x600 size, but
        piping the output through another program to reduce the file size:
        ga-> gxyat -o '|pngquant 256 > test.png'
        Notice that in this case the .png in the end is still used for
        determining the format of the output file.

The utility pngquant is included in the opengrads bundle. Notice that this
technique could also be used with other applications such as ImageMagick.

  Arlindo


--
Arlindo da Silva
dasilva at alum.mit.edu
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From taranaphy at YAHOO.COM  Sun Nov 22 22:22:26 2009
From: taranaphy at YAHOO.COM (tarana mahzabin)
Date: Sun, 22 Nov 2009 19:22:26 -0800
Subject: Windows GrADS
In-Reply-To: <77D48A10-2C43-43FC-8777-AFC8B2969B83@cola.iges.org>
Message-ID: <SUN.22.NOV.2009.192226.0800.>

Hi everybody,

Is there no version of Grads for windows ?  
Last time I was using GrADS Version 1.8 win32e.exe.

Also I have forgot my User Archive Password but  getting a new password...the following error message comes

"Error - unable to initiate communication with LISTSERV (errno=146). The server is probably not started."

Anyone please me...

 Tarana 



      Get your preferred Email name!
Now you can @ymail.com and @rocketmail.com. 
http://mail.promotions.yahoo.com/newdomains/aa/
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From j.faber at WEERONLINE.NL  Mon Nov 23 03:56:41 2009
From: j.faber at WEERONLINE.NL (Jennifer Faber)
Date: Mon, 23 Nov 2009 09:56:41 +0100
Subject: Windows GrADS
In-Reply-To: <795857.75915.qm@web35904.mail.mud.yahoo.com>
Message-ID: <MON.23.NOV.2009.095641.0100.>

Tarana,

Check out this website: http://sourceforge.net/projects/opengrads/files/
Use Grads 2.0 WIN 32. 


Otherwise you can also check out the website of GrADS: http://www.iges.org/grads/downloads.html And use the MS windows system

Good luck!


----- Original Message ----- 
  From: tarana mahzabin 
  To: GRADSUSR at LIST.CINECA.IT 
  Sent: Monday, November 23, 2009 4:22 AM
  Subject: Windows GrADS


  Hi everybody,

  Is there no version of Grads for windows ?  
  Last time I was using GrADS Version 1.8 win32e.exe.

  Also I have forgot my User Archive Password but  getting a new password...the following error message comes

  "Error - unable to initiate communication with LISTSERV (errno=146). The server is probably not started."

  Anyone please me...


  Tarana 




------------------------------------------------------------------------------
  Get your new Email address! 
  Grab the Email name you've always wanted before someone else does!
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From sushantpuranik at GMAIL.COM  Tue Nov 24 02:00:31 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Tue, 24 Nov 2009 12:30:31 +0530
Subject: how to make maximum wind plot along with level showing maximum
 wind for each grid
Message-ID: <TUE.24.NOV.2009.123031.0530.>

Hello Sir
I want to study the structure of a jet stream for that purpose i wish to
make a plot showing maximum wind speed for each grid box alongwith the level
in which the speed is maximum. Means it should print level with maximum wind
speed value. I am trying to solve this problem since last 15 days but i am
not able to solve it. Does anyone has any idea how i can make such plot
using GrADS. I am using ECMWF interim reanalysis data for this purpose.

Any suggestion is appreciated

Thanking you.

--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From mercedes8282 at GMAIL.COM  Mon Nov 23 19:01:47 2009
From: mercedes8282 at GMAIL.COM (J L)
Date: Tue, 24 Nov 2009 09:01:47 +0900
Subject: Hi. (about the password)
Message-ID: <TUE.24.NOV.2009.090147.0900.>

  Hi, I didn't get the password yet.  is it something I get from you or
different source?  please let me know.  thank you.


  Sincerely,
  John Lee


Jong-Hyung Lee, M.S.
Research Assistant
Korea Ocean Research & Development Institute
ANSAN P.O. Box 29, 425-600
KOREA
Tel: 010-7488-4623
E-mail:mercedes8282 at gmail.com <E-mail%3Amercedes8282 at gmail.com>
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From Charles.Seman at NOAA.GOV  Tue Nov 24 12:11:42 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Tue, 24 Nov 2009 12:11:42 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <72e8bd3d0911232300n4554f6bt5330d94929aca1ad@mail.gmail.com>
Message-ID: <TUE.24.NOV.2009.121142.0500.>

Sushant,

Here's some code that:
1) finds the height level "zmin" of the minimum temperature (represented
by variable ztav = zonal average of weighted time average temperature)
at each horizontal location "j" in a (y,z) physical domain
2) uses GrADS function "gr2xy"
(http://grads.iges.org/grads/gadoc/script.html#commands) to transform
the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
3) plots the values (xloc.j,yloc.j) on a (y,z) plot

    say '   find and save location of minimum temperature...'

    j=1
    while ( j <= ny )
      'set y 'j
      'set gxout print'
      'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
subwrd(rec3,1)
*      say result
      say '   ...j, zmin = 'j', 'zmin
      'query gr2xy 'j' 'zmin
      rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
subwrd(rec,6)
*      say result
      say '      xloc, yloc = 'xloc.j', 'yloc.j
      j=j+1
    endwhile
...
  if( plot_min_temp = 'yes' )
    say '   plot level of minimum temperature... '
    j=1
    while ( j <= ny )
      'set y 'j
*       say '      xloc, yloc = 'xloc.j', 'yloc.j
      'set line 1'
      'draw mark 3 'xloc.j' 'yloc.j' 0.03'
      j=j+1
    endwhile
  endif

Please contact me if you have any questions about this code, or would
like a script that does a plot.

Hope this helps,
Chuck


sushant puranik wrote:
> Hello Sir
> I want to study the structure of a jet stream for that purpose i wish
> to make a plot showing maximum wind speed for each grid box alongwith
> the level in which the speed is maximum. Means it should print level
> with maximum wind speed value. I am trying to solve this problem since
> last 15 days but i am not able to solve it. Does anyone has any idea
> how i can make such plot using GrADS. I am using ECMWF interim
> reanalysis data for this purpose.
>
> Any suggestion is appreciated
>
> Thanking you.
>
> --
> Sushant Puranik
> Junior Research Fellow
> Dept. of Atmospheric & Space Sciences,
> University of Pune,
> Pune-07,
> India.

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."


From naishi at METEO.MCGILL.CA  Tue Nov 24 12:40:05 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Tue, 24 Nov 2009 12:40:05 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <4B0C13CE.10305@noaa.gov>
Message-ID: <TUE.24.NOV.2009.124005.0500.>

Hi Chuck,
I also met this problem. And there are something unclear to me (only to
me!)in your last email, because:
(1) the level that has minimum temp isn't the same as the level where
there is maximum zonal wind speed;
(2) what does the meaning of the step (3) you said; sorry how can plot the
values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in the
height-latitude plane?
(3)could you be kind to tell me the basic ideas to get the maximum jet
stream, or... this means the contours of zonal wind speed in a specific
level as 250mb or ...?
(4)could you be kind to send me the script to do this plotting, and data
file too for a test.
I am quite confused about this! Thank you so much in advance!
Phillip


> Sushant,
>
> Here's some code that:
> 1) finds the height level "zmin" of the minimum temperature (represented
> by variable ztav = zonal average of weighted time average temperature)
> at each horizontal location "j" in a (y,z) physical domain
> 2) uses GrADS function "gr2xy"
> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>
>     say '   find and save location of minimum temperature...'
>
>     j=1
>     while ( j <= ny )
>       'set y 'j
>       'set gxout print'
>       'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
> subwrd(rec3,1)
> *      say result
>       say '   ...j, zmin = 'j', 'zmin
>       'query gr2xy 'j' 'zmin
>       rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
> subwrd(rec,6)
> *      say result
>       say '      xloc, yloc = 'xloc.j', 'yloc.j
>       j=j+1
>     endwhile
> ...
>   if( plot_min_temp = 'yes' )
>     say '   plot level of minimum temperature... '
>     j=1
>     while ( j <= ny )
>       'set y 'j
> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>       'set line 1'
>       'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>       j=j+1
>     endwhile
>   endif
>
> Please contact me if you have any questions about this code, or would
> like a script that does a plot.
>
> Hope this helps,
> Chuck
>
>
> sushant puranik wrote:
>> Hello Sir
>> I want to study the structure of a jet stream for that purpose i wish
>> to make a plot showing maximum wind speed for each grid box alongwith
>> the level in which the speed is maximum. Means it should print level
>> with maximum wind speed value. I am trying to solve this problem since
>> last 15 days but i am not able to solve it. Does anyone has any idea
>> how i can make such plot using GrADS. I am using ECMWF interim
>> reanalysis data for this purpose.
>>
>> Any suggestion is appreciated
>>
>> Thanking you.
>>
>> --
>> Sushant Puranik
>> Junior Research Fellow
>> Dept. of Atmospheric & Space Sciences,
>> University of Pune,
>> Pune-07,
>> India.
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
>  Charles Seman                                Charles.Seman at noaa.gov
>  U.S. Department of Commerce / NOAA / OAR
>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>  201 Forrestal Road                              fax: (609) 987-5063
>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>


From stefano.materia at CMCC.IT  Tue Nov 24 12:36:33 2009
From: stefano.materia at CMCC.IT (Stefano Materia)
Date: Tue, 24 Nov 2009 18:36:33 +0100
Subject: concatenate defined fields in time
In-Reply-To: <72e8bd3d0911232300n4554f6bt5330d94929aca1ad@mail.gmail.com>
Message-ID: <TUE.24.NOV.2009.183633.0100.>

Hello,

I have .ctl file with a monthly time series of 50 years, and I'd like to
make time series for each month. Namely, I want one variable to loop
through the 50 januaries, one to loop through the 50 februaries, etc.

example:

define jan1=field(t=1) "january of year #1" define jan2=field(t=13)
"january of year #2" ... ...

How can I define totjan = jan1 & jan2 & ......

so that

set t 1 50 d totjan

allows looping through jan1, jan2, etc... ? Is it possible to do that?

Many thanks, Stefano

--

---- PLEASE NOTE THE CHANGE OF EMAIL ADDRESS ----

Stefano Materia - PhD
CMCC - Centro Euro-Mediterraneo per i Cambiamenti Climatici
Viale Aldo Moro, 44 - 40127 Bologna (ITA)
tel. +390513782676, fax +390513782655
stefano.materia at cmcc.it

-------------------------------------------------


From Charles.Seman at NOAA.GOV  Tue Nov 24 12:53:19 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Tue, 24 Nov 2009 12:53:19 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <40209.132.206.43.20.1259084405.squirrel@www.meteo.mcgill.ca>
Message-ID: <TUE.24.NOV.2009.125319.0500.>

Hi Phillip,

Sorry I didn't explain further: the code was meant as an example of how
to find and plot extrema in a field of data.  To do the max wind, the
code would have to be modified to search in a wind speed field using
"maxloc"... and the exact code would also depend on the domain...

Hope this helps,
Chuck

Phillip Lin wrote:
> Hi Chuck,
> I also met this problem. And there are something unclear to me (only to
> me!)in your last email, because:
> (1) the level that has minimum temp isn't the same as the level where
> there is maximum zonal wind speed;
> (2) what does the meaning of the step (3) you said; sorry how can plot the
> values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in the
> height-latitude plane?
> (3)could you be kind to tell me the basic ideas to get the maximum jet
> stream, or... this means the contours of zonal wind speed in a specific
> level as 250mb or ...?
> (4)could you be kind to send me the script to do this plotting, and data
> file too for a test.
> I am quite confused about this! Thank you so much in advance!
> Phillip
>
>
>
>> Sushant,
>>
>> Here's some code that:
>> 1) finds the height level "zmin" of the minimum temperature (represented
>> by variable ztav = zonal average of weighted time average temperature)
>> at each horizontal location "j" in a (y,z) physical domain
>> 2) uses GrADS function "gr2xy"
>> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
>> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
>> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>>
>>     say '   find and save location of minimum temperature...'
>>
>>     j=1
>>     while ( j <= ny )
>>       'set y 'j
>>       'set gxout print'
>>       'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
>> subwrd(rec3,1)
>> *      say result
>>       say '   ...j, zmin = 'j', 'zmin
>>       'query gr2xy 'j' 'zmin
>>       rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
>> subwrd(rec,6)
>> *      say result
>>       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>       j=j+1
>>     endwhile
>> ...
>>   if( plot_min_temp = 'yes' )
>>     say '   plot level of minimum temperature... '
>>     j=1
>>     while ( j <= ny )
>>       'set y 'j
>> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>       'set line 1'
>>       'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>>       j=j+1
>>     endwhile
>>   endif
>>
>> Please contact me if you have any questions about this code, or would
>> like a script that does a plot.
>>
>> Hope this helps,
>> Chuck
>>
>>
>> sushant puranik wrote:
>>
>>> Hello Sir
>>> I want to study the structure of a jet stream for that purpose i wish
>>> to make a plot showing maximum wind speed for each grid box alongwith
>>> the level in which the speed is maximum. Means it should print level
>>> with maximum wind speed value. I am trying to solve this problem since
>>> last 15 days but i am not able to solve it. Does anyone has any idea
>>> how i can make such plot using GrADS. I am using ECMWF interim
>>> reanalysis data for this purpose.
>>>
>>> Any suggestion is appreciated
>>>
>>> Thanking you.
>>>
>>> --
>>> Sushant Puranik
>>> Junior Research Fellow
>>> Dept. of Atmospheric & Space Sciences,
>>> University of Pune,
>>> Pune-07,
>>> India.
>>>
>> --
>>
>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>> email address, not cjs at gfdl.noaa.gov.
>>
>> ********************************************************************
>>  Charles Seman                                Charles.Seman at noaa.gov
>>  U.S. Department of Commerce / NOAA / OAR
>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>  201 Forrestal Road                              fax: (609) 987-5063
>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>> ********************************************************************
>>
>> "The contents of this message are mine personally and do not necessarily
>> reflect any position of the Government or NOAA."
>>
>>

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."


From naishi at METEO.MCGILL.CA  Tue Nov 24 13:31:17 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Tue, 24 Nov 2009 13:31:17 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <4B0C1D8F.50300@noaa.gov>
Message-ID: <TUE.24.NOV.2009.133117.0500.>

Hi Chuck,
Thanks for your dedicated input to this problem we have.
And could you be kind to send me a script you did before for the sane or
similar question? Then, maybe it is much helpful for me to solve this
problem!
Thanks much!
Phillip

> Hi Phillip,
>
> Sorry I didn't explain further: the code was meant as an example of how
> to find and plot extrema in a field of data.  To do the max wind, the
> code would have to be modified to search in a wind speed field using
> "maxloc"... and the exact code would also depend on the domain...
>
> Hope this helps,
> Chuck
>
> Phillip Lin wrote:
>> Hi Chuck,
>> I also met this problem. And there are something unclear to me (only to
>> me!)in your last email, because:
>> (1) the level that has minimum temp isn't the same as the level where
>> there is maximum zonal wind speed;
>> (2) what does the meaning of the step (3) you said; sorry how can plot
>> the
>> values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in the
>> height-latitude plane?
>> (3)could you be kind to tell me the basic ideas to get the maximum jet
>> stream, or... this means the contours of zonal wind speed in a specific
>> level as 250mb or ...?
>> (4)could you be kind to send me the script to do this plotting, and data
>> file too for a test.
>> I am quite confused about this! Thank you so much in advance!
>> Phillip
>>
>>
>>
>>> Sushant,
>>>
>>> Here's some code that:
>>> 1) finds the height level "zmin" of the minimum temperature
>>> (represented
>>> by variable ztav = zonal average of weighted time average temperature)
>>> at each horizontal location "j" in a (y,z) physical domain
>>> 2) uses GrADS function "gr2xy"
>>> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
>>> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
>>> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>>>
>>>     say '   find and save location of minimum temperature...'
>>>
>>>     j=1
>>>     while ( j <= ny )
>>>       'set y 'j
>>>       'set gxout print'
>>>       'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
>>> subwrd(rec3,1)
>>> *      say result
>>>       say '   ...j, zmin = 'j', 'zmin
>>>       'query gr2xy 'j' 'zmin
>>>       rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
>>> subwrd(rec,6)
>>> *      say result
>>>       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>       j=j+1
>>>     endwhile
>>> ...
>>>   if( plot_min_temp = 'yes' )
>>>     say '   plot level of minimum temperature... '
>>>     j=1
>>>     while ( j <= ny )
>>>       'set y 'j
>>> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>       'set line 1'
>>>       'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>>>       j=j+1
>>>     endwhile
>>>   endif
>>>
>>> Please contact me if you have any questions about this code, or would
>>> like a script that does a plot.
>>>
>>> Hope this helps,
>>> Chuck
>>>
>>>
>>> sushant puranik wrote:
>>>
>>>> Hello Sir
>>>> I want to study the structure of a jet stream for that purpose i wish
>>>> to make a plot showing maximum wind speed for each grid box alongwith
>>>> the level in which the speed is maximum. Means it should print level
>>>> with maximum wind speed value. I am trying to solve this problem since
>>>> last 15 days but i am not able to solve it. Does anyone has any idea
>>>> how i can make such plot using GrADS. I am using ECMWF interim
>>>> reanalysis data for this purpose.
>>>>
>>>> Any suggestion is appreciated
>>>>
>>>> Thanking you.
>>>>
>>>> --
>>>> Sushant Puranik
>>>> Junior Research Fellow
>>>> Dept. of Atmospheric & Space Sciences,
>>>> University of Pune,
>>>> Pune-07,
>>>> India.
>>>>
>>> --
>>>
>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>> email address, not cjs at gfdl.noaa.gov.
>>>
>>> ********************************************************************
>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>  U.S. Department of Commerce / NOAA / OAR
>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>> ********************************************************************
>>>
>>> "The contents of this message are mine personally and do not
>>> necessarily
>>> reflect any position of the Government or NOAA."
>>>
>>>
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
>  Charles Seman                                Charles.Seman at noaa.gov
>  U.S. Department of Commerce / NOAA / OAR
>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>  201 Forrestal Road                              fax: (609) 987-5063
>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>


From jimp at HAWAII.EDU  Tue Nov 24 13:48:57 2009
From: jimp at HAWAII.EDU (James T. Potemra)
Date: Tue, 24 Nov 2009 08:48:57 -1000
Subject: concatenate defined fields in time
In-Reply-To: <4B0C19A1.2020905@cmcc.it>
Message-ID: <TUE.24.NOV.2009.084857.1000.>

Hi Stephano:

I think you can just use the "skip" function, e.g.,

'set t 1 600'
'd skip(taux,12)'

should plot every 12th point starting at t=1 (so every January).  You
can check by first plotting the entire time-series, then every 12th
point to make sure this is what you want, e.g.,

'set t 1 600'
'd taux'
'd skip(taux,12)'

Jim

Stefano Materia wrote:
> Hello,
>
> I have .ctl file with a monthly time series of 50 years, and I'd like to
> make time series for each month. Namely, I want one variable to loop
> through the 50 januaries, one to loop through the 50 februaries, etc.
>
> example:
>
> define jan1=field(t=1) "january of year #1" define jan2=field(t=13)
> "january of year #2" ... ...
>
> How can I define totjan = jan1 & jan2 & ......
>
> so that
>
> set t 1 50 d totjan
>
> allows looping through jan1, jan2, etc... ? Is it possible to do that?
>
> Many thanks, Stefano
>
> --
>
> ---- PLEASE NOTE THE CHANGE OF EMAIL ADDRESS ----
>
> Stefano Materia - PhD
> CMCC - Centro Euro-Mediterraneo per i Cambiamenti Climatici
> Viale Aldo Moro, 44 - 40127 Bologna (ITA)
> tel. +390513782676, fax +390513782655
> stefano.materia at cmcc.it
>
> -------------------------------------------------


From Charles.Seman at NOAA.GOV  Tue Nov 24 14:31:54 2009
From: Charles.Seman at NOAA.GOV (Charles Seman)
Date: Tue, 24 Nov 2009 14:31:54 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <46968.132.206.43.20.1259087477.squirrel@www.meteo.mcgill.ca>
Message-ID: <TUE.24.NOV.2009.143154.0500.>

Hi Phillip,

Please find attached a script "fig3ab.gs" and called script functions
"pause.gsf" and "scale_zdef_zlevs.gsf".  "scale_zdef_zlevs.gsf" makes a
local (temporary) ctl file with scaled vertical levels for plotting
purposes: here specifically to convert the original zdef zlevs values
from meters to kilometers (there may be a better way to do this; maybe
using commands "set ylab off", followed by "set yaxis ...").  I hope all
of the scripts needed for the fig3ab.gs script are attached;  if not,
please let me know.  You may have questions about these scripts; please
contact me if you do...

Hope this helps,
Chuck

Phillip Lin wrote:
> Hi Chuck,
> Thanks for your dedicated input to this problem we have.
> And could you be kind to send me a script you did before for the sane or
> similar question? Then, maybe it is much helpful for me to solve this
> problem!
> Thanks much!
> Phillip
>
>
>> Hi Phillip,
>>
>> Sorry I didn't explain further: the code was meant as an example of how
>> to find and plot extrema in a field of data.  To do the max wind, the
>> code would have to be modified to search in a wind speed field using
>> "maxloc"... and the exact code would also depend on the domain...
>>
>> Hope this helps,
>> Chuck
>>
>> Phillip Lin wrote:
>>
>>> Hi Chuck,
>>> I also met this problem. And there are something unclear to me (only to
>>> me!)in your last email, because:
>>> (1) the level that has minimum temp isn't the same as the level where
>>> there is maximum zonal wind speed;
>>> (2) what does the meaning of the step (3) you said; sorry how can plot
>>> the
>>> values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in the
>>> height-latitude plane?
>>> (3)could you be kind to tell me the basic ideas to get the maximum jet
>>> stream, or... this means the contours of zonal wind speed in a specific
>>> level as 250mb or ...?
>>> (4)could you be kind to send me the script to do this plotting, and data
>>> file too for a test.
>>> I am quite confused about this! Thank you so much in advance!
>>> Phillip
>>>
>>>
>>>
>>>
>>>> Sushant,
>>>>
>>>> Here's some code that:
>>>> 1) finds the height level "zmin" of the minimum temperature
>>>> (represented
>>>> by variable ztav = zonal average of weighted time average temperature)
>>>> at each horizontal location "j" in a (y,z) physical domain
>>>> 2) uses GrADS function "gr2xy"
>>>> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
>>>> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
>>>> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>>>>
>>>>     say '   find and save location of minimum temperature...'
>>>>
>>>>     j=1
>>>>     while ( j <= ny )
>>>>       'set y 'j
>>>>       'set gxout print'
>>>>       'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
>>>> subwrd(rec3,1)
>>>> *      say result
>>>>       say '   ...j, zmin = 'j', 'zmin
>>>>       'query gr2xy 'j' 'zmin
>>>>       rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
>>>> subwrd(rec,6)
>>>> *      say result
>>>>       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>       j=j+1
>>>>     endwhile
>>>> ...
>>>>   if( plot_min_temp = 'yes' )
>>>>     say '   plot level of minimum temperature... '
>>>>     j=1
>>>>     while ( j <= ny )
>>>>       'set y 'j
>>>> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>       'set line 1'
>>>>       'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>>>>       j=j+1
>>>>     endwhile
>>>>   endif
>>>>
>>>> Please contact me if you have any questions about this code, or would
>>>> like a script that does a plot.
>>>>
>>>> Hope this helps,
>>>> Chuck
>>>>
>>>>
>>>> sushant puranik wrote:
>>>>
>>>>
>>>>> Hello Sir
>>>>> I want to study the structure of a jet stream for that purpose i wish
>>>>> to make a plot showing maximum wind speed for each grid box alongwith
>>>>> the level in which the speed is maximum. Means it should print level
>>>>> with maximum wind speed value. I am trying to solve this problem since
>>>>> last 15 days but i am not able to solve it. Does anyone has any idea
>>>>> how i can make such plot using GrADS. I am using ECMWF interim
>>>>> reanalysis data for this purpose.
>>>>>
>>>>> Any suggestion is appreciated
>>>>>
>>>>> Thanking you.
>>>>>
>>>>> --
>>>>> Sushant Puranik
>>>>> Junior Research Fellow
>>>>> Dept. of Atmospheric & Space Sciences,
>>>>> University of Pune,
>>>>> Pune-07,
>>>>> India.
>>>>>
>>>>>
>>>> --
>>>>
>>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>>> email address, not cjs at gfdl.noaa.gov.
>>>>
>>>> ********************************************************************
>>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>>  U.S. Department of Commerce / NOAA / OAR
>>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>>> ********************************************************************
>>>>
>>>> "The contents of this message are mine personally and do not
>>>> necessarily
>>>> reflect any position of the Government or NOAA."
>>>>
>>>>
>>>>
>> --
>>
>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>> email address, not cjs at gfdl.noaa.gov.
>>
>> ********************************************************************
>>  Charles Seman                                Charles.Seman at noaa.gov
>>  U.S. Department of Commerce / NOAA / OAR
>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>  201 Forrestal Road                              fax: (609) 987-5063
>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>> ********************************************************************
>>
>> "The contents of this message are mine personally and do not necessarily
>> reflect any position of the Government or NOAA."
>>
>>

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
********************************************************************

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or NOAA."

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From naishi at METEO.MCGILL.CA  Tue Nov 24 15:01:21 2009
From: naishi at METEO.MCGILL.CA (Phillip Lin)
Date: Tue, 24 Nov 2009 15:01:21 -0500
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <4B0C34AA.5030109@noaa.gov>
Message-ID: <TUE.24.NOV.2009.150121.0500.>

Hi Chuck,
Thanks so much! I will test them first and then let you know the progress!
Phillip

> Hi Phillip,
>
> Please find attached a script "fig3ab.gs" and called script functions
> "pause.gsf" and "scale_zdef_zlevs.gsf".  "scale_zdef_zlevs.gsf" makes a
> local (temporary) ctl file with scaled vertical levels for plotting
> purposes: here specifically to convert the original zdef zlevs values
> from meters to kilometers (there may be a better way to do this; maybe
> using commands "set ylab off", followed by "set yaxis ...").  I hope all
> of the scripts needed for the fig3ab.gs script are attached;  if not,
> please let me know.  You may have questions about these scripts; please
> contact me if you do...
>
> Hope this helps,
> Chuck
>
> Phillip Lin wrote:
>> Hi Chuck,
>> Thanks for your dedicated input to this problem we have.
>> And could you be kind to send me a script you did before for the sane or
>> similar question? Then, maybe it is much helpful for me to solve this
>> problem!
>> Thanks much!
>> Phillip
>>
>>
>>> Hi Phillip,
>>>
>>> Sorry I didn't explain further: the code was meant as an example of how
>>> to find and plot extrema in a field of data.  To do the max wind, the
>>> code would have to be modified to search in a wind speed field using
>>> "maxloc"... and the exact code would also depend on the domain...
>>>
>>> Hope this helps,
>>> Chuck
>>>
>>> Phillip Lin wrote:
>>>
>>>> Hi Chuck,
>>>> I also met this problem. And there are something unclear to me (only
>>>> to
>>>> me!)in your last email, because:
>>>> (1) the level that has minimum temp isn't the same as the level where
>>>> there is maximum zonal wind speed;
>>>> (2) what does the meaning of the step (3) you said; sorry how can plot
>>>> the
>>>> values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in
>>>> the
>>>> height-latitude plane?
>>>> (3)could you be kind to tell me the basic ideas to get the maximum jet
>>>> stream, or... this means the contours of zonal wind speed in a
>>>> specific
>>>> level as 250mb or ...?
>>>> (4)could you be kind to send me the script to do this plotting, and
>>>> data
>>>> file too for a test.
>>>> I am quite confused about this! Thank you so much in advance!
>>>> Phillip
>>>>
>>>>
>>>>
>>>>
>>>>> Sushant,
>>>>>
>>>>> Here's some code that:
>>>>> 1) finds the height level "zmin" of the minimum temperature
>>>>> (represented
>>>>> by variable ztav = zonal average of weighted time average
>>>>> temperature)
>>>>> at each horizontal location "j" in a (y,z) physical domain
>>>>> 2) uses GrADS function "gr2xy"
>>>>> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
>>>>> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
>>>>> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>>>>>
>>>>>     say '   find and save location of minimum temperature...'
>>>>>
>>>>>     j=1
>>>>>     while ( j <= ny )
>>>>>       'set y 'j
>>>>>       'set gxout print'
>>>>>       'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
>>>>> subwrd(rec3,1)
>>>>> *      say result
>>>>>       say '   ...j, zmin = 'j', 'zmin
>>>>>       'query gr2xy 'j' 'zmin
>>>>>       rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
>>>>> subwrd(rec,6)
>>>>> *      say result
>>>>>       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>>       j=j+1
>>>>>     endwhile
>>>>> ...
>>>>>   if( plot_min_temp = 'yes' )
>>>>>     say '   plot level of minimum temperature... '
>>>>>     j=1
>>>>>     while ( j <= ny )
>>>>>       'set y 'j
>>>>> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>>       'set line 1'
>>>>>       'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>>>>>       j=j+1
>>>>>     endwhile
>>>>>   endif
>>>>>
>>>>> Please contact me if you have any questions about this code, or would
>>>>> like a script that does a plot.
>>>>>
>>>>> Hope this helps,
>>>>> Chuck
>>>>>
>>>>>
>>>>> sushant puranik wrote:
>>>>>
>>>>>
>>>>>> Hello Sir
>>>>>> I want to study the structure of a jet stream for that purpose i
>>>>>> wish
>>>>>> to make a plot showing maximum wind speed for each grid box
>>>>>> alongwith
>>>>>> the level in which the speed is maximum. Means it should print level
>>>>>> with maximum wind speed value. I am trying to solve this problem
>>>>>> since
>>>>>> last 15 days but i am not able to solve it. Does anyone has any idea
>>>>>> how i can make such plot using GrADS. I am using ECMWF interim
>>>>>> reanalysis data for this purpose.
>>>>>>
>>>>>> Any suggestion is appreciated
>>>>>>
>>>>>> Thanking you.
>>>>>>
>>>>>> --
>>>>>> Sushant Puranik
>>>>>> Junior Research Fellow
>>>>>> Dept. of Atmospheric & Space Sciences,
>>>>>> University of Pune,
>>>>>> Pune-07,
>>>>>> India.
>>>>>>
>>>>>>
>>>>> --
>>>>>
>>>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>>>> email address, not cjs at gfdl.noaa.gov.
>>>>>
>>>>> ********************************************************************
>>>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>>>  U.S. Department of Commerce / NOAA / OAR
>>>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>>>> ********************************************************************
>>>>>
>>>>> "The contents of this message are mine personally and do not
>>>>> necessarily
>>>>> reflect any position of the Government or NOAA."
>>>>>
>>>>>
>>>>>
>>> --
>>>
>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>> email address, not cjs at gfdl.noaa.gov.
>>>
>>> ********************************************************************
>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>  U.S. Department of Commerce / NOAA / OAR
>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>> ********************************************************************
>>>
>>> "The contents of this message are mine personally and do not
>>> necessarily
>>> reflect any position of the Government or NOAA."
>>>
>>>
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
>  Charles Seman                                Charles.Seman at noaa.gov
>  U.S. Department of Commerce / NOAA / OAR
>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>  201 Forrestal Road                              fax: (609) 987-5063
>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>
>


From luis.blacutt at GMAIL.COM  Tue Nov 24 15:11:19 2009
From: luis.blacutt at GMAIL.COM (luis blacutt)
Date: Tue, 24 Nov 2009 16:11:19 -0400
Subject: Problem with ctl file
Message-ID: <TUE.24.NOV.2009.161119.0400.>

Dear Grads users,

I'm writing a ctl file to open 24 (only 24) files,

baseline1pmg2jantp.grb
baseline1pmg2febtp.grb
baseline1pmg2martp.grb
.
.
.
baseline1pmg2janpr.grb
baseline1pmg2febpr.grb
baseline1pmg2marpr.grb
.
.
.

my ctl file is as follows:

dset ^baseline1pmg2%mctp.grb
index ^baseline1pmg2%mctp.grb.idx
options template
undef 9.999E+20
title Temperature at 1.5 m
*  produced by LFA 0.3
dtype grib 255
options yrev
ydef 37 linear -23.960000 0.439
xdef 36 linear -72.240000 0.440000
tdef 12 linear 00Z01jan1962 1mo
zdef 1 linear 1 1
vars 1
s03236  0 236,105,0  **
ENDVARS

As for now I'm trying to open only 12 files, with one variable, the error I
get is:

Scanning description file:  first.ctl
Open Error:  Can't open Station/Index map file baseline1pmg2%mctp.grb.idx
  The data file was not opened.

Thanks
Luis
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From sushantpuranik at GMAIL.COM  Wed Nov 25 03:25:43 2009
From: sushantpuranik at GMAIL.COM (sushant puranik)
Date: Wed, 25 Nov 2009 13:55:43 +0530
Subject: how to make maximum wind plot along with level showing
 maximum wind for each grid
In-Reply-To: <4B0C34AA.5030109@noaa.gov>
Message-ID: <WED.25.NOV.2009.135543.0530.>

Thank you for immediate reply i am testing those scripts. but while running
the script it shows error in the information of GrADS files

level_dir = '/net2/cjs/ljd/lima/ch3i1/pp/atmos_level/av/monthly_16yr'
don_dir   = '/net2/cjs/ljd/lima/ch3i1/pp/atmosdon/av/monthly_16yr'
ras_dir   =
'/net2/cjs/lwh/fms/lima/m45_am2p14_ch3i/pp/atmos_level/av/monthly_16yr'

sdir_months = 'Aug Sep'
month_days = '31 30'

/home/Sushant/Desktop/level_ctl = 'mc.o_zl.ctl' ; level_var = 'mc'
don_ctl1 = 'uceml_deep.o_zl.ctl'  ; don_var1 = 'uceml_deep'
don_ctl2 = 'umeml_deep.o_zl.ctl'  ; don_var2 = 'umeml_deep'
don_ctl3 = 'dmeml_deep.o_zl.ctl'  ; don_var3 = 'dmeml_deep'

ras_ctl = 'mc.o_zl.ctl' ; ras_var = 'mc'

temp_ctl = 'temp.o_zl.ctl' ; temp_var = 'temp'

So can you please send me those files.

Also i am using ECMWF data in the netcdf format. So there is no need to use
ctl files. It is possible to run the script without using such ctl file
info.

Sushant


On Wed, Nov 25, 2009 at 1:01 AM, Charles Seman <Charles.Seman at noaa.gov>wrote:

> Hi Phillip,
>
> Please find attached a script "fig3ab.gs" and called script functions
> "pause.gsf" and "scale_zdef_zlevs.gsf".  "scale_zdef_zlevs.gsf" makes a
> local (temporary) ctl file with scaled vertical levels for plotting
> purposes: here specifically to convert the original zdef zlevs values
> from meters to kilometers (there may be a better way to do this; maybe
> using commands "set ylab off", followed by "set yaxis ...").  I hope all
> of the scripts needed for the fig3ab.gs script are attached;  if not,
> please let me know.  You may have questions about these scripts; please
> contact me if you do...
>
>
> Hope this helps,
> Chuck
>
> Phillip Lin wrote:
>
>> Hi Chuck,
>> Thanks for your dedicated input to this problem we have.
>> And could you be kind to send me a script you did before for the sane or
>> similar question? Then, maybe it is much helpful for me to solve this
>> problem!
>> Thanks much!
>> Phillip
>>
>>
>>  Hi Phillip,
>>>
>>> Sorry I didn't explain further: the code was meant as an example of how
>>> to find and plot extrema in a field of data.  To do the max wind, the
>>> code would have to be modified to search in a wind speed field using
>>> "maxloc"... and the exact code would also depend on the domain...
>>>
>>> Hope this helps,
>>> Chuck
>>>
>>> Phillip Lin wrote:
>>>
>>>  Hi Chuck,
>>>> I also met this problem. And there are something unclear to me (only to
>>>> me!)in your last email, because:
>>>> (1) the level that has minimum temp isn't the same as the level where
>>>> there is maximum zonal wind speed;
>>>> (2) what does the meaning of the step (3) you said; sorry how can plot
>>>> the
>>>> values (xloc,j,yloc,j) on a (y,z)plot (this is the cross section in the
>>>> height-latitude plane?
>>>> (3)could you be kind to tell me the basic ideas to get the maximum jet
>>>> stream, or... this means the contours of zonal wind speed in a specific
>>>> level as 250mb or ...?
>>>> (4)could you be kind to send me the script to do this plotting, and data
>>>> file too for a test.
>>>> I am quite confused about this! Thank you so much in advance!
>>>> Phillip
>>>>
>>>>
>>>>
>>>>
>>>>  Sushant,
>>>>>
>>>>> Here's some code that:
>>>>> 1) finds the height level "zmin" of the minimum temperature
>>>>> (represented
>>>>> by variable ztav = zonal average of weighted time average temperature)
>>>>> at each horizontal location "j" in a (y,z) physical domain
>>>>> 2) uses GrADS function "gr2xy"
>>>>> (http://grads.iges.org/grads/gadoc/script.html#commands) to transform
>>>>> the grid point location (j,zmin) to plot location (xloc.j,yloc.j)
>>>>> 3) plots the values (xloc.j,yloc.j) on a (y,z) plot
>>>>>
>>>>>    say '   find and save location of minimum temperature...'
>>>>>
>>>>>    j=1
>>>>>    while ( j <= ny )
>>>>>      'set y 'j
>>>>>      'set gxout print'
>>>>>      'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
>>>>> subwrd(rec3,1)
>>>>> *      say result
>>>>>      say '   ...j, zmin = 'j', 'zmin
>>>>>      'query gr2xy 'j' 'zmin
>>>>>      rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
>>>>> subwrd(rec,6)
>>>>> *      say result
>>>>>      say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>>      j=j+1
>>>>>    endwhile
>>>>> ...
>>>>>  if( plot_min_temp = 'yes' )
>>>>>    say '   plot level of minimum temperature... '
>>>>>    j=1
>>>>>    while ( j <= ny )
>>>>>      'set y 'j
>>>>> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>>>>>      'set line 1'
>>>>>      'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>>>>>      j=j+1
>>>>>    endwhile
>>>>>  endif
>>>>>
>>>>> Please contact me if you have any questions about this code, or would
>>>>> like a script that does a plot.
>>>>>
>>>>> Hope this helps,
>>>>> Chuck
>>>>>
>>>>>
>>>>> sushant puranik wrote:
>>>>>
>>>>>
>>>>>  Hello Sir
>>>>>> I want to study the structure of a jet stream for that purpose i wish
>>>>>> to make a plot showing maximum wind speed for each grid box alongwith
>>>>>> the level in which the speed is maximum. Means it should print level
>>>>>> with maximum wind speed value. I am trying to solve this problem since
>>>>>> last 15 days but i am not able to solve it. Does anyone has any idea
>>>>>> how i can make such plot using GrADS. I am using ECMWF interim
>>>>>> reanalysis data for this purpose.
>>>>>>
>>>>>> Any suggestion is appreciated
>>>>>>
>>>>>> Thanking you.
>>>>>>
>>>>>> --
>>>>>> Sushant Puranik
>>>>>> Junior Research Fellow
>>>>>> Dept. of Atmospheric & Space Sciences,
>>>>>> University of Pune,
>>>>>> Pune-07,
>>>>>> India.
>>>>>>
>>>>>>
>>>>>>  --
>>>>>
>>>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>>>> email address, not cjs at gfdl.noaa.gov.
>>>>>
>>>>> ********************************************************************
>>>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>>>  U.S. Department of Commerce / NOAA / OAR
>>>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/<http://www.gfdl.noaa.gov/%7Ecjs/>
>>>>> ********************************************************************
>>>>>
>>>>> "The contents of this message are mine personally and do not
>>>>> necessarily
>>>>> reflect any position of the Government or NOAA."
>>>>>
>>>>>
>>>>>
>>>>>  --
>>>
>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>> email address, not cjs at gfdl.noaa.gov.
>>>
>>> ********************************************************************
>>>  Charles Seman                                Charles.Seman at noaa.gov
>>>  U.S. Department of Commerce / NOAA / OAR
>>>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>  201 Forrestal Road                              fax: (609) 987-5063
>>>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/<http://www.gfdl.noaa.gov/%7Ecjs/>
>>> ********************************************************************
>>>
>>> "The contents of this message are mine personally and do not necessarily
>>> reflect any position of the Government or NOAA."
>>>
>>>
>>>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
> Charles Seman                                Charles.Seman at noaa.gov
> U.S. Department of Commerce / NOAA / OAR
> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
> 201 Forrestal Road                              fax: (609) 987-5063
> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/<http://www.gfdl.noaa.gov/%7Ecjs/>
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>
>
> ************************************************************************
> *
> *  To use:  "grads -p"
> *
> *  Script calculates and plots zonally averaged cross-sections of the
> *  time averaged height interpolated "mass flux" from the GrADS files
> *  specified below (with an option to overlay the level of minimum
> *  temperature):
> *
> ************************************************************************
> function mass_flux (args)
>
> 'reinit'
>
> ************************************************************************
> *  Allow external GrADS functions
> ************************************************************************
>
> rc = gsfallow("on")
>
> ************************************************************************
> *  Pause between plots?
> ************************************************************************
>
> do_pause = 'no'
>
> ************************************************************************
> *  GrADS meta file output?
> ************************************************************************
>
> do_print = 'yes'
>
> ************************************************************************
> *  Information for GrADS files
> ************************************************************************
>
> level_dir = '/net2/cjs/ljd/lima/ch3i1/pp/atmos_level/av/monthly_16yr'
> don_dir   = '/net2/cjs/ljd/lima/ch3i1/pp/atmosdon/av/monthly_16yr'
> ras_dir   =
> '/net2/cjs/lwh/fms/lima/m45_am2p14_ch3i/pp/atmos_level/av/monthly_16yr'
>
> sdir_months = 'Aug Sep'
> month_days = '31 30'
>
> level_ctl = 'mc.o_zl.ctl' ; level_var = 'mc'
> don_ctl1 = 'uceml_deep.o_zl.ctl'  ; don_var1 = 'uceml_deep'
> don_ctl2 = 'umeml_deep.o_zl.ctl'  ; don_var2 = 'umeml_deep'
> don_ctl3 = 'dmeml_deep.o_zl.ctl'  ; don_var3 = 'dmeml_deep'
>
> ras_ctl = 'mc.o_zl.ctl' ; ras_var = 'mc'
>
> temp_ctl = 'temp.o_zl.ctl' ; temp_var = 'temp'
>
> ************************************************************************
> *  Information for the plots
> ************************************************************************
>
> plot_min_max = 'no'
> *
> *  Mass flux variable scale and units
> *
> var_scale = 1000
> var_units = '(g m`a-2`n s`a-1`n)'
> *
> *  Height levels (scale GrADS ctl file levels from "m" to "km")
> *
> zscale = 1./1000.
> zlevs = '0 18'
> ylabel_int = 2
> ylabel = 'Height (km)'
> *
> *  Define the contour levels...
> *
> *contour_levels = '1 3 5 7 9 11 13'
> *contour_levels = '0 2 4 6 8 10 12 14 16'
> contour_levels = '0 0.01 0.1 1 3 5 7 10 15'
> *
> *  Plot level of minimum temperature?
> *
> plot_min_temp = 'yes'
>
> ************************************************************************
> *  Plot variables' page limits
> ************************************************************************
>
> pvar_vpage.1 = '0 8.5 4.8 9.3'
> pvar_vpage.2 = '0 8.5 0.3 4.8'
> pvar_parea   = '1 7.0 0.5 4.0'
>
> xl_pvar_parea = subwrd(pvar_parea,1)
> yt_pvar_parea = subwrd(pvar_parea,4)
>
> ************************************************************************
> *  Title information for the plots
> ************************************************************************
>
> mod_title = 'FMS lima 1983-1998'
> var_title = 'Mass Flux 'var_units
> avg_title = 'Zonal average of weighted time average'
>
> figure_panel.1 = '(a)' ; model.1 = 'AM2-D'
> figure_panel.2 = '(b)' ; model.2 = 'AM2'
> *
> *  Define names for the "sdir_months" subdirectories...
> *
> define_months()
>
> ************************************************************************
> *  GrADS metafile for output
> ************************************************************************
>
> if( do_print = 'yes' )
>  'enable print fig3ab.gx'
> endif
>
> *-----------------------------------------------------------------------
> *  Determine number of months to average...
> *-----------------------------------------------------------------------
>
> n=1
> month = subwrd(sdir_months,n)
> if( month = '' )
>  say
>  say 'No months specified in variable "sdir_months"...'
>  say 'Exiting script'
>  say
>  exit
> else
>  while ( month != '' )
>    n=n+1
>    month = subwrd(sdir_months,n)
>  endwhile
>  nmonths=n-1
> endif
>
> first = subwrd(sdir_months,1) ; last = subwrd(sdir_months,nmonths)
> months = ''_name.first'-'_name.last''
>
> *-----------------------------------------------------------------------
> *  Verify height levels...
> *-----------------------------------------------------------------------
>
> l=1
> zlv.l = subwrd(zlevs,l)
> if( zlv.l = '' )
>  say
>  say 'No pressure levels specified in variable "zlevs"...'
>  say 'Exiting script'
>  say
>  exit
> else
>  while ( zlv.l != '' )
>    l=l+1
>    zlv.l = subwrd(zlevs,l)
>  endwhile
>  nl = l-1
>  if( nl > 2 )
>    say
>    say 'More than two height levels ("nl" = 'nl') specified in variable
> "zlevs"...'
>    say 'Exiting script'
>    say
>    exit
>  else
>    if( zlv.2 <= zlv.1 )
>      say
>      say 'Height level "2" (= 'zlv.2') not greater than height level "1" (=
> 'plv.1')...'
>      say 'Exiting script'
>      say
>      exit
>    endif
>  endif
> endif
>
> say
> say '------------------------------------------------------------------'
> say 'Calculate zonal averages of weighted time average "mass fluxes"...'
> say '------------------------------------------------------------------'
> say
> say 'Initialize time sum variables for time average...'
> say
> *
> *  Use GrADS ctl files for the first "month" to define time sum
> variables...
> *
> month1 = subwrd(sdir_months,1)
> say
> say '--------------------'
> say 'Model: 'model.1
> say '--------------------'
> say
>
> ctl_file = ''level_dir'/'month1'/'level_ctl
> *
> *  Make local ctl file with scaled vertical levels...
> *
> ctl_file_scale = 'mass_flux.scale.ctl'
> scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
> say 'Open GrADS file:'
> say '...'ctl_file_scale
> 'open 'ctl_file_scale
>
> 'query file'
> rec5 = sublin(result,5)
> nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9)
> 'set x 1 'nx
> 'set y 1 'ny
> 'set z 1 'nz
> 'set t 1'
> say '   initialize: wtsum1m'
> 'define wtsum1m = const('level_var',0,-a)'
> 'close 1'
> '!rm 'ctl_file_scale
>
> if( plot_min_temp = 'yes' )
> *
> *  Make local ctl file with scaled vertical levels...
> *
>  ctl_file = ''level_dir'/'month1'/'temp_ctl
>  ctl_file_scale = 'temp.scale.ctl'
>  scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
>  say 'Open GrADS file:'
>  say '...'ctl_file_scale
>  'open 'ctl_file_scale
>  'query file'
>  rec5 = sublin(result,5)
>  nxt = subwrd(rec5,3) ; nyt = subwrd(rec5,6) ; nzt = subwrd(rec5,9)
>  if( nxt != nx )
>    say '...nxt = 'nxt
>    say '...nx  = 'nx
>    exit
>  endif
>  if( nyt != ny )
>    say '...nyt = 'nyt
>    say '...ny  = 'ny
>    exit
>  endif
>  if( nzt != nz )
>    say '...nzt = 'nzt
>    say '...nz  = 'nz
>    exit
>  endif
>  'set x 1 'nx
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  say '   initialize: wtsum1t'
>  'define wtsum1t = const('temp_var',0,-a)'
>  'close 1'
>  '!rm 'ctl_file_scale
> endif
>
> say
> say '--------------------'
> say 'Model: 'model.2
> say '--------------------'
> say
>
> ctl_file = ''ras_dir'/'month1'/'ras_ctl
> *
> *  Make local ctl file with scaled vertical levels...
> *
> ctl_file_scale = 'mass_flux.scale.ctl'
> scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
> say 'Open GrADS file:'
> say '...'ctl_file_scale
> 'open 'ctl_file_scale
> 'query file'
> rec5 = sublin(result,5)
> nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9)
> 'set x 1 'nx
> 'set y 1 'ny
> 'set z 1 'nz
> 'set t 1'
> say '   initialize: wtsum2m'
> 'define wtsum2m = const('ras_var',0,-a)'
> 'close 1'
> '!rm 'ctl_file_scale
>
> if( plot_min_temp = 'yes' )
> *
> *  Make local ctl file with scaled vertical levels...
> *
>  ctl_file = ''ras_dir'/'month1'/'temp_ctl
>  ctl_file_scale = 'temp.scale.ctl'
>  scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
>  say 'Open GrADS file:'
>  say '...'ctl_file_scale
>  'open 'ctl_file_scale
>  'query file'
>  rec5 = sublin(result,5)
>  nxt = subwrd(rec5,3) ; nyt = subwrd(rec5,6) ; nzt = subwrd(rec5,9)
>  if( nxt != nx )
>    say '...nxt = 'nxt
>    say '...nx  = 'nx
>    exit
>  endif
>  if( nyt != ny )
>    say '...nyt = 'nyt
>    say '...ny  = 'ny
>    exit
>  endif
>  if( nzt != nz )
>    say '...nzt = 'nzt
>    say '...nz  = 'nz
>    exit
>  endif
>  'set x 1 'nx
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  say '   initialize: wtsum2t'
>  'define wtsum2t = const('temp_var',0,-a)'
>  'close 1'
>  '!rm 'ctl_file_scale
> endif
>
> if( do_pause = 'yes' )
>  pause()
> endif
> *
> *  Calculate running time sum variables for "mass flux" variable...
> *
> n=1
> ndays=0
> *-----------------------------------------------------------------------
> while ( n <= nmonths )
> *-----------------------------------------------------------------------
> *
> *  Name of the month...
> *
>  month = subwrd(sdir_months,n)
> *
> *  Days in the month...
> *
>  days = subwrd(month_days,n)
>
>  say
>  say '------------------------'
>  say 'Month = 'month', days = 'days
>  say '------------------------'
>  say
>  say
>  say '--------------------'
>  say 'Model: 'model.1
>  say '--------------------'
>  say
>
>  ctl_file.1 = ''level_dir'/'month'/'level_ctl
>  ctl_file.2 = ''don_dir'/'month'/'don_ctl1
>  ctl_file.3 = ''don_dir'/'month'/'don_ctl2
>  ctl_file.4 = ''don_dir'/'month'/'don_ctl3
> *
> *  Make local ctl files with scaled vertical levels...
> *
>  ctl_file_scale.1 = 'mass_flux.1.scale.ctl'
>  scale_zdef_zlevs(ctl_file.1,zscale,ctl_file_scale.1)
>  ctl_file_scale.2 = 'mass_flux.2.scale.ctl'
>  scale_zdef_zlevs(ctl_file.2,zscale,ctl_file_scale.2)
>  ctl_file_scale.3 = 'mass_flux.3.scale.ctl'
>  scale_zdef_zlevs(ctl_file.3,zscale,ctl_file_scale.3)
>  ctl_file_scale.4 = 'mass_flux.4.scale.ctl'
>  scale_zdef_zlevs(ctl_file.4,zscale,ctl_file_scale.4)
>
>  say 'Open GrADS file 1:'
>  say '...'ctl_file_scale.1
>  'open 'ctl_file_scale.1
>  say 'Open GrADS file 2:'
>  say '...'ctl_file_scale.2
>  'open 'ctl_file_scale.2
>  say 'Open GrADS file 3:'
>  say '...'ctl_file_scale.3
>  'open 'ctl_file_scale.3
>  say 'Open GrADS file 4:'
>  say '...'ctl_file_scale.4
>  'open 'ctl_file_scale.4
>  say 'GrADS files ready'
>
>  say
>  say '   calculate weighted (using days = 'days') "mass flux" time sum'
>  say '     ('level_var'.1+'don_var1'.2+'don_var2'.3+'don_var3'.4)'
>  say '   for current month and add it to the time sum variable...'
>  say
>  'set dfile 1'
>  'set x 1 'nx
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  'define wtsum1m = wtsum1m +
> 'days'*('level_var'.1+'don_var1'.2+'don_var2'.3+'don_var3'.4)'
>
>  'close 4' ; 'close 3' ; 'close 2' ; 'close 1'
>  '!rm 'ctl_file_scale.1
>  '!rm 'ctl_file_scale.2
>  '!rm 'ctl_file_scale.3
>  '!rm 'ctl_file_scale.4
>
>  if( plot_min_temp = 'yes' )
>
>    ctl_file = ''level_dir'/'month'/'temp_ctl
> *
> *  Make local ctl file with scaled vertical levels...
> *
>    ctl_file_scale = 'temp.scale.ctl'
>    scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
>    say 'Open GrADS file:'
>    say '...'ctl_file_scale
>    'open 'ctl_file_scale
>    say 'GrADS file ready'
>    say
>    say '   calculate weighted (using days = 'days') temperature time sum'
>    say '   for current month and add it to the time sum variable...'
>    say
>
>    'set x 1 'nx
>    'set y 1 'ny
>    'set z 1 'nz
>    'set t 1'
>    'define wtsum1t = wtsum1t + 'days'*'temp_var
>
>    'close 1'
>    '!rm 'ctl_file_scale
>
>  endif
>
>  say
>  say '--------------------'
>  say 'Model: 'model.2
>  say '--------------------'
>  say
>
>  ctl_file = ''ras_dir'/'month'/'ras_ctl
> *
> *  Make local ctl file with scaled vertical levels...
> *
>  ctl_file_scale = 'mass_flux.scale.ctl'
>  scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
>  say 'Open GrADS file:'
>  say '...'ctl_file_scale
>  'open 'ctl_file_scale
>  say 'GrADS file ready'
>
>  say
>  say '   calculate weighted (using days = 'days') "mass flux" time sum'
>  say '     ('ras_var'.1)'
>  say '   for current month and add it to the time sum variable...'
>  say
>  'query file'
>  rec5 = sublin(result,5)
>  nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9)
>  'set x 1 'nx
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  'define wtsum2m = wtsum2m + 'days'*'ras_var
>
>  'close 1'
>  '!rm 'ctl_file_scale
>
>  if( plot_min_temp = 'yes' )
>
>    ctl_file = ''ras_dir'/'month'/'temp_ctl
> *
> *  Make local ctl file with scaled vertical levels...
> *
>    ctl_file_scale = 'temp.scale.ctl'
>    scale_zdef_zlevs(ctl_file,zscale,ctl_file_scale)
>
>    say 'Open GrADS file:'
>    say '...'ctl_file_scale
>    'open 'ctl_file_scale
>    say 'GrADS file ready'
>    say
>    say '   calculate weighted (using days = 'days') temperature time sum'
>    say '   for current month and add it to the time sum variable...'
>    say
>
>    'set x 1 'nx
>    'set y 1 'ny
>    'set z 1 'nz
>    'set t 1'
>    'define wtsum2t = wtsum2t + 'days'*'temp_var
>
>    'close 1'
>    '!rm 'ctl_file_scale
>
>  endif
>
>  say
>  say '...finished month'
>  say
>
>  if( do_pause = 'yes' )
>    pause()
>  endif
>
>  n=n+1
>  ndays=ndays+days
> *-----------------------------------------------------------------------
> endwhile
> *-----------------------------------------------------------------------
> say
> say '---------------------------'
> say 'Finished weighted time sums'
> say '---------------------------'
> say
> say
> say '------------------------------------------------------------------'
> say 'Calculate zonal averages of the weighted time averages'
> say 'of the weighted time sums, and plot the data...'
> say '------------------------------------------------------------------'
> say
> say 'Use GrADS ctl files for the first "month" to define time averaged
> variables for plotting...'
> *
> *  Model #1
> *
> ctl_file.1      = ''level_dir'/'month1'/'level_ctl
> ctl_file_temp.1 = ''level_dir'/'month1'/'temp_ctl
> *
> *  Model #2
> *
> ctl_file.2      = ''ras_dir'/'month1'/'ras_ctl
> ctl_file_temp.2 = ''ras_dir'/'month1'/'temp_ctl
> *
> *  Initialize min/max variables...
> *
> min = 1e6 ; max = -1e6
> *
> *  Start a new frame, and plot a title at top of page...
> *
> ptitle_top(var_title,avg_title,months,pvar_parea)
>
> m=1
> while ( m <= 2 )
>
>  say
>  say '--------------------'
>  say 'Model: 'model.m
>  say '--------------------'
>  say
>
>  if( plot_min_temp = 'yes' )
>    say
>    say 'Find and save level of minimum temperature for the'
>    say 'zonal and weighted time average temperature...'
>    say
> *
> *  Make local ctl file with scaled vertical levels...
> *
>    ctl_file_scale = 'temp.scale.ctl'
>    scale_zdef_zlevs(ctl_file_temp.m,zscale,ctl_file_scale)
>
>    say 'Open GrADS file:'
>    say '...'ctl_file_scale
>    'open 'ctl_file_scale
>    say 'GrADS file ready'
>    say
>    'query file'
>    rec5 = sublin(result,5)
>    nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9)
>
>    say '   calculate weighted time average (using ndays = 'ndays')...'
>
>    'set x 1 'nx
>    'set y 1 'ny
>    'set z 1 'nz
>    'set t 1'
>    'define tav = wtsum'm't/'ndays
>
>    say '   calculate zonal averages of the weighted time average...'
>
>    'set x 1'
>    'set y 1 'ny
>    'set z 1 'nz
>    'set t 1'
>    'define ztav = ave(tav,x=1,x='nx')'
>
>    say '   plot zonal average of the weighted time average...'
>
>    'set vpage 'pvar_vpage.m
>    'set parea 'pvar_parea
>    'set grads off'
>    'set gxout contour'
>    'set clab off'
>    'set ccolor 0'
>    'set xlab off'
>    'set ylab off'
>    'd ztav'
>
>    say '   find and save location of minimum temperature...'
>
>    j=1
>    while ( j <= ny )
>      'set y 'j
>      'set gxout print'
>      'd minloc(ztav,z=1,z='nz')' ; rec3 = sublin(result,3) ; zmin =
> subwrd(rec3,1)
> *      say result
>      say '   ...j, zmin = 'j', 'zmin
>      'query gr2xy 'j' 'zmin
>      rec = sublin(result,1) ; xloc.j = subwrd(rec,3) ; yloc.j =
> subwrd(rec,6)
> *      say result
>      say '      xloc, yloc = 'xloc.j', 'yloc.j
>      j=j+1
>    endwhile
>
>    'undefine wtsum'm't' ; 'undefine tav' ; 'undefine ztav'
>    'close 1'
>    '!rm 'ctl_file_scale
>
>  endif
>
>  say
>  say 'Calculate and plot zonally averaged "mass flux"...'
>  say
> *
> *  Make local ctl file with scaled vertical levels...
> *
>  ctl_file_scale = 'mass_flux.scale.ctl'
>  scale_zdef_zlevs(ctl_file.m,zscale,ctl_file_scale)
>
>  say 'Open GrADS file:'
>  say '...'ctl_file_scale
>  'open 'ctl_file_scale
>  say 'GrADS file ready'
>  say
>  say
>  'query file'
>  rec5 = sublin(result,5)
>  nx = subwrd(rec5,3) ; ny = subwrd(rec5,6) ; nz = subwrd(rec5,9)
>
>  say '   calculate weighted "mass flux" time average (using ndays =
> 'ndays')'
>
>  'set x 1 'nx
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  'define tav = wtsum'm'm/'ndays
>
>  say '   calculate zonal averages of the weighted time average...'
>
>  'set x 1'
>  'set y 1 'ny
>  'set z 1 'nz
>  'set t 1'
>  'define ztav = 'var_scale'*ave(tav,x=1,x='nx')'
>
>  say '   plot zonal averages of time averaged "mass flux"'
>  'set vpage 'pvar_vpage.m
>  'set parea 'pvar_parea
>  'set grads off'
>  'set clevs 'contour_levels
>  'set gxout shaded'
>  'set xlab on'
>  'set ylab on'
>  'set ylint 'ylabel_int
>  'set x 1'
>  'set y 1 'ny
>  'set lev 'zlevs
>  'set t 1'
>  'd ztav'
>  'run cbar.gs 0.7'
>  'draw title \\\ 'model.m
> *  'draw xlab Latitude \\\'
>  'draw ylab \\\ 'ylabel
>  xfp = xl_pvar_parea + 0.1
>  yfp = yt_pvar_parea + 0.2
>  'set string 1 l 6'
>  'set strsiz 0.13'
>  'draw string 'xfp' 'yfp' 'figure_panel.m
>  'set gxout stat'
>  'd ztav'
>  min_max = sublin(result,8)
>  say '   'min_max
>  min = subwrd(min_max,4)
>  max = subwrd(min_max,5)
>  if( plot_min_max = 'yes' )
>    xmm = xl_pvar_parea + 0.1
>    ymm = yt_pvar_parea - 0.1
>    'set string 1 l 4'
>    'set strsiz 0.08'
>    'draw string 'xmm' 'ymm' 'min_max' '
>  endif
>
>  if( plot_min_temp = 'yes' )
>    say '   plot level of minimum temperature... '
>    j=1
>    while ( j <= ny )
>      'set y 'j
> *       say '      xloc, yloc = 'xloc.j', 'yloc.j
>      'set line 1'
>      'draw mark 3 'xloc.j' 'yloc.j' 0.03'
>      j=j+1
>    endwhile
>  endif
>
>  'undefine wtsum'm'm' ; 'undefine tav' ; 'undefine ztav'
>  'close 1'
>  '!rm 'ctl_file_scale
>
>  say
>  say '...finished plot for: 'model.m
>  say
>  m=m+1
> endwhile
>
> say
> say '--------------'
> say 'Finished plots'
> say '--------------'
> say
>
> if( do_print = 'yes' )
>  'print'
>  'disable print'
> endif
>
> say
> say '--------------------------'
> say '"Mass flux" min/max values'
> say '--------------------------'
> say
> say 'min = 'min'  max = 'max
>
> say
> say '************************************************'
> say ' Finished with this script.'
> say '************************************************'
> say
>
> if( batch_mode = 'yes' )
>  quit
> endif
>
> return
>
> ************************************************************************
> *
> function define_months()
> *
> * Define "names" for all months...
> *
> _name.Jan = 'January'
> _name.Feb = 'February'
> _name.Mar = 'March'
> _name.Apr = 'April'
> _name.May = 'May'
> _name.Jun = 'June'
> _name.Jul = 'July'
> _name.Aug = 'August'
> _name.Sep = 'September'
> _name.Oct = 'October'
> _name.Nov = 'November'
> _name.Dec = 'December'
> *
> return
> *
> ************************************************************************
>
> ************************************************************************
> *
> function ptitle_top(title,subtitle,months,plim)
> *
> * Plots a title at the top of the page
> *
> x1 = subwrd(plim,1)
> x2 = subwrd(plim,2)
> xc = x1 + (x2-x1)/2
> 'c'
> 'set vpage 0 8.5 0 11'
> 'set string 1 c 6'
> 'set strsiz 0.14'
> 'draw string 'xc' 10.2 'title
> *'draw string 'xc' 10.2 'subtitle
> 'draw string 'xc'  9.8 'months
> *
> return
> *
> ************************************************************************
>
>


--
Sushant Puranik
Junior Research Fellow
Dept. of Atmospheric & Space Sciences,
University of Pune,
Pune-07,
India.
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From davide.sacchetti at ARPAL.ORG  Wed Nov 25 04:04:29 2009
From: davide.sacchetti at ARPAL.ORG (Davide Sacchetti)
Date: Wed, 25 Nov 2009 10:04:29 +0100
Subject: concatenate defined fields in time
In-Reply-To: <4B0C19A1.2020905@cmcc.it>
Message-ID: <WED.25.NOV.2009.100429.0100.>

concatenating defined fields it's hard
but you may have other chances
If I understood correctly your data contain monthly time series for 50
years, then your ctl should have a line like:
        tdef 600 linear datestart 1mo

if you want to see just januaries you could do:
        set t 1 last
        set missconn on
        display skip(variable,12)

to see februaries:
        set t 2 last
        ...

If this could not help, on my opinion the best thing could be to divide
januaries from februaries in different files

Have a nice day


Davide

On Tue, 2009-11-24 at 18:36 +0100, Stefano Materia wrote:
> Hello,
>
> I have .ctl file with a monthly time series of 50 years, and I'd like to
> make time series for each month. Namely, I want one variable to loop
> through the 50 januaries, one to loop through the 50 februaries, etc.
>
> example:
>
> define jan1=field(t=1) "january of year #1" define jan2=field(t=13)
> "january of year #2" ... ...
>
> How can I define totjan = jan1 & jan2 & ......
>
> so that
>
> set t 1 50 d totjan
>
> allows looping through jan1, jan2, etc... ? Is it possible to do that?
>
> Many thanks, Stefano
>
> --
>
> ---- PLEASE NOTE THE CHANGE OF EMAIL ADDRESS ----
>
> Stefano Materia - PhD
> CMCC - Centro Euro-Mediterraneo per i Cambiamenti Climatici
> Viale Aldo Moro, 44 - 40127 Bologna (ITA)
> tel. +390513782676, fax +390513782655
> stefano.materia at cmcc.it
>
> -------------------------------------------------
>
--
Sacchetti Davide
Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
ARPAL Unit?  Tecnica Complessa di livello Regionale
V.le B