[gradsusr] R: I: Why cannot contour grid for this file?

[Diego Morelli]

Great!!!!

Thank you Jennifer. I applied your suggest and it works fine.

 

Thank you so much again.

 

Diego

 

  _____  

Da: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] Per
conto di Jennifer Adams
Inviato: mercoledì 12 maggio 2010 20.09
A: GrADS Users Forum
Oggetto: Re: [gradsusr] I: Why cannot contour grid for this file?

 

Diego, 

grib2ctl gives you a descriptor that looks like this (irrelevant stuff
omitted): 

zdef 3 levels 850 150 100

vars 2

UGRDprs 2 33,100,0 ** (profile) u wind [m/s]

VGRDprs 3 34,100,0 ** (profile) v wind [m/s]

ENDVARS

 

Because the number of levels in the UGRDprs variable declaration (2) is less
than the number of levels in the ZDEF entry (3), GrADS assumes the only
valid levels are the first two, and that is why it is giving you an error
message when you try to retrieve data at Z=3. If you change 

   UGRDprs 2 33,100,0 ** (profile) u wind [m/s]

to

   UGRDprs 3 33,100,0 ** (profile) u wind [m/s]

and rerun gribmap, using the -v option to make sure all the records in your
file match, then everything will work the way you expect, and you'll have
missing data for UGRDprs at 850 mb. 

--Jennifer

 

 

On May 12, 2010, at 1:53 PM, Diego Morelli wrote:





Hello.

I don’t know if my question is clear, so let me repeat.

Using in GrADS the attached file, the ugrd can’t be displaied for the level
100.

Look at this pic in order to have clear the situation I have in GrADS

 

<image001.jpg>

 

What is wrong in the attached file that prevent GrADS to display the data?

In the warning message I don’t see any abnormal situation: In my opinion,
the “grid limits of request” appears correct in front of the “grid limits of
file”, then what this message means?

 

Regards,

 

Diego

  _____  

Da: Diego Morelli [mailto:diego.morelli at trs.it] 
Inviato: mercoledì 12 maggio 2010 16.34
A: 'GrADS Users Forum'
Oggetto: Why cannot contour grid for this file?

 

Hello.

I have this file in the attachment.

 

It get 3 contains this parameters: ugrdprs, for levels 150/100, vgrdprs for
levels 850/150/100.

 

If I use this file in grads, it can display all the 3 levels for vgrdprs.

For ugrdprs the display command produces a correct map for level 150 and an
empty map for level 100 (Entire grid is undefined) and this message:

 

<image002.jpg>

 

Why this behaviour? Can you say me what doesn’t like to GrADS for ugrdprs on
level 100?

 

 

The products I’m using are:

grib2ctl v0.9.12.5p45

wgrib v1.8.0.12

GrADS Ver. 2.0.a7.1

 

The command I’m using before grads are:

perl grib2ctl.pl LFPW00190281.20090718151333_P4400PT7758_BPMG12.101562_1.b
>  LFPW00190281.20090718151333_P4400PT7758_BPMG12.101562_1.ctl

./gribmap – i  LFPW00190281.20090718151333_P4400PT7758_BPMG12.101562_1.ctl –
0.

 

 

Thank you in advance.

 

Diego

 

 

<LFPW00190281.20090718151333_P4400PT7758_BPMG12.101562_1.b>

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--

Jennifer M. Adams

IGES/COLA

4041 Powder Mill Road, Suite 302

Calverton, MD 20705

jma at cola.iges.org

 





 

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