[gradsusr] meteosat grib2 (grb) files

Wed May 11 12:46:58 EDT 2016

Athanasios,

G2ctl knows about minutes.  If the TDEF line in the ctl file doesn't
include the minute
field, the minute value is zero.  The TDEF line does not support seconds.

Wesley

On Wed, May 11, 2016 at 11:09 AM, Athanasios Karagiannidis <thankar at live.com
> wrote:

> Dear Wesley
>
> As I said the solution you provided worked vey well.
> The only problem I see at the moment is that the time inofrmation is
> somehow cut to date and hour. It leaves out the minutes!
> Check the ctl file I send.
>
> Is there a way to correct that?
>
> Regards
>
> Athanasios F. Karagiannidis
> Physicist, PhD Meteorology and Climatology
> E-mail: thankar at live.com
>
>
>
> ------------------------------
> From: thankar at live.com
> To: gradsusr at gradsusr.org
> Date: Thu, 28 Apr 2016 07:58:11 +0000
> Subject: Re: [gradsusr] meteosat grib2 (grb) files
>
> Dear Wesley
>
> Thanx for your help.
>
> This time it worked! I really don't know what happened in my previous try,
> but your solution seems to be working perfectly.
>
> Kind Regards
>
> Athanasios F. Karagiannidis
> Physicist, PhD Meteorology and Climatology
> E-mail: thankar at live.com
>
>
>
> ------------------------------
> Date: Wed, 27 Apr 2016 15:11:18 -0400
> From: wesley.ebisuzaki at noaa.gov
> To: gradsusr at gradsusr.org
> Subject: Re: [gradsusr] meteosat grib2 (grb) files
>
> Athanasios,
>
> I recreated the plot using the directions given.  See the attachment.
> I am using wgrib2 v2.0.4 on a Redhat Linux system.
>
> Wesley
>
>
> On Wed, Apr 27, 2016 at 1:20 PM, Athanasios Karagiannidis <
> thankar at live.com> wrote:
>
> Dear Wesley
>
> Firstly I tried exactly the same thing that you typed (-90:1801:0.1) and I
> got the wrong visualisation of "test1.png" I sent. Then I experimented with
> other values (e.g. 0:1801:01) and did not succeed either.
> As you can see in Test1.png the image seems to be shifted to the north by
> 90 degrees.
> Could that be corrected somehow?
>
>
> Kind regards
>
> Athanasios F. Karagiannidis
> Physicist, PhD Meteorology and Climatology
> E-mail: thankar at live.com
>
>
>
> ------------------------------
> Date: Tue, 26 Apr 2016 13:23:23 -0400
> From: wesley.ebisuzaki at noaa.gov
> To: gradsusr at gradsusr.org
> Subject: Re: [gradsusr] meteosat grib2 (grb) files
>
> Dear Athanasios,
>
> This is exactly what I typed
>
> wgrib2 201604250700-fir.grb -set_pdt +0 -grib junk.grb
> wgrib2 junk.grb  -set_grib_type c2 -lola 0:3600:0.1 -90:1801:0.1 junk2.grb  grib
> g2ctl junk2.grb >junk2.ctl
> gribmap -i junk2.ctl
>
> The plot should be of a region that is centered over 0N OE.
>
> In the second line, latitude range is     -90:1801:0.1
>
> I.e, the grid latitude starts at 90S, and goes northward by 0.1 degrees for 1801 points.
>
> In your version, you had 0:1801:0.1
>
> So the latitude goes from the equator to 180N. I forgot the case
> when the latitude is larger than 90N.
>
>
> Wesley
>
> PS to get rid of missing fcst statement, modify the line to
>
> wgrib2 201604250700-fir.grb -set_pdt +0 -set_ftime anl -grib new_fir.grb2
>
> On Tue, Apr 26, 2016 at 12:00 PM, Athanasios Karagiannidis <
> thankar at live.com> wrote:
>
> Dear Wesley
>
> When I try to convert to PTD 4.0 I get the following
>
>
> *1:0:d=2016042507:FIREDI:no_level:-2147483647 missing fcst:*
> but i guess that is not a problem.
>
> However, after converting to the new grid something goes wrong because the
> image seems shifted by 90 degrees to the north (please see test1.png). I
> tried some tests but nothing worked. For example when I asked for the
> regriding to start from 0 degrees north (wgrib2 new-fir.grb -set_grib_type
> c2 -lola 0:3600:0.1 *0*:1801:0.1 lola-fir.grb grib), I got the image of
> test2.png. The image there seems cut and not shifted to the north!
>
> What can I do for that?
>
> Kind Regards
>
> Athanasios F. Karagiannidis
> Physicist, PhD Meteorology and Climatology
> E-mail: thankar at live.com
>
>
>
> ------------------------------
> Date: Tue, 26 Apr 2016 09:34:58 -0400
> From: wesley.ebisuzaki at noaa.gov
> To: gradsusr at gradsusr.org
> Subject: Re: [gradsusr] meteosat grib2 (grb) files
>
> Dear Athanasios,
>
> There are two problems that need to overcome before displaying with GrADS.
>
> 1)  The file is using grib2 Product Definition Template (PDT) 4.30.
> GrADS doesn't
>       support PDT 4.30.   So the first step to convert to a PDT that GrADS
> can handle
>       such as PDT 4.0.   (You should consider making the grib file with
> PDT 4.0 unless
>       you want to document the spectral bands that are being used.)
>
>       to convert to PDT 4.0:    wgrib2 201604250700-fir.grb -set_pdt +0
> -grib new-fir.grb
>       requires a newer wgrib2
>
> If you want to see the raw grid (space view perspective)
>
>      g2ctl -raw new-fir.grb >new-fir.ctl
>      gribmap -i new-fir.ctl
>
> 2)  The other problem is that GrADS doesn't have the code to handle
> space-view perspective
>        (orographic).   Wgrib2 to the rescue again.  Here we convert the
> field to a
>        longitude-latitude 0.1 degree global grid.
>
>         wgrib2 new-fir.grb -set_grib_type c2 -lola 0:3600:0.1 -90:1801:0.1
> lola-fir.grb grib
>
>  GrADS/g2ctl can handle lola-fir.grb
>
>
> Yours,
> Wesley
>
>
> On Tue, Apr 26, 2016 at 5:10 AM, Athanasios Karagiannidis <
> thankar at live.com> wrote:
>
> Hello to all.
>
> I'm trying to open and visualize the contents of the "fire detection
> indicator" parameter that is included in meteosat grib2 file like the one I
> attach.
>
> When trying to create the ctl file i get the following message.
>
> [...]$ g2ctl.pl -0 201604250700-fir.grb >201604250700-fir.ctl
> *** script needs to be modified ***
> unknown user-defined grid
>
> As a consequence the ctl file that is created can not be opened by gribmap
>
> [...]$ gribmap -0 -i 201604250700-fir.ctl
> Open Error:  missing XDEF record
> Open Error:  missing YDEF record
>   The data file was not opened
>
> and no idx file is created.
>
> Could someone provide any help?
>
> Athanasios F. Karagiannidis
> Physicist, PhD Meteorology and Climatology
> E-mail: thankar at live.com
>
>
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