[gradsusr] Why cannot contour grid for this file?

[Huddleston, John]

Diego

If you look at your file with wgrib you will see that UGRD only has data at Z=150 and Z=100 whereas VGRD has data at all three levels 850,150, and 100.

The order of the ZDEF in the control file created by Wesley's grib2ctl.pl script is 850 150 100.

When you tried to display UGRD data it was using the 850 level.

Set your Z to 150 or 100 if you want to see UGRD data.

John Huddleston, PhD, PE
________________________________
From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] On Behalf Of Diego Morelli [diego.morelli at trs.it]
Sent: Wednesday, May 12, 2010 8:34 AM
To: 'GrADS Users Forum'
Subject: [gradsusr] 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:

[cid:image001.jpg at 01CAF1F0.EF6D1930]

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


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