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

[Wesley Ebisuzaki]

Diego,

grib2ctl.pl doesn't handle missing levels very well. grib2ctl found 3 
pressure levels as expected.

> * z has 3 levels, for prs
> zdef 3 levels
> 850 150 100
grib2ctl found UGRD on two levels and wrote the line
> UGRDprs 2 33,100,0 ** (profile) u wind [m/s]
With NCEP files, the missing levels occur at the smallest pressures, so 
"2" is ok. With
your file, the missing level was at 850, so you have to edit the ctl 
file and change the "2" into a "3".
> UGRDprs 3 33,100,0 ** (profile) u wind [m/s]
For what it is worth, a grib2 version of your data wouldn't have had a 
problem.

Wesley Ebisuzaki





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
>
> 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:
>
> 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
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>