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

[Diego Morelli]

Hello Wesley, how are you?.

Yes, yes, I understood. You and Jennifer have been very clear.

I just tried to edit the descriptor file ctl as you suggest, and it works
fine for level 100.

Ok, it means that, if necessary, I will split my file so that I will ensure
that there are only, in the produced files, parameters on the same list of
levels.

Thank you vey much to you all.

Diego



-----Messaggio originale-----
Da: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] Per
conto di Wesley Ebisuzaki
Inviato: mercoledì 12 maggio 2010 20.54
A: GrADS Users Forum
Oggetto: Re: [gradsusr] I: Why cannot contour grid for this file?

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
>
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>
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