[gradsusr] Cannot able to plot NARR data

[kalyan chakravarthy]

Hi James,

Thanks for your reply. I can also observed the same plots.
What does the data mean, i.e whether the data is missing or Do we need to
regrid the data file to plot.

Regards,
Kalyan




On Wed, Feb 1, 2017 at 9:31 AM, James T. Potemra <jimp at hawaii.edu> wrote:

> Kalyan,
>
> Does your display show "Entire Grid Undefined" or is it simply a blank
> map?  Using your descriptor file and data set if I do:
> ga-> open model
> ga-> d HGTprs(lev=500)-HGTprs(lev=1000)
>
> I get a blank screen (image1.png).  If instead I do this:
>
> ga-> open model
> ga-> set gxout grfill
> ga-> d HGTprs(lev=500)-HGTprs(lev=1000)
>
> I see a bunch of scattered points (image2.png).  Zooming to an arbitrary
> 10x10-degree region you can see these in more detail (image3.png)
>
> ga-> open model
> ga-> set gxout grfill
> ga-> set lat 20 30
> ga-> set lat 10 20
> ga-> set lon -160 -140
> ga-> d HGTprs(lev=500)-HGTprs(lev=1000)
>
> I believe this means you don't have enough contiguous points to generate
> contours, thus the need for gxout=grfill.
>
> Jim
>
>
> On 1/31/17 8:09 PM, kalyan chakravarthy wrote:
>
> Thanks a lot for your reply. I have given the range of longitudes between
> 140W to 0. Still I didn't observe any changes in the plot.
>
> Regards,
> Kalyan
>
>
> On Tue, Jan 31, 2017 at 5:54 PM, James T. Potemra <jimp at hawaii.edu> wrote:
>
>> Hi Kalyan,
>>
>> There are a lot of missing data in your file, so that might be why
>> contours/shading doesn't show up.  If you use "set gxout grfill" before "d
>> thick" you can see all the valid grid cells.  Also note that your longitude
>> values are somewhat unconventional and run from -220 -0.4375 (140E to 0),
>> so make sure your "set lon x1 x1" is within that range.
>>
>> Jim
>>
>> On 1/31/17 3:31 PM, kalyan chakravarthy wrote:
>>
>> Hi Everyone,
>>
>> By using NARR data, I am trying to plot the thickness between 500-1000mb
>> levels. I am having an ctl file to open the grib file.
>>
>> I have used the following commands to read and plot the file
>>
>> Open model.ctl
>> set lat y1 y2
>> set lon x1 x2
>> define thick=HGTprs(lev=500)-HGTprs(lev=1000)
>> d thick
>>
>> But I didn't see any shaded or contours drawn. Can anyone helpme with the
>> problem.
>>
>> I have attached the data files.
>>
>> Thanks in advance
>> Kalyan​
>>  model.ctl
>> <https://drive.google.com/file/d/0B5GylLRnzAPJeFBpUDNPOFc3aGM/view?usp=drive_web>
>> ​​
>>  narr-a_221_20100927_0600_000.grb
>> <https://drive.google.com/file/d/0B5GylLRnzAPJaG4tMTd5YkpxWTg/view?usp=drive_web>
>> ​​
>>  narr-a_221_20100927_hh00_000.idx
>> <https://drive.google.com/file/d/0B5GylLRnzAPJWHBOQjRGMFJwZlU/view?usp=drive_web>
>> ​
>>
>>
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