[gradsusr] Cannot able to plot NARR data

[kalyan chakravarthy]

Hi Wesley,

Thanks a lot for your reply. I have made the changes as suggested by you,
but still I didn't find any changes in the plot.

Regards,
Kalyan


On Wed, Feb 1, 2017 at 6:40 AM, Wesley Ebisuzaki - NOAA Federal <
wesley.ebisuzaki at noaa.gov> wrote:

> Kalyan,
>
>     GrADS has only 1 time variable.
>     Typical grib files typically have up to 3 time variables:  ex. 3-6 hr
> ave
>          1:   start time of forecast (analysis)
>          2:   start time of average (accumulation)
>          3:   end time of average (accumulation)
>
>        For an analysis, time 1=2=3
>        For a forecast, time 2=3
>
>      Gribmap maps time 1, 2 or 3 into the grads time.
>      For time 1: -0 (zero)
>      For time 2: use -b
>      For time 3: (default option)
>
> For reanalysis files, you usually use time #1 (gribmap -0) so that you
> can use the template option.
>
> It appears that you used option #3 (gribmap with the default time).  Given
> your tdef line in the control file, you have to set time to 06Z27SEP2010.
>
> ga-> set t 2
> Time values set: 2010:9:27:6 2010:9:27:6
> ga-> set lat 0 90
> LAT set to 0 90
> ga-> set lon -140 0
> LON set to -140 0
> ga-> d hgtprs(lev=500)-hgtprs(lev=1000)
>
> Wesley
>
>
> On Wed, Feb 1, 2017 at 1:09 AM, kalyan chakravarthy <
> kalyan4space at gmail.com> 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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>>
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