[gradsusr] Issues opening GOES-16 NetCDF files

[Robert Kuligowski]

Karl and Jeff,

     The problem is that the GOES-16 data aren't on a constant grid or 
on a standard map projection, so I don't know of an easy way to make a 
GrADS control file that can adequately capture the navigation 
information in the file.  I've resorted to writing FORTRAN 90 code to 
remap the GOES-16 data onto a lat / lon grid and then plotting that in 
GrADS.

Cheers,

Bob

On 11/7/2018 1:50 PM, Jeff Duda wrote:
> This page (http://cola.gmu.edu/grads/gadoc/gradcomdxdfopen.html) will 
> give you all the information you need to create a control file. You 
> can use ncdump -h or ncdump -c to get the attribute and dimension 
> information and coordinate dumps needed.
>
> Jeff Duda
>
> On Wed, Nov 7, 2018 at 11:36 AM Schneider, Karl P <kps5442 at psu.edu 
> <mailto:kps5442 at psu.edu>> wrote:
>
>     Bob, to clarify, I can create an image, but the problem is that
>     like you mentioned, I’m not sure of a way to overlay the basemap.
>
>     Jeff,
>     That seems like what I need to do. Could you provide an example of
>     a control file that might do the trick?
>
>     Karl
>
>
>     On Nov 7, 2018, at 1:12 PM, Jeff Duda <jeffduda319 at gmail.com
>     <mailto:jeffduda319 at gmail.com>> wrote:
>
>>     Have you tried writing a short control file and using xdfopen
>>     instead? That is a way of getting around netcdf files that aren't
>>     perfectly formatted.
>>
>>     Jeff Duda
>>
>>     On Wed, Nov 7, 2018 at 9:45 AM Schneider, Karl P <kps5442 at psu.edu
>>     <mailto:kps5442 at psu.edu>> wrote:
>>
>>         Hi everyone,
>>
>>         I'm looking for a way to plot some satellite data in GrADS.
>>         I've found a source for GOES-16 netcdf data, but its format
>>         is not compatible as shown below; the lat and lon are set to
>>         the number of grid points in the file, not the lat/lon extent
>>         of the file:
>>
>>
>>         ga-> sdfopen
>>         OR_ABI-L2-CMIPC-M3C02_G16_s20183111612182_e20183111614555_c20183111615060.nc
>>         Scanning self-describing file:
>>         OR_ABI-L2-CMIPC-M3C02_G16_s20183111612182_e20183111614555_c20183111615060.nc
>>         SDF file has no discernable time coordinate -- using default
>>         values.
>>         SDF file
>>         OR_ABI-L2-CMIPC-M3C02_G16_s20183111612182_e20183111614555_c20183111615060.nc
>>         is open as file 1
>>         LON set to 0 9999
>>         LAT set to 0 5999
>>
>>         I've seen this issue pop up previously on the forum, but
>>         there was no good answer I could make sense of. I'm hoping
>>         someone could share some code with me to help resolve the
>>         issue, or better yet point me to a source of netcdf's that
>>         can be read in via the sdfopen command.
>>
>>         Thanks,
>>         Karl
>>
>>
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>>
>>
>>     -- 
>>     Jeff Duda, Research Scientist
>>
>>     University of Colorado Boulder
>>
>>     Cooperative Institute for Research in Environmental Sciences
>>
>>     NOAA/OAR/ESRL/Global Systems Division
>>
>>     Boulder, CO
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>
>
> -- 
> Jeff Duda, Research Scientist
>
> University of Colorado Boulder
>
> Cooperative Institute for Research in Environmental Sciences
>
> NOAA/OAR/ESRL/Global Systems Division
>
> Boulder, CO
>
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-- 
Bob Kuligowski, Ph.D.
Meteorologist
NOAA/NESDIS/Center for Satellite Applications and Research (STAR)

Mailing Address:
National Oceanic and Atmospheric Administration
NESDIS STAR/SMCD
Bob Kuligowski
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Phone:  (301) 683-3593
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