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P2G V3.0 files cannot be displayed in AWIPS #417

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kathys opened this issue Feb 18, 2022 · 3 comments · Fixed by pytroll/satpy#2032
Closed

P2G V3.0 files cannot be displayed in AWIPS #417

kathys opened this issue Feb 18, 2022 · 3 comments · Fixed by pytroll/satpy#2032

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@kathys
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kathys commented Feb 18, 2022

I am using Polar2Grid Version 3.0 (polar2grid-swbundle-20211219-125805). I have tried creating AWIPS crefl and I and m-band files using commands like this:

polar2grid.sh -r viirs_sdr -w awips_tiled --num-workers 4 -p i01 -g lcc_conus_300 --sector-id LCC --letters --compress -f

polar2grid.sh -r viirs_sdr -w awips_tiled --awips-true-color --awips-false-color --num-workers 4 -g lcc_conus_300 --sector-id LCC --letters --compress -f

The software successfully executes the commands and creates files, but they cannot be ingested by AWIPS. I compared the files headers between two of the same tiled NetCDF files, and they are very, very different.

I am attaching the orignal and new headers dumped from the files, and I put the NetCDF files on bumi at /data/users/kathys/version_3_0_timing/sample_tiles

The files below are also available at the bumi directory.

orig_awips.txt

new_awips.txt

@kathys
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kathys commented Feb 18, 2022

I also added and i04 set of files too to the bumi directory also. Might be better to start with that since it does not require combining with other files like the true and false color crefl files do.

@kathys
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kathys commented Feb 18, 2022

Lee Cronce helped me to identify problems in the files. First, he said y and x units need to be "meters" instead of "meter". Next, there is not a "units" attribute in the file for i04 data array. It needs to be "kelvin".

@djhoese
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djhoese commented Feb 18, 2022

Strange on the meter/meters thing as we've tested these files with GLM and that worked just fine. They are both CF-compatible units so that's annoying on AWIPS's part. As for the units, in the crefl09 you gave me they have units equal to %. I can double check the BT bands and work on the meter/meters fix.

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