MODIS DB production problems with OCSSW

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liamgumley
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MODIS DB production problems with OCSSW

by liamgumley » Tue Dec 01, 2020 4:43 pm America/New_York

Production of MODIS direct broadcast (DB) Level 1 data with the OCSSW v7.5.3 processing software halted early on 01-DEC-2020. Early indications point to an out-of-date version of de200.dat and therefore de200.eos. See below:
https://lance.modaps.eosdis.nasa.gov/news/
https://wiki.earthdata.nasa.gov/display/DAS/Planetary+Ephemeris+Data

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OB.DAAC - SeanBailey
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MODIS DB production problems with OCSSW

by OB.DAAC - SeanBailey » Tue Dec 01, 2020 5:03 pm America/New_York

Yes, just pushed a fix to our operational processing system.  An updated planetary ephemeris file will be made available to SeaDAS users tomorrow (shift whistle just blew :grin:)

As the LANCE post mentions, the ephemeris was *supposed* to be valid until Jan 1st 2021...for some reason not yet identified (or explained to me) MODIS GEO decided to go bonkers a month early.
BTW, the full ephemeris that is used is actually valid until 31 March 2169 ...someone made "an executive decision" to have the version used by MODIS truncated...

Sean

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