Incorrect timestamp of one terra L1A granule

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hanzhi.lin
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Incorrect timestamp of one terra L1A granule

by hanzhi.lin » Tue Apr 04, 2023 11:35 am America/New_York

Hi,

I found one Terra L1A granule stored in OB.DAAC might show an incorrect timestamp. The OB's name of this granule is TERRA_MODIS.20010816T173146.GEO.hdf. Maybe the timestamp ought to be 20010816.1730 (YYYYMMDD.HHMM) ?

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Hanzhi

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OB SeaDAS - xuanyang02
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Re: Incorrect timestamp of one terra L1A granule

by OB SeaDAS - xuanyang02 » Wed Apr 05, 2023 3:14 pm America/New_York

Actually,

T2001228173000.L1A_LAC has 17:31:45 as start time (RANGEBEGINNINGTIME= 17:31:44.786658), therefore the corresponding GEO file is

TERRA_MODIS.20010816T173146.GEO.hdf, which has the same start time (perhaps 1 second off).

Here is the OBPG File Naming Convention -- https://oceancolor.gsfc.nasa.gov/docs/filenaming-convention/
However, our modis L1A files do not follow the convention.

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