modis_GEO -- Percent valid data (46.00) is less than threshold (95.00)

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oo_processing
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modis_GEO -- Percent valid data (46.00) is less than threshold (95.00)

by oo_processing » Wed Feb 01, 2023 1:46 pm America/New_York

Dear Support,

It's V2022.2 that I'm using now. I have problems with the following L0 files while OK with others:
MOD00.P2023031.1535_1.PDS
MOD00.P2023031.1620_1.PDS
MOD00.P2023031.1625_1.PDS
MOD00.P2023031.1630_1.PDS
MOD00.P2023031.1635_1.PDS
MOD00.P2023031.1640_1.PDS
MOD00.P2023031.1645_1.PDS

$ modis_L1A MOD00.P2023031.1635.PDS -o MOD00.P2023031.1635.L1A_LAC --startnudge=0 --stopnudge=10

MODIS L1A version 6.0.6, built Nov 28 2022 12:23:38
scan: 0 out of 201 Wed Feb 1 13:11:42 2023
scan: 10 out of 201 Wed Feb 1 13:11:43 2023
scan: 20 out of 201 Wed Feb 1 13:11:43 2023
scan: 30 out of 201 Wed Feb 1 13:11:43 2023
scan: 40 out of 201 Wed Feb 1 13:11:43 2023
scan: 50 out of 201 Wed Feb 1 13:11:43 2023
scan: 60 out of 201 Wed Feb 1 13:11:43 2023
scan: 70 out of 201 Wed Feb 1 13:11:43 2023
scan: 80 out of 201 Wed Feb 1 13:11:43 2023
scan: 90 out of 201 Wed Feb 1 13:11:43 2023
scan: 100 out of 201 Wed Feb 1 13:11:43 2023
scan: 110 out of 201 Wed Feb 1 13:11:44 2023
scan: 120 out of 201 Wed Feb 1 13:11:44 2023
scan: 130 out of 201 Wed Feb 1 13:11:44 2023
scan: 140 out of 201 Wed Feb 1 13:11:44 2023
scan: 150 out of 201 Wed Feb 1 13:11:44 2023
scan: 160 out of 201 Wed Feb 1 13:11:44 2023
scan: 170 out of 201 Wed Feb 1 13:11:44 2023
scan: 180 out of 201 Wed Feb 1 13:11:44 2023
scan: 190 out of 201 Wed Feb 1 13:11:44 2023

$ modis_GEO 'MOD00.P2023031.1635.L1A_LAC' -o 'MOD00.P2023031.1635.GEO' --threshold=95 --att1=/shares/cms_optics/apps/seadas/ocssw/V2022.2/var/anc/2023/031/PM1ATTNR.P2023031.1600.003 --eph1=/shares/cms_optics/apps/seadas/ocssw/V2022.2/var/anc/2023/031/PM1EPHND.P2023031.1200.003

MODIS GEO version 6.1.0, built Nov 28 2022 12:23:25
scan: 0 out of 197 Wed Feb 1 13:11:45 2023
scan: 10 out of 197 Wed Feb 1 13:11:46 2023
scan: 20 out of 197 Wed Feb 1 13:11:48 2023
scan: 30 out of 197 Wed Feb 1 13:11:49 2023
scan: 40 out of 197 Wed Feb 1 13:11:50 2023
scan: 50 out of 197 Wed Feb 1 13:11:52 2023
scan: 60 out of 197 Wed Feb 1 13:11:53 2023
scan: 70 out of 197 Wed Feb 1 13:11:55 2023
scan: 80 out of 197 Wed Feb 1 13:11:56 2023
scan: 90 out of 197 Wed Feb 1 13:11:57 2023
scan: 100 out of 197 Wed Feb 1 13:11:58 2023
scan: 110 out of 197 Wed Feb 1 13:12:00 2023
scan: 120 out of 197 Wed Feb 1 13:12:01 2023
scan: 130 out of 197 Wed Feb 1 13:12:02 2023
scan: 140 out of 197 Wed Feb 1 13:12:04 2023
scan: 150 out of 197 Wed Feb 1 13:12:05 2023
scan: 160 out of 197 Wed Feb 1 13:12:07 2023
scan: 170 out of 197 Wed Feb 1 13:12:08 2023
scan: 180 out of 197 Wed Feb 1 13:12:10 2023
scan: 190 out of 197 Wed Feb 1 13:12:11 2023
Percent valid data (46.00) is less than threshold (95.00)

Thanks in advance,
Yuyuan

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Re: modis_GEO -- Percent valid data (46.00) is less than threshold (95.00)

by OB.DAAC - SeanBailey » Thu Feb 02, 2023 11:15 am America/New_York

It's not you, or the code. There is some bad orbit data from 1/31. If we get updated att/eph data that corrects the problem, the data will be reprocessed (you'd need to pull the updated files, but I do not know when or even if they will be available).

If you look at https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Ancillary/Aqua-MODIS/2023/031/ you can see that the sizes of the att/eph data for that time period you list vary and are smaller than the "good" ones.

Sean

oo_processing
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Re: modis_GEO -- Percent valid data (46.00) is less than threshold (95.00)

by oo_processing » Thu Feb 02, 2023 2:22 pm America/New_York

I see. Thanks for the clarification.

Yuyuan

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