Dropped MODIS scan lines

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benj
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Joined: Fri Jun 18, 2010 8:30 am America/New_York

Dropped MODIS scan lines

by benj » Mon Jan 09, 2017 5:41 am America/New_York

Hi Sean and Tommy

We've noticed large blocks of files affected in the same way several times since I made the original post above (more examples between 0100 and 0440 this morning). Is there any news on whether there is a more serious problem with the sensor?

Thanks
Ben

EDIT: Four times to get right names. Finger-and-brain fail...

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OB ODPS - towens
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Dropped MODIS scan lines

by OB ODPS - towens » Mon Jan 09, 2017 7:20 am America/New_York

From the announcements I have seen, the problem seems to be on the ground with the data acquisition/processing system, not with the instrument:
e.g.:
-------------------------------------------------------
Lance-MODIS Aqua 2017-01-05 22:00-22:15 reprocessing

2017-01-06T01:39:00Z
Aqua NRT MYD00F and MYD0[13] products between 2017-01-05 22:00 and 22:15z were created using substantially missing MYD00S (L0) and MYDGBAD (Eph) inputs. Better MYD00S inputs were delivered later, and they are now being used to manually reprocess these products. The new MYD00F and PM1EPHND_NRT are normal sized, so the reprocessed products should not have any missing data.
---------------------------------------------------------

Tommy

benj
Posts: 22
Joined: Fri Jun 18, 2010 8:30 am America/New_York

Dropped MODIS scan lines

by benj » Mon Jan 09, 2017 7:36 am America/New_York

OK, thank you. Does that mean that these should be OK by the time the refined stream catches up? As it happens I'm not too worried about these specific granules (outside our AOI for the most part), but like I say, it does seem to be happening a fair bit and sometimes it's more of a problem.

OB ODPS - towens
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Posts: 179
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Dropped MODIS scan lines

by OB ODPS - towens » Mon Jan 09, 2017 9:02 am America/New_York

Yes - we should have the better version of the data in place for the refined processing.

Tommy

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