Processing MODIS L1A to L2 with partial ephemeris available

Use this Forum to find information on, or ask a question about, NASA Earth Science data.
Post Reply
jstum
Posts: 83
Joined: Mon Jul 04, 2005 4:54 am America/New_York
Answers: 0
Been thanked: 1 time

Processing MODIS L1A to L2 with partial ephemeris available

by jstum » Wed Mar 01, 2023 11:30 am America/New_York

Good evening,
I have seen that MODIS L1A are back, but it is not yet the case for ephemeris and attitude. So far, I used as input of modis_GEO PM1ATTNR_NRT files and PM1EPHND_NRT files available every 5 mn. I see that only PM1ATTNR files (every 2 hours) and only one PM1EPHND file at 12h00 are available. I launched modis_GEO with these files and it worked well, but my question is : is the geolocation accurate enough (over ocean) ?
Another associated question : when will the 5-mn attitude and ephemeris files be available again ?
Thank you !
Best regards,
Jacques

Filters:

OB ODPS - towens
Subject Matter Expert
Subject Matter Expert
Posts: 381
Joined: Fri Feb 05, 2021 9:17 am America/New_York
Answers: 0
Been thanked: 4 times

Re: Processing MODIS L1A to L2 with partial ephemeris available

by OB ODPS - towens » Wed Mar 01, 2023 4:33 pm America/New_York

Our source for the NRT attitude and ephemeris data has encountered a problem and is unable to produce the data.
We can only provide the definitive atteph which has a longer latency.
There no estimate as to when the NRT data will be back in production.

Tommy

OB ODPS - towens
Subject Matter Expert
Subject Matter Expert
Posts: 381
Joined: Fri Feb 05, 2021 9:17 am America/New_York
Answers: 0
Been thanked: 4 times

Re: Processing MODIS L1A to L2 with partial ephemeris available

by OB ODPS - towens » Thu Mar 02, 2023 9:21 am America/New_York

Our MODIS NRT data provider is back in production. The latest NRT files are downloading now and should be available shortly.

Tommy

Post Reply