Search found 72 matches

by OB.DAAC - SeanBailey
Tue Sep 08, 2026 1:43 pm America/New_York
Forum: Home
Question: OPeNDAP "Too Many Requests" Error (OBDAAC)
Replies: 1

Re: OPeNDAP "Too Many Requests" Error (OBDAAC)

The backend server was being cranky. It is in a better mood now :) Please try your requests again.

Regards,
Sean
by OB.DAAC - SeanBailey
Mon Aug 31, 2026 9:01 am America/New_York
Forum: Home
Question: Aqua MODIS LUT version differences from OceanData ancillary versus MYD021KM
Replies: 1

Re: Aqua MODIS LUT version differences from OceanData ancillary versus MYD021KM

The MODIS L1B LUTs maintained by the OBPG differ from the LUTs generated by MCST (as your user noted). Ocean color processing requires an on-orbit calibration accuracy that is not provided by the MCST LUTs. The OBPG versions use the MCST version as a source, but we adjust the coefficients for the oc...
by OB.DAAC - SeanBailey
Thu Aug 27, 2026 3:35 pm America/New_York
Forum: Home
Question: Issues Regarding OCSSW MODIS_GEO
Replies: 1

Re: Issues Regarding OCSSW MODIS_GEO

This issue was related a truncation of the utcpole.dat file. That file was corrected, so if you haven't already run update_luts, that should resolve this for you

Regards,
Sean
by OB.DAAC - SeanBailey
Wed Aug 26, 2026 12:15 pm America/New_York
Forum: Home
Question: How to Correctly Select an L2 Scenes to Generate an L3 Image?
Replies: 1

Re: How to Correctly Select an L2 Scenes to Generate an L3 Image?

What constitutes a "day" for the L3 binned products is not a 24hr period starting at midnight. We define the "data day" based on the equatorial node crossing time for our sun-synchronous polar orbiting satellites. For MODIS (at least before the orbit maintenance was stopped), tha...
by OB.DAAC - SeanBailey
Thu May 21, 2026 2:39 pm America/New_York
Forum: Home
Question: L3 Monthly Chl-a data issue at -180 to 180 degree longitudinal range
Replies: 3

Re: L3 Monthly Chl-a data issue at -180 to 180 degree longitudinal range

If you are referring to MODIS, yes, we are aware of the issue with the binning of recent data. It has to do with the selection of data that fall with in the "data day". The logic in place isn't handling the orbit drift properly. The code has been updated and once it is put into production ...
by OB.DAAC - SeanBailey
Mon Feb 23, 2026 11:27 am America/New_York
Forum: Home
Question: L2 coccolith flag?
Replies: 1

Re: L2 coccolith flag?

The coccolithophore flag is based on work from Chris Brown, and was originally described in Chapter 3 of Volume 28 of the SeaWiFS pre-launch technical memoranda series: The coefficients were updated in 2000 and was documented in Chapter 7 of Volume 9 of the SeaWiFS post-launch series They haven't ch...
by OB.DAAC - SeanBailey
Tue Jan 13, 2026 7:26 am America/New_York
Forum: Home
Question: mismatch in ntime
Replies: 3

Re: mismatch in ntime

Andrew,
You have a typo in the wget call. It is not manafest, but manifest.
Try: wget https://oceandata.sci.gsfc.nasa.gov/manifest/install_ocssw

Sean
by OB.DAAC - SeanBailey
Tue Dec 09, 2025 4:37 pm America/New_York
Forum: Home
Question: MODIS reprocessing plan
Replies: 1

Re: MODIS reprocessing plan

The next planned reprocessing for MODIS Aqua ocean color data will not take place until the mission has reached its end. NASA budgets and priorities are still not finalized, so I cannot provide a reliable estimate as to when that reprocessing will be accomplished. That said, I can say that changes i...
by OB.DAAC - SeanBailey
Tue Dec 09, 2025 4:28 pm America/New_York
Forum: Home
Question: Questions regarding l2_flag OPSHAL
Replies: 1

Re: Questions regarding l2_flag OPSHAL

The optically shallow flag (OPSHAL) is actively being populated in the current version of the code. Here is what is output in the current L2 files: int l2_flags(number_of_lines, pixels_per_line) ; l2_flags:long_name = "Level-2 Processing Flags" ; l2_flags:coordinates = "longitude lati...