Search found 68 matches
- 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 ...
- 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...
- 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
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
- Mon Dec 15, 2025 12:35 pm America/New_York
- Forum: Home
- Question: getanc produces incorrect doubled relative output path (eg. anc/anc/) when using -o with relative directories
- Replies: 1
Re: getanc produces incorrect doubled relative output path (eg. anc/anc/) when using -o with relative directories
Thanks for the report. We'll get a fix for this in an upcoming release.
Regards,
Sean
Regards,
Sean
- 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...
- 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...
- Tue Dec 09, 2025 4:24 pm America/New_York
- Forum: Home
- Question: MODIST Status
- Replies: 7
Re: MODIST Status
Andrew, I can't speak to issues with LANCE, but there shouldn't be an issue accessing MODIS Terra L1A data from the OB.DAAC. Can you provide the endpoint you're having issue with? BTW, plans are in flux about the decommissioning of the Terra, Aqua and Aura missions. So far, data are still being coll...
- Tue Sep 23, 2025 9:48 am America/New_York
- Forum: Home
- Question: MODIS Average quality level
- Replies: 8
Re: MODIS Average quality level
It has nothing to do with the "latband" coefficients. There is an explicitly defined geographic box where that test is applied: const float equatorialNorth = 30.0; // the ranges where SST diff tests are applied const float equatorialSouth = -10.0; const float equatorialWest = -105.0; const...
- Mon Sep 22, 2025 3:19 pm America/New_York
- Forum: Home
- Question: How to Correct Scan-Line Striping in SeaDAS Chlorophyll-a Product from Sentinel-2?
- Replies: 1
Re: How to Correct Scan-Line Striping in SeaDAS Chlorophyll-a Product from Sentinel-2?
l2gen has a filtering feature (defined by filter_opt and filter_file). There is a default filter file for MSI, but I don't think it is enabled by default (i.e. filter_opt=0 is set). You can try enabling it to see if that improves the result (filter_opt=1). You can also try modifying the filter_file ...
- Mon Sep 22, 2025 3:07 pm America/New_York
- Forum: Home
- Question: Rayleigh-corrected reflectance (Rrc(λ))
- Replies: 2
Re: Rayleigh-corrected reflectance (Rrc(λ))
To add to Minwei's response... rhos also accounts for gaseous absorption (in addition to simple Rayleigh scattering). It does not require "atmospheric correction" (really, aerosol correction...we're bad at being clear about what the parameters do), so you can set atmocor=0 to speed up the ...