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One difference I see in the L2 from V2026.0 is that the latitude and longitude bands contains no data values whereas the L2 from V2025.5 do not.

I do not seeing any obvious problems with the L2 files when viewing in SeaDAS. The missing chunks show up after reprojecting.

Thanks for the response. I posted on the SeaDAS forum because the reprojected results differ depending on the l2gen version. The reprojected product generated from a L2 file created with l2gen (msl12 9.11.0-V2025.5) is fine. The reprojected product generated from a L2 file created with l2gen (msl12 ...

Hi, I installed the latest OCSSW tag (v2026.0) on a linux VM with RHEL8. Reprojecting an OLCI L2 file created by l2gen using the SNAP (v12.0.1) "gpt Reproject" operator gives bad results. Output from same sequence of commands with tag v2025.5 are as expected. Also, direct "gpt Reproje...

Thanks for the update. I implemented the following change in the nccopy_var function in netcdf_utils.py to set chunking when creating the output variable that fixed the problem for me: # create variable with same name, dimnames, storage format zlib = srcvar.filters().get('zlib', False) shuffle = src...

The problem seems to be related to different values being assigned to ChunkSizes in the l1bextract_safe_nc output netCDF files. Using nccopy to recreated radiance files with updated ChunkSizes gave much better l2gen performance. I see there's a "TODO: get and set chunksizes" comment in the...

The time for l2gen to process an OLCI granule subset using l1bextract_safe_nc takes significantly longer than processing the full granule (l2gen version msl12 9.6.0-V2023.3 (Oct 4 2023 22:27:24)). I tested on both RHEL8.9 and Ubuntu 22.04 with similar results. The following example demonstrates the ...

Thanks Sean. I will follow up with ESA.

Andrew

Hi, The OCSSW program lonlat2pixline gives incorrect pixel/line values for some MERIS L1B input files. I used lonlat2pixline to first get the pixel/line values for a bounding box covering Lake Erie and then used the output to subset the MERIS L1B file to what should be Lake Erie. lonlat2pixline /dat...

The modis_L1A script is no longer recognizing the --output option.

I'm running the T2022.7 version

Andrew