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You can browse and download level 2 files (OC) that contain chlor_a here, you can limit your region to Persian Gulf -- https://oceancolor.gsfc.nasa.gov/cgi/browse.pl You can download level 3 binned or mapped files that contain chlor_a here -- https://oceandata.sci.gsfc.nasa.gov/directdataaccess/ You...

Do you also see 'Failed to load module "canberra-gtk-module"' somewhere in your error message? If so, please see if this post is helpful viewtopic.php?p=11069

Since your OCSSWROOT is /home/alsahli/SeaDAS/ocssw

You should do to install msis2a

Here is the fix for the issue of "Percent valid data (0.00) is less than threshold". Please download https://oceandata.sci.gsfc.nasa.gov/ocssw/de200.eos and replace /home/o-mc/SeaDAS7.5/ocssw/share/modis/static/de200.eos with it. You should be able to run modis_GEO.py then.

Thanks for sharing the output of seadas_info.

What about ?

Can you do seadas_info ls /home/alsahli/SeaDAS/ocssw/share/msi and share the result here? You can add aer_opt=-10 (for Multi-scattering with MUMM correction and MUMM NIR calculation) and iop_opt=3 (for QAA) to l2gen's arguments If you need IOP suite, you might also want to add suite=IOP See the comm...

Here is the help for l2gen https://seadas.gsfc.nasa.gov/help-8.2.0/processors/ProcessL2gen.html On the command line, you can do l2gen ifile=/Users/*/Scenes/MSI_S2A/run/S2A_MSIL1C_20170525T112121_N0205_R037_T30UUB_20170525T112434.SAFE/manifest.safe ofile=/Users/*/Scenes/MSI_S2A/run/S2A_MSI.20170525T1...

I tried modis_GEO.py (SeaDAS-7.5.3) on A2022214094500.L1A_LAC. It did get att/eph files, but failed at the last minute -- $ modis_GEO.py A2022214094500.L1A_LAC Running debug binaries... /Applications/seadas-7.5.3/ocssw/bin Running debug binaries... /Applications/seadas-7.5.3/ocssw/bin MODIS GEO vers...

modis_atteph should work now -- $ modis_atteph --disable-download -m aqua -s 2022210120001 Running debug binaries... /Users/*/ocssw/bin ancillary_data.db att1=/Users/*/ocssw/var/anc/2022/210/PM1ATTNR.P2022210.1000.003 att2=/Users/*/ocssw/var/anc/2022/210/PM1ATTNR.P2022210.1200.003 eph1=/Users/*/ocss...

Thanks for reporting the issue yesterday. For some reason, the OZONE files were not available. We have made the change so getanc (V2022.0) for modis is now returning MERRA2 data. Now modis_atteph should work too. $ getanc --disable-download -m aqua -s 2022214200001 Running debug binaries... /Users/&...