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l2gen on VIIRS takes L1(L1A or L1B) + GEO. You can download VIIRS L1A and VIIRS GEO from https://oceandata.sci.gsfc.nasa.gov (/VIIRS-JPSS1/L1/) geolocate_viirs takes VIIRS L1A and creates VIIRS GEO https://seadas.gsfc.nasa.gov/help-8.1.0/processors/ProcessGeolocate_viirs.html calibrate_viirs takes V...

The link you used to install OCSSW is for SeaDAS 7. https://oceandata.sci.gsfc.nasa.gov/ocssw/

Please follow the instruction under "Manual Installation" on this page to install OCSSW for SeaDAS 8.1.0: https://seadas.gsfc.nasa.gov/downloads/

You could try increasing your virtual memory available to SeaDAS 8.1.0 by
changing the -Xmx option in the <seadas-install-dir>/etc/seadas.conf file (in the line that begins with 'default_options'). Currently it is 4096M. Try 8196M or 16392M.

You are right that current OCSSW l2gen processes full granules regardless of boundary constraints. It's fixed and will be released for the next OCSSW tag.

You encountered "ModuleNotFoundError: No module named 'requests'" error when you tried to install hawkeye processor. Were you able to install Hawkeye processor?

After that, you also need to do "SeaDAS-OCSSW -> geolocate_hawkeye", before you do l2gen.

Amita,

Please attach the log files here as gnwiii suggested, so we can help you further. Thanks,

Bing

Amita,

It looks like modis_GEO is not happy with A2021118173500.L1A_LAC.x.hdf, can you change the file name to A2021118173500.L1A_LAC and do modis_GEO on it?

Here is a past post for your reference: https://oceancolor.gsfc.nasa.gov/forum/ ... l?tid=7736

Thanks,

Bing

Yes, you need Python requests package v2.18.0 or later as pointed out by "Ensure that the requirements are satisfied" on the downloads page: https://seadas.gsfc.nasa.gov/downloads/ Here is more about the python requests package: [https:]//docs.python-requests.org/en/master/ You can try pyt...

Yes, you need to install Hawkeye processor for l2gen to process Hawkeye data. Follow "Install with GUI" instruction on the downloads page: https://seadas.gsfc.nasa.gov/downloads/ and make sure you check the box beneath hawkeye. Here's the help page for install_ocssw: https://seadas.gsfc.na...

You need to tell us more. Can you take a screenshot of your l2gen GUI window and post it here?

To help us diagnose, can you also do "SeaDAS-OCSSW -> SeaDAS/System Info" and post the output here?

Thanks,

Bing