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Hi - It's been a while since I've done any SeaDAS processing, certainly not since the new authentication requirement has been operational.  I wasn't _that_ surprised when my attempt to update my ancillary data files failed with the following:bash-3.2$ ./getanc.py -s 1997267000000 -e...

Thanks - I thought I did the band selection in GUI correctly, but maybe not.  I'll give it another go.   I'll take it from here - maybe go back to my more familiar command line invocation of l2gen.  Have a good weekend.   Barry

I'm still not getting it.  Am I right that selecting aer_opt = -9 will get me the SWIR correction?  When I look at the saved parameter file I still get "OC" as the suite and don't see any additional bands.  I hate to trouble you with this.  I'll see if I can...

Hi Sean - Hmmm.   Interesting.  I was trying to reproduce a recently published (Yu et al., RSE 2019, 111491) algorithm for SPM that uses VIIRS Rrs_745 and Rrs_862.  In the paper, the authors mention using the combined NIR/SWIR atmospheric correction so I set that option to -9 in ...

Hi - I am trying to generate VIIRS L2 files using l2gen.  I'd like to add the NIR bands to the standard OC suite of products.  I've been testing the procedure using the GUI.  I can generate the default L2 file with no difficulty.  However, when I used the "Products&q...

Yeah - you'd think I've been doing this long enough to have realized that in the first place.:grin:  Forging ahead now.  Thanks again (as always).   Barry

OK - problem is solved.   It turns out that I made the incorrect assumption that the MODIS 555nm band would be the appropriate one to use for what the QAA algorithm uses as the reference wavelength for the cases when Rrs_667 < 0.0015.  In my (weak) defense, the index for the reference...

Hi Sean - Just to add to the record here, no joy, I'm afraid.  I did a complete MODIS reprocessing with seawater_opt=0 and the results are essentially the same.  I get excellent agreement between my code and SeaDAS for the cases when Rrs_667 >= 0.0015, but when Rrs_667 < 0.0015,  ...

Ah!  Thanks (again), Sean.  I'm sure that is the explanation.  I just wish I'd noticed it before I did my own reprocessing of the entire mission (my little laptop is getting tired).  Lesson learned - read and re-read the l2gen documentation.  At least I can stop sear...

Hi - I have converted the SeaDAS QAA code (qaa.c and get_qaa.c in l2gen msl12 9.5.0-V2019.3 (Aug 16 2019 13:00:37)) to run in R.  To be sure I got things right in the translation, I did the following experiment (based on MODIS data).  I generated a large set L2 files adding the products a_...