Search found 1353 matches

by OB.DAAC - SeanBailey
Thu Nov 03, 2022 8:21 am America/New_York
Forum: Questions/Comments
Question: SeaDAS atmospheric correction algorithms
Replies: 6

Re: SeaDAS atmospheric correction algorithms

Matt,
The "sd" refers to the "size distribution number". The smaller the number, greater the fine mode aerosol contribution.

Sean
by OB.DAAC - SeanBailey
Wed Nov 02, 2022 3:24 pm America/New_York
Forum: Questions/Comments
Question: Forward stream of L2 OC SNPP/VIIRS and NOAA20/VIIRS
Replies: 3

Re: Forward stream of L2 OC SNPP/VIIRS and NOAA20/VIIRS

Yes, we do plan to produce the refined product, however we are waiting for the November lunar calibration maneuver before finalizing the calibration assessment. With R2022, we are following the same cadence with refined calibration that we use for the MODIS instruments.

Regards,
Sean
by OB.DAAC - SeanBailey
Wed Nov 02, 2022 3:13 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS atmospheric correction algorithms
Replies: 6

Re: SeaDAS atmospheric correction algorithms

In the l2gen STDOUT output, the "alpha" *is* the angstrom exponent for the model....the product 'alpha' is the polarization angle as Minwei described. The reference for the aerosol models would be: Ahmad, Z., Franz, B. A., McClain,C. R., Kwiatkowska, E. J., Werdell, P. J., Shettle, E.P., &...
by OB.DAAC - SeanBailey
Mon Oct 31, 2022 4:25 pm America/New_York
Forum: Questions/Comments
Question: SNPP VIIRS L2 SST images are not available
Replies: 4

Re: SNPP VIIRS L2 SST images are not available

Fernando,
This is an unintended consequence of the renaming of the VIIRS L1 files with the recent R2022 reprocessing. We are working to correct the problem.

Sean
by OB.DAAC - SeanBailey
Mon Oct 31, 2022 3:59 pm America/New_York
Forum: Questions/Comments
Question: Find swaths in L1/L2 browser
Replies: 1

Re: Find swaths in L1/L2 browser

The current L1/2 browser uses a quadsphere grid with a resolution of 72km, thus the minimum radius. Your search results will not be negatively impacted, although there is a slight possibility that some scenes close to your region of interest but not covering it would be retrieved....but only a very ...
by OB.DAAC - SeanBailey
Mon Oct 31, 2022 3:49 pm America/New_York
Forum: Questions/Comments
Question: Removing high chlor_a before binning
Replies: 4

Re: Removing high chlor_a before binning

Andrea, The answer is more a 'not yet'. The binner does do something akin to what you seek, but it's very inflexible. There is a way to set a minimum at run time. The default minimum is zero, but some products are valid with negative values, so we have a way to allow the binner to accept values less...
by OB.DAAC - SeanBailey
Fri Oct 28, 2022 1:55 pm America/New_York
Forum: Questions/Comments
Question: Seadas aerindex
Replies: 2

Re: Seadas aerindex

Matt, With the original Gordon and Wang implementation with 12 aerosol models, it was pretty easy...just ask for: aer_model_min aer_model_max aer_model_ratio aer_model_min and max are the bounding models that encompassed measured epsilon value, ratio is the weighting between them. Then we went to 80...
by OB.DAAC - SeanBailey
Tue Oct 25, 2022 10:41 am America/New_York
Forum: Questions/Comments
Question: VIIRS data processed problem
Replies: 4

Re: VIIRS data processed problem

If you run the update_luts script, the polar wander file (as well as other required LUTs) will be retrieved and put in the correct location:

Code: Select all

$ update_luts viirsn
Sean
by OB.DAAC - SeanBailey
Tue Oct 25, 2022 10:06 am America/New_York
Forum: Questions/Comments
Question: VIIRS data processed problem
Replies: 4

Re: VIIRS data processed problem

Have you verified that your polar wander file exits and is up to date (i.e. have you recently run update_luts)?
It should be under $OCVARROOT/common/polar_wander.ascii

Sean