Search found 202 matches

by OB SeaDAS - xuanyang02
Wed Dec 22, 2021 10:36 am America/New_York
Forum: Questions/Comments
Question: L2gen fail with exit code 1
Replies: 13

Re: L2gen fail with exit code 1

From your new printout of SeaDAS/System Info -- NASA Science Processing (OCSSW): Environment {$OCSSWROOT}: /home/user Environment {$OCDATAROOT}: /home/user/share Do you have two copies of ocssw? one in /home/user, the other in /home/user/ocssw? Can you do ls -al /home/user/ ls -al /home/user/ocssw a...
by OB SeaDAS - xuanyang02
Tue Dec 21, 2021 10:00 am America/New_York
Forum: Questions/Comments
Question: L2gen fail with exit code 1
Replies: 13

Re: L2gen fail with exit code 1

From your SeaDAS/System Info printout, ... Application Version: SeaDAS 8.0.0 (Beta) ... l2gen version: msl12 9.5.1-V2021.2 (Jun 18 2021 11:22:53) ... it seems that you didn't restart SeaDAS after the updating and that you have OCSSW V2021.2 installed. Please quit SeaDAS and restart it. After that, t...
by OB SeaDAS - xuanyang02
Mon Dec 20, 2021 12:12 pm America/New_York
Forum: Questions/Comments
Question: L2gen fail with exit code 1
Replies: 13

Re: L2gen fail with exit code 1

I tested l2gen (V2021.2) on A2013067094500.L1B_LAC, and it seems to work fine.

What version of SeaDAS and what tag of OCSSW were you using when everything worked fine?

What did you do when you "updated SeaDAS"?
by OB SeaDAS - xuanyang02
Fri Dec 17, 2021 5:38 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS, LUTs
Replies: 6

Re: SeaDAS, LUTs

LUTs files on our site -- https://oceandata.sci.gsfc.nasa.gov/Ancillary/LUTs/

LUTs files in the SeaDAS/ocssw code -- $OCSSWROOT/var

Not sure if these are what you are looking for
by OB SeaDAS - xuanyang02
Wed Dec 15, 2021 11:52 am America/New_York
Forum: Questions/Comments
Question: How to get the rhos_478 in Seadas?
Replies: 2

Re: How to get the rhos_478 in Seadas?

It’s a calibration issue. We don’t have gains for L7 (so unity values are used). As a result, this scene has negative rhos. We do not provide the calibration adjustments that would be necessary to get valid retrievals, but you can see if this paper helps: https://doi.org/10.3390/rs10091337 Attached ...
by OB SeaDAS - xuanyang02
Mon Dec 13, 2021 10:03 am America/New_York
Forum: Questions/Comments
Question: How do I define the area of interest scope and set the resolution of the output
Replies: 1

Re: How do I define the area of interest scope and set the resolution of the output

Are you trying to do l2gen on Sentinel 2 data?

With l2gen, you can define the area of interest in the processing tab, but I don't think you can set resolution for data other than modis.
https://seadas.gsfc.nasa.gov/help-8.0.0 ... L2gen.html
by OB SeaDAS - xuanyang02
Fri Dec 10, 2021 10:29 am America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

Here is direct access to MODIS AQUA Data --https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/ or you can use the Level 1& 2 Browser -- https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=amod If you are not familiar with SeaDAS or NASA OB.DACC, here is an intro -- https://seadas.gsfc.na...
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 4:12 pm America/New_York
Forum: Questions/Comments
Question: Error processing from MODIS L1 to L2 in SEADAS
Replies: 1

Re: Error processing from MODIS L1 to L2 in SEADAS

In SeaDAS 7, modis_GEO.py and getanc.py are in $OCSSWROOT/scripts, and anc_utils.py is in $OCSSWROOT/scripts/modules. In SeaDAS 8, modis_GEO and getanc are in $OCSSWROOT/bin, anc_utils.py is in $OCSSWROOT/bin/seadasutils. It seems to me you are running modis_GEO.py in SeaDAS 7 on command line. I won...
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 1:11 pm America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

In SeaDAS l2gen GUI, click Processing Option tab, you can toggle "atmocor" on -- https://seadas.gsfc.nasa.gov/help-8.1.0 ... PTIONS_TAB

Here is more regarding aer_opt: https://oceancolor.gsfc.nasa.gov/forum/ ... l?tid=7026
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 11:04 am America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

Chlor_a is available in L2 data - https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/L2/ You can also use SeaDAS to process MODIS AQUA L1A data to L2: modis_GEO: L1A -> geo https://seadas.gsfc.nasa.gov/help-8.1.0/processors/ProcessModis_GEO.html ModiS_L1B: L1A + geo - > L1B https://seadas.g...