Search found 257 matches

by OB SeaDAS - dshea
Fri Apr 26, 2019 10:03 am America/New_York
Forum: Home
Question: l2gen in batch environment
Replies: 4

l2gen in batch environment

make sure your "ofile" is being written into a directory that has enough space.  Sometimes /tmp is pretty small.

don
by OB SeaDAS - dshea
Thu Apr 25, 2019 10:58 am America/New_York
Forum: Home
Question: Which l2gen routine computes the total backscatter coefficient (b) from IOP values?
Replies: 2

Which l2gen routine computes the total backscatter coefficient (b) from IOP values?

I found this in ocssw-src/src/l2gen/get_qaa.c:310

b = bb * 53.56857 + 0.00765;

don
by OB SeaDAS - dshea
Thu Apr 11, 2019 12:00 pm America/New_York
Forum: Home
Question: Sentinel 3 OLCI processing
Replies: 1

Sentinel 3 OLCI processing

The current version of SeaDAS can process OLCI S3A and S3B data.  The SeaDAS GUI can not display the L1B files.  You will have to wait for SeaDAS 8 for that.  l2gen in the GUI or the command line can process OLCI data to L2, so you can get any L2 product.SeaDAS has documentation and v...
by OB SeaDAS - dshea
Thu Apr 04, 2019 9:10 am America/New_York
Forum: Home
Question: l2gen and landsat8 collection 1 data
Replies: 2

l2gen and landsat8 collection 1 data

SeaDAS 7.5.x can handle Landsat 8 (OLI) Collection 1 data.  I just processed a collection 1 file using the GUI.

If you put the L1 file somewhere where I can grab it, I will see what I can do.

don
by OB SeaDAS - dshea
Wed Apr 03, 2019 9:02 am America/New_York
Forum: Home
Question: viirs l2 processing
Replies: 2

viirs l2 processing

Looks like the Polar Wander file is in the VIIRS NPP data directory.  Installing VIIRS NPP from the GUI or

install_ocssw.py --viirsn

or maybe this will work (which is less data)

update_luts.py viirsn

on the command line.  We will fix this oversight.

don
by OB SeaDAS - dshea
Thu Mar 28, 2019 8:58 am America/New_York
Forum: Home
Question: A20022132002243.MON.chlor_a.map.nc
Replies: 1

A20022132002243.MON.chlor_a.map.nc

This is the nice thing about NetCDF files.  The file tells you all you need to know about the stored data.  There are many ways to get the metadata from the file.  On the command line type this:ncdump -h <fileName>For example the chlor_a array is a 32 bit float with dimensions y=32, x...
by OB SeaDAS - dshea
Wed Mar 06, 2019 11:05 am America/New_York
Forum: Home
Question: virus installation issues lots seadas 7.5
Replies: 16

virus installation issues lots seadas 7.5

That is normal (though ugly).  This the the bowtie deletion feature, where VIIRS saves bandwith by not sending down the overlapping pixels on the edges of the scan.

don
by OB SeaDAS - dshea
Wed Mar 06, 2019 10:58 am America/New_York
Forum: Home
Question: virus installation issues lots seadas 7.5
Replies: 16

virus installation issues lots seadas 7.5

did you also make and pass in the geolocation file?  This is needed for l2gen processing of VIIRS

What is the command line you used?
by OB SeaDAS - dshea
Wed Dec 19, 2018 3:16 pm America/New_York
Forum: Home
Question: Rayleigh correction
Replies: 8

Rayleigh correction

need to set "l2prod=rhos_nnn" not product.

run l2gen on the command line without any options to get a list of the options available.
by OB SeaDAS - dshea
Thu Dec 06, 2018 10:05 am America/New_York
Forum: Home
Question: Can the ocssw source code of C be obtained?
Replies: 2

Can the ocssw source code of C be obtained?

The source code is also viewable online:

https://oceancolor.gsfc.nasa.gov/docs/ocssw/files.html

don