Search found 243 matches

by OB SeaDAS - knowles
Mon Oct 05, 2020 10:10 am America/New_York
Forum: Questions/Comments
Question: Problem with importing contour lines shapefiles from seadas in arcgis
Replies: 2

Problem with importing contour lines shapefiles from seadas in arcgis

I've never used Arcgis, but the shapefile export tool should work fine in SeaDAS for contours.  You can test this by creating contours in SeaDAS, exporting the contours from within the File Info window (right click on Vector and select "Export Geometry as Shapefile").  Then o...
by OB SeaDAS - knowles
Thu Sep 17, 2020 9:53 am America/New_York
Forum: Questions/Comments
Question: Cloud Masking
Replies: 3

Cloud Masking

Hi Amita,I'm answering in regards to how you would do cloud masking on a rhos_865 band with other SeaDAS GUI tools instead of cloud masking with l2gen. In the Mask Manager tool window click on "f(x)" icon.  Click "Show bands".  At this point you can click and create...
by OB SeaDAS - knowles
Thu Aug 27, 2020 10:05 am America/New_York
Forum: Questions/Comments
Question: OLI L2 data
Replies: 6

OLI L2 data

If you are a loading a level-2 file into SeaDAS the Mask Manager panel shouldn't be blank.  Make sure your file is being loaded correctly and being recognized as a level-2 file.  To determine which "Product reader" SeaDAS is actually using on your file, go to File Manager, cl...
by OB SeaDAS - knowles
Fri Aug 21, 2020 10:21 am America/New_York
Forum: Questions/Comments
Question: L2gen processing speed
Replies: 8

L2gen processing speed

The MODIS instruments only contain 2 bands at 250m (645nm and 859nm).  These are not blue/green or IR bands so it rules out the SST and chlor_a algorithms.  You do have options regarding fine tuning atmospheric correction.  You can use l2gen to process the 645 and 859 band products to...
by OB SeaDAS - knowles
Mon Jul 27, 2020 2:16 pm America/New_York
Forum: Questions/Comments
Question: Change cloud maks for 250m products
Replies: 1

Change cloud maks for 250m products

Yes you can improve the resolution of the level2 flag mask "CLDICE", depending of course on which sensor mission you are using.  I'm guessing that you are referring to MODIS which contains 250m, 500m, 1000m bands and can be processed by SeaDAS at any of these resolutions.  Th...
by OB SeaDAS - knowles
Wed Jul 22, 2020 5:23 pm America/New_York
Forum: Questions/Comments
Question: No L3 MODIS Aqua RRS Data For Southern New Zealand in June
Replies: 3

No L3 MODIS Aqua RRS Data For Southern New Zealand in June

Very likely, yes you can find data there in June at higher resolutions.  I just used the L2 browser https://oceancolor.gsfc.nasa.gov/cgi/browse.pl and did a quick visual scan of the true color (TC) images and found many files for June 2020 matching your region (most of them cloudy but not all)....
by OB SeaDAS - knowles
Thu Jul 09, 2020 3:37 pm America/New_York
Forum: Questions/Comments
Question: Selecting bands from different files for scatter plot?
Replies: 5

Selecting bands from different files for scatter plot?

Barry, this case study video tutorial illustrates the use of the Collocation Tool in comparing files and using statistics.
https://www.youtube.com/watch?v=5dIwCK7IDXE

More videos can be found here:
https://seadas.gsfc.nasa.gov/tutorials/video_tutorials/

Danny
by OB SeaDAS - knowles
Thu Jul 09, 2020 3:09 pm America/New_York
Forum: Questions/Comments
Question: Selecting bands from different files for scatter plot?
Replies: 5

Selecting bands from different files for scatter plot?

Oftentimes with SeaDAS there are 2 or more ways of doing something.  Another approach would be to use the Collocation Tool.  This tool will create a new file which contains all the bands of your 2 source files.  If the source files contain differing projections then this tool will sti...
by OB SeaDAS - knowles
Tue Jun 02, 2020 4:13 pm America/New_York
Forum: Questions/Comments
Question: Cropping .L3m Images Through Command Line
Replies: 1

Cropping .L3m Images Through Command Line

Since your input file is a mapped file then with SeaDAS the best option for geographically cropping a file at the command line would be to use the gpt Subset operator.  See the GPT Cookbook within the SeaDAS 7.5.x GUI (Menu > Help > Cookbooks > GPT Cookbook).  Go to the section on the &quo...
by OB SeaDAS - knowles
Fri May 22, 2020 3:07 pm America/New_York
Forum: Questions/Comments
Question: l2gen products
Replies: 45

l2gen products

As a note since SeaDAS 7 has a platform dependent gpt executable filename, I'm using "gpt" as an alias for convenience:

For example I have on my mac in the file ~/.profile:
export SEADASROOT=/Users/seadas/SeaDAS_Installations/seadas-7.5.3
alias gpt=$SEADASROOT/bin/gpt.command

Danny