Search found 227 matches

by OB SeaDAS - knowles
Wed Oct 28, 2020 11:22 am America/New_York
Forum: Questions/Comments
Question: maskcloud
Replies: 2

maskcloud

Amita,Pixels can have NaN values for products for a multitude of reasons and NaN pixels can have a multitude of flags.  You can view all the flags for a pixel by hovering over it and observing all its flag values within the Pixel info tool window (... or by placing a pin on it and using this to...
by OB SeaDAS - knowles
Mon Oct 26, 2020 10:17 am America/New_York
Forum: Questions/Comments
Question: Resampling
Replies: 3

Resampling

You can use the Collocate tool with HICO as the reference/master and VIIRS as the dependent file.  This will generate a new file containing all the raster data bands from both input files.  The pixels of the generated file will geographically match those of the L2 HICO pixel.  Since a...
by OB SeaDAS - knowles
Wed Oct 21, 2020 10:22 am America/New_York
Forum: Questions/Comments
Question: Reprojecting L1 image
Replies: 1

Reprojecting L1 image

No, you cannot reproject L1 images and then run l2gen.  All the science processors within the OCSSW menu are strict science data processors with specific input file types and formats, tracking through specific science data levels.  The other more generic GUI/GPT tools such as Reproject, Su...
by OB SeaDAS - knowles
Mon Oct 19, 2020 9:34 am America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

You can apply the flag masks using the original unprojected flag by setting the following field within the Reproject operator:<maskExpression>${maskExpression}</maskExpression>The flags themselves should not be reprojected as they really have no meaning since they are tied to multiple unprojected pi...
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)....