Search found 250 matches

by OB SeaDAS - knowles
Tue Aug 16, 2022 2:04 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS Spectrum View
Replies: 3

Re: SeaDAS Spectrum View

I don't believe the problem you are experiencing is associated with any difference between SeaDAS 8.2.0 and the prior SeaDAS 7 versions. The problem with your last plot is likely that you don't have your bands grouped together into folders in the File Manager. See the two attached images. The bands ...
by OB SeaDAS - knowles
Tue Aug 16, 2022 11:41 am America/New_York
Forum: Questions/Comments
Question: Reprojection
Replies: 4

Re: Reprojection

Here's a help page showing the algorithm methodology used in SeaDAS for reprojection

https://seadas.gsfc.nasa.gov/help-8.2.0/general/overview/ResamplingMethods.html
by OB SeaDAS - knowles
Thu Aug 04, 2022 12:05 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS Spectrum View
Replies: 3

Re: SeaDAS Spectrum View

I think what you are asking about is the location of the Spectrum View tool. For SeaDAS this tool is located in the Analysis toolbar, or can be found in Menu > Optical > Spectrum View. Another way to find a tool is to type the tool name in the search field at the top right of SeaDAS 8 For any file w...
by OB SeaDAS - knowles
Mon Aug 01, 2022 2:25 pm America/New_York
Forum: Questions/Comments
Question: Seadas GEO.hdf
Replies: 8

Re: Seadas GEO.hdf

For the answer to your first question: Your csv file used to import the lat/lon values into the Pixel Extraction Tool needs to be a very precisely formatted text file. For example your csv file could be as follows (where "\t" denotes a tab character, and there are no other hidden character...
by OB SeaDAS - knowles
Thu Jul 07, 2022 11:59 am America/New_York
Forum: Questions/Comments
Question: SeaDAS MODIS Cloud Mask
Replies: 3

Re: SeaDAS MODIS Cloud Mask

The files you mention are not NASA OBPG files, but the following approach should be somewhat similar on your files. Using NASA OBPG files, a way to transfer the cloud mask from a L2 file into a L1B scene (of the same scene, same instrument, and same resolution) would be to open both the L2 file and ...
by OB SeaDAS - knowles
Wed Jun 29, 2022 2:34 pm America/New_York
Forum: Questions/Comments
Question: Project Terra MODIS L1B Swath to L3 500m Sin Grid
Replies: 4

Re: Project Terra MODIS L1B Swath to L3 500m Sin Grid

You can use the SeaDAS software to reproject NASA OBPG MODIS L1B files to the projection of a mapped image file. Use the SeaDAS Reproject Tool with the MODIS L1B file as the input (source) file and choose "Use CRS of" to specify the mapped file which contains your desired (coordinate refer...
by OB SeaDAS - knowles
Wed Jun 29, 2022 2:17 pm America/New_York
Forum: Questions/Comments
Question: process derived products with SeaDAS
Replies: 4

Re: process derived products with SeaDAS

You can process any SeaDAS Level-2 file to a mapped SMI image file using l2bin followed by l3mapgen.

Input: L2 file > program: l2bin > Output: L3 bin file
Input:L3 bin file > program: l3mapgen > Output: L3 mapped file
by OB SeaDAS - knowles
Tue May 24, 2022 4:49 pm America/New_York
Forum: Questions/Comments
Question: Selecting reflectance math band
Replies: 2

Re: Selecting reflectance math band

The BandMath expression to replicate the Chl GlobColour equation 6 of the paper you reference would be: First create band named R: if (log10(Rrs_443/Rrs_555) > log10(Rrs_490/Rrs_555) and log10(Rrs_443/Rrs_555) > log10(Rrs_510/Rrs_555)) then log10(Rrs_443/Rrs_555) else ( if (log10(Rrs_490/Rrs_555) > ...
by OB SeaDAS - knowles
Tue May 24, 2022 2:40 pm America/New_York
Forum: Questions/Comments
Question: Output setting of batch processing changes
Replies: 5

Re: Output setting of batch processing changes

The bad news here is that I can confirm when I load into either the GUI Graph Builder or the GUI Batch Processing an xml file for the Reproject operator containing the fields of the Reproject "Output Parameters", these particular parameters are NOT loaded in, and the defaults are used. We ...
by OB SeaDAS - knowles
Tue May 24, 2022 2:11 pm America/New_York
Forum: Questions/Comments
Question: I wonder the meaning of reference pixel
Replies: 7

Re: I wonder the meaning of reference pixel

The default settings of the Reproject Tool are fine if you wish to reproject the source scene while retaining it's original boundaries and resolution. However, if you wish to have the Reproject Tool crop your scene into a specified region and/or adjust the resolution, then modifying the "Output...