Pulling Statistical Data from Many L3 mapped Files in SeaDAS

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eric.r.enloe
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Pulling Statistical Data from Many L3 mapped Files in SeaDAS

by eric.r.enloe » Thu Oct 26, 2023 9:50 am America/New_York

Does SeaDAS have the ability to pull pixel data for RRS from several files and then run statistics over the several files? For example, I would like to go though a year of day L3 mapped data files and use each pixel of data from each day to find the mean and standard deviation for each RRS wavelength.

Also, for the year data file, what does each pixel of RRS data represent? Is it the average of each RRS value over the whole period of data collection of that individual pixel?

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OB SeaDAS - xuanyang02
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Re: Pulling Statistical Data from Many L3 mapped Files in SeaDAS

by OB SeaDAS - xuanyang02 » Thu Oct 26, 2023 12:58 pm America/New_York

You can try SeaDAS' BandMaths Tool to create new bands using avg() and/or stddev() functions.
https://seadas.gsfc.nasa.gov/help-8.4.0/desktop/BandMaths.html

The expression editor for avg() looks like this
Screenshot 2023-10-26 at 12.52.50 PM.png
Screenshot 2023-10-26 at 12.52.50 PM.png (143.29 KiB) Not viewed yet
If you want to do BandMaths on many files, you can try gpt tool --
https://seadas.gsfc.nasa.gov/help-8.4.0/GptCookbook/gptCookbookBandMaths.html


Here is the documentation on level-3 binned data products -- https://oceancolor.gsfc.nasa.gov/resources/docs/technical/ocean_level-3_binned_data_products.pdf

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