Seadas аtmospheric correction on land

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grogse
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Seadas аtmospheric correction on land

by grogse » Sun May 22, 2022 3:44 am America/New_York

What is the algorithm SeaDAS uses for atmospheric correction on land for the Aqua/MODIS satellite. In order to calculate the NDVI.

I would be very glad if there is an official document or article on this topic

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OB.DAAC - amscott
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Re: Seadas аtmospheric correction on land

by OB.DAAC - amscott » Mon May 23, 2022 12:11 pm America/New_York


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Re: Seadas аtmospheric correction on land

by OB.DAAC - SeanBailey » Mon May 23, 2022 12:28 pm America/New_York

The NDVI product is computed from Rayleigh corrected reflectance. Over land, l2gen computes the Rayleigh contribution following the work of Jacques Descloitres (briefly described in Gumley, Descloitres, and Schmaltz. 2003. "Creating reprojected true color MODIS images: A tutorial." University of Wisconsin–Madison).

Any reasonable Rayleigh approximation would do to create the "surface reflectance" values (in this sense 'surface' is land+aerosol).

Sean

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