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parameter values

Posted: Mon Nov 07, 2022 4:32 am America/New_York
by mikejie
hello everyone! I have been testing the MOD10A1 data product recently, and found that according to the official indicators( )The result diagram is inconsistent with the actual situation. For example, the official NDSI snow coverage index is 0-100, but according to my practice, 0 is land and 11-100 is snow. Can you give us your guidance and suggestions?
Thank you.

Re: parameter values

Posted: Mon Nov 14, 2022 1:02 pm America/New_York
by NSIDC - greckase
Thank you for reaching out. NDSI_Snow_Cover is the the snow cover map with cloud and other masks overlaid. The NDSI value is scaled to the 0 - 100 range and was converted to byte from float datatype. All NDSI <= 0 are set to 0. Any pixel failing one or more of the data screens is set to 0 or other non-snow value. Values ranging from 0-100 represent a confidence that there is snow in that pixel.