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Global snow cover is mapped at a 375-meter resolution using radiance data from the VIIRS instrument on the NOAA-20 (JPSS-1) satellite. The dataset identifies snow using the Normalized Difference Snow Index (NDSI) with quality control screens and is processed in a near real-time (NRT) stream. Data is provided in NetCDF format as 6-minute Level 2 swaths.
Data is provided in NetCDF format, which requires specific software or libraries to read. License is listed as 'other-license-specified'; users should consult the official NASA source for terms.