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NOAA will discontinue all Suomi NPP (S-NPP) science data products on November 1, 2026, at 13:00 UTC (8:00 AM EST). Users should prepare now by transitioning operational workflows to NOAA-21 (Primary) and NOAA-20 (Secondary) products. Read the full NOAA notice or email spsd.userservices@noaa.gov with any questions.
SFR is the instantaneous liquid-equivalent snowfall rate. It is retrieved from measurements taken by passive microwave sensors aboard certain polar-orbiting satellites (Metop-B, Metop-C, SNPP, N20, N21, amd GPM).
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