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The Suomi National Polar-orbiting Partnership, or Suomi NPP, is a weather satellite operated by the United States National Oceanic and Atmospheric Administration.
Originally intended as a pathfinder for the NPOESS programme, which was to have replaced NOAA's Polar Operational Environmental Satellites and the US Air Force's Defense Meteorological Satellite Program, Suomi was launched in 2011 after the cancellation of NPOESS to serve as a gapfiller between the POES satellites and the Joint Polar Satellite System which will replace them. Its instruments provide climate measurements that continue prior observations by NASA's Earth Observing System.
it was previously known as the National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) and NPP-Bridge.
