The Defense Weather Satellite System (DWSS) [1] was a United States Department of Defense weather satellite system to have been built by Northrop Grumman Corporation [2] projected for launch in 2018. [3] In January 2012, the US Air Force cancelled the program. [4] It was replaced with the Weather System Follow-on Microwave (WSF-M). [5]
DWSS was a follow-on for the Defense Meteorological Satellite Program (DMSP) mission. The DWSS, together with the still continuing Joint Polar Satellite System (JPSS) project, was to replace the National Polar-orbiting Operational Environmental Satellite System (NPOESS) project which itself was cancelled in January 2010. [6]