Solid State Phased Array Radar System
 AN/FPS-132 UEWR
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The Solid State Phased Array Radar System (SSPARS, colloquially "BMEWS radar network'" as late as 2004) is a USAF radar, computer, and communications system for missile warning and space surveillance "at five (5) geographically separated units worldwide including Beale AFB, CA, Cape Cod, AFS, MA, Clear AFS, AK, RAF Fylingdales, UK, and Thule AB, Greenland." SSPARS completed replacement of the RCA 474L Ballistic Missile Early Warning System when the last SSPAR (phased array radar with 2500 "solid state transmitter" modules) was operational at Clear in 2001, the year SSPARS equipment included:
After the Fylingdales BMEWS radars had been replaced by Raytheon/Cossor AeroSpace and Control Data Corporation (embedded CDC-Cyber computer) at a cost of US $100M, in February 1995 the "missile warning center at Cheyenne Mountain AS [was] undergoing a $450 million upgrade program". The entire SSPARS became operational on January 31, 2001 when the "SSPARS Site" at Clear AFS (separate from the BMEWS site) had Initial Operational Capability. The Clear AN/FPS-120 was subsequently "upgraded to the AN/FPS-123 model" SSPA Radar, and the SSPARS was modified in the Early Warning Radar Service Life Extension Program The US approved sale of an AN/FPS-115 to Taiwan in 2000 and it was introduced in 2006.
The AN/FPS-132 Upgraded Early Warning Radar (UEWR) is a series of phased array radar systems used for long-range early warning and space surveillance, operating as part of the United State Missile Defence and Space Surveillance Network.
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