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ULA Launches Air Force’s Fourth SBIRS Missile-Warning Satellite

By Marc Selinger

Monday, January 29th, 2018

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The U.S. Air Force’s fourth Space Based Infrared System (SBIRS) geosynchronous Earth orbit (GEO-4) missile-warning satellite lifted off late Jan. 19 on a United Launch Alliance (ULA) Atlas 5 rocket from Cape Canaveral Air Force Station in Florida.Later that evening, SBIRS GEO-4 began responding to commands from operators with the 460th Space Wing at Buckley Air Force Base in Colorado, according to Lockheed Martin [LMT], which built the satellite in Sunnyvale, Calif.The spacecraft is expected to take about 10 days to reach its final location…

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