by SMC Public Affairs
1/22/2014 - LOS ANGELES AIR FORCE BASE, El Segundo, Calif. -- Since
October 2012, U.S. Air Force Space Command's Space and Missile Systems
Center (SMC) has been analyzing, characterizing, testing and
implementing modified battery charge control rates across the GPS
IIR/IIR-M fleet. This fleet of 19 satellites comprises more than half of
the Global Positioning System (GPS) constellation. As of Nov. 15, 2013,
the USAF's 2nd Space Operations Squadron (2SOPS) completed the
modification, which will extend the life of these satellites'
operational capability.
Batteries are projected to be the primary life-limiting component when
GPS IIR/IIR-M vehicles are past their design life. Analysis by SMC, The
Aerospace Corporation and Lockheed Martin indicated that reducing the
charge rates during solstice season would add an average of one to two
years of life per space vehicle. SMC GPS directorate and 2SOPS will
closely monitor the real-world results of this project to ensure they
are in line with the expected gains. In total, it is anticipated that
the modification will add more than 27 years of cumulative life across
the GPS IIR/IIR-M fleet.
The Air Force Space Command's Space and Missile Systems Center, located
at Los Angeles Air Force Base, Calif., is the U.S. Air Force's center of
acquisition excellence for acquiring and developing military space
systems. Its portfolio includes GPS, military satellite communications,
defense meteorological satellites, space launch and range systems,
satellite control networks, space based infrared systems and space
situational awareness capabilities.
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