The U.S. Air Force successfully launched a United Launch Alliance Delta IV-Medium rocket carrying the fifth Global Positioning System IIF satellite at 8:59 p.m. EST Feb. 20, from Space Launch Complex 37 here.
The GPS Block IIF satellites are built by Boeing, and are operated by the United States Air Force following their launch by United Launch Alliance, using Evolved Expendable Launch Vehicles.
The first GPS IIF satellite was launched on May 27, 2010, and entered service on Aug. 26, 2010.
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