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United Launch Alliance Marks the 50th Successful GPS Launch for the Air Force With the Delivery of the GPS IIF-2 Mission to Orbit

July 16, 2011 2:41 a.m. EDT

Jim Sponnick

The mission was launched aboard a Delta IV Medium+ (4,2) configuration launch vehicle featuring an ULA single common booster core powered by a Pratt & Whitney Rocketdyne (PWR) RS-68 main engine and two Alliant Techsystems (ATK) strap-on solid rocket motors. The payload was encased by a composite payload fairing and powered by the four-meter diameter upper stage using the PWR RL10B-2 engine.  The GPS IIF-2 launch marked the eighth flight of the Delta IV Medium+ (4,2) configuration and the 17th flight of the Delta IV family of launch vehicles.

GPS IIF-2 is the second in a series of next generation GPS satellites and will join a worldwide timing and navigation system utilizing 24 satellites in six different planes, with a minimum of four satellites per plane positioned in orbit approximately 11,000 miles above the earths’ surface. The GPS IIF series provides improved accuracy and enhanced performance for GPS users.

August 5, 2011

Denver, Colo. Decatur, Ala. Harlingen, Texas San Diego, Calif. Vandenberg AFB, Calif.

SOURCE United Launch Alliance

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