ULA Delta II Completes 20 Year Era With Successful Air Force GPS IIR-21 Launch

CAPE CANAVERAL, Fla., Aug. 17 /PRNewswire/ -- The 48th successful and final
Air Force Delta II Global Positioning System satellite launch occurred today,
ending one of the most successful space launch programs in American history. A
United Launch Alliance Delta II rocket launched GPS IIR-21(M) into orbit from
Space Launch Complex-17A at 6:35 a.m., EDT today. The first Air Force Delta II
GPS launch occurred Feb. 14, 1989 and today's launch marked the 48th
successful GPS mission giving the program a 98 percent success rate. The first
launch in 1989 was NAVSTAR II-1. NAVSTAR is now commonly known as GPS.

Following a nominal 1 hour and 8 minute flight, the rocket deployed the GPS
IIR-21(M) spacecraft, the eighth modernized NAVSTAR Global Positioning System
Block II R-M military navigation satellite. GPS is a space-based positioning
system designed and operated as a 24-satellite constellation that provides
precision navigation and timing information to military and civilian users
worldwide.

"Congratulations to the Air Force and our mission partners in deploying this
revolutionary space system that has changed the world for the better in the
past 20 years," said Jim Sponnick, vice president, Delta Product Line. "One
third of the 143 successful Delta II launches were GPS satellites. The ULA
Delta team is extremely proud to have launched this incredible constellation.
During the past two decades, the system has changed how people live their
lives on a daily basis. GPS has greatly improved military operations as well
as numerous maritime, aircraft, civilian and business operations worldwide."

While this launch concludes the Air Force use of Delta II as it transitions
its systems to Atlas V and Delta IV, the Delta II will still keep launching
into the future for NASA and commercial customers.

"We have the STSS Demo launch set for September, the WorldView-2 launch
scheduled for October, and several more scheduled beyond those missions,"
Sponnick said. "The Delta II workhorse will remain the medium class launch
vehicle industry standard for years to come."

Designed to operate for 10 years, GPS satellites orbit the Earth every 12
hours, emitting continuous navigation signals. With the proper equipment,
users can receive these signals to precisely calculate time, location and
velocity. In addition to its military use, GPS satellites provide directional
assistance to civilian users around the world.

The ULA Delta II 7925-9.5 configuration vehicle featured a ULA first stage
booster powered by a Pratt & Whitney Rocketdyne RS-27A main engine and nine
Alliant Techsystems (ATK) strap-on solid rocket motors. An Aerojet AJ10-118K
engine powered the second stage. A spin-stabilized Star-48B solid-rocket motor
built by ATK boosted the third stage. The payload was encased by a
9.5-foot-diameter metallic payload fairing.

ULA's next launch is the Department of Defense PAN mission scheduled aboard an
Atlas V from SLC-41 here. A specific launch date in September has not been
established.

ULA program management, engineering, test and mission support functions are
headquartered in Denver, Colo. Manufacturing, assembly and integration
operations are located at Decatur, Ala., Harlingen, Texas, San Diego, Calif.,
and Denver, Colo. Launch operations are located at Cape Canaveral Air Force
Station, Fla., and Vandenberg Air Force Base, Calif.

For more information on the ULA joint venture, visit the ULA Web site at
www.ulalaunch.com, or call the ULA Launch Hotline at 1-877-ULA-4321
(852-4321).

SOURCE United Launch Alliance

Michael Rein, +1-321-730-5646 (Office), +1-321-693-6250 (Cell),
michael.j.rein@ulalaunch.com, or Julie Andrews, +1-720-922-7121 (Office),
+1-303-974-8933 (Cell), julie.c.andrews@ulalaunch.com, both of United Launch
Alliance