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ATK Rocket Motors and Composites Help Launch Global Positioning Satellite Aboard Boeing Delta II Rocket

ATK Supports U.S. Air Force Global Positioning System Upgrade

Nov 8, 2004

Minneapolis, November 8, 2004 – ATK (NYSE: ATK) solid propulsion and composite technologies supported Saturday’s successful launch of a Boeing Delta II rocket from Cape Canaveral Air Force Station, Fla. The launch successfully placed into orbit the 13th Class IIR satellite for the U.S. Air Force’s Global Positioning System (GPS IIR-13) constellation. All 25 of the current GPS satellites were launched with the help of ATK rocket motors.

Augmented thrust for the launch was provided by nine GEM-40 solid propulsion strap-on boosters manufactured by ATK Thiokol — continuing a tradition of flight support for Delta II missions that began in 1990.

Six of the boosters ignited at lift-off with the first-stage main engine. Less than a minute later, the remaining three boosters ignited to provide additional thrust. The spent motors were jettisoned from the rocket as it continued its ascent.

Following burnout and separation of the GEM-40 boosters and the rocket's liquid second stage, a STAR™ 48B third-stage rocket motor propelled the GPS replacement satellite into orbit. A STAR 37FM™ apogee kick motor provided the added velocity to place the satellite into its final inclination and circular orbit.

ATK has manufactured every launch vehicle upper stage and apogee kick motor for the NAVSTAR/GPS constellation dating back to the original experimental flights in the late 1970s.

ATK is a $2.4 billion advanced weapon and space systems company employing 13,600 people in 23 states. News and information can be found on the Internet at www.atk.com.

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