Orbital ATK Products Integral to United Launch Alliance Atlas V Launch of Lockheed Martin-Built MUOS-5 Satellite for the U.S. Navy
MUOS-5 Satellite Provides Mobile Forces Improved and Secure Communications

Dulles, Virginia 24 June 2016 – Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, provided critical launch vehicle and satellite hardware for today’s United Launch Alliance Atlas V launch of the fifth Lockheed Martin-built satellite for the U.S. Navy's Mobile User Objective System (MUOS-5). Orbital ATK’s contributions to the Atlas V and MUOS-5 satellite include cutting-edge technologies from across the company including a large composite faring, retro motors and propellant tanks for the rocket, and several components and structures on the satellite.

"It's always good to see another successful ULA Launch of an Atlas V Rocket,  said Scott Lehr, President of Orbital ATK’s Flight Systems Group. “For the MOUS-5 launch, in addition to the launch vehicle structures we typically provide, Orbital ATK made key components for the U.S. Navy satellite as well, demonstrating our broad role in the U.S launch industry and the breadth of our product lines."

Using advanced fiber placement manufacturing and automated inspection techniques, Orbital ATK produced three components for the ULA Atlas V vehicle, including the 10-foot diameter composite heat shield that provides essential protection to the first stage engine, the Centaur Interstage Adapter that houses the second stage engine, and the boattail that adapts from the core vehicle to the five-meter diameter fairing. Orbital ATK fabricated these structures at its Iuka, Mississippi, facility. This is the 62nd Atlas V launch using Orbital ATK-built composite structures.

The ULA Atlas V rocket flew in the 551 vehicle configuration with a five-meter fairing, five solid rocket boosters and a single-engine Centaur upper stage. Orbital ATK manufactured the Reaction Control System propellant tank for the ULA Atlas V at its Commerce, California, facility.

This launch marked the 26th successful flight of the Orbital ATK retro motors. Eight of these solid motors provided thrust for separation of the spent first stage. Orbital ATK builds the retrorocket for the ULA Atlas V at its Elkton, Maryland, facility.

MUOS is the next generation in narrowband tactical satellite communications systems. The MUOS-5 satellite is the fifth in the MUOS spacecraft series for which Orbital ATK has provided multiple components and structures to prime contractor Lockheed Martin from various sites around the company. The Commerce, California site produced fuel and oxidizer tanks for the satellite, and the San Diego, California facility provided the bus structure, antenna reflectors, solar array yokes and boom structures. The solar array hinges were manufactured in Orbital ATK’s Goleta, California location. Facilities in Magna, Utah produced the booms, ribs and other composite components for the 14m and 5m deployable antennas for the Harris Corporation. Orbital ATK has provided similar structural components for the spacecraft industry for more than 35 years from sites in California and Utah. Critical communications radiator panels were built at the Beltsville, Maryland location. Orbital ATK has delivered more than 50,000 heat pipes to the space industry with perfect, on-orbit mission success.

MUOS-5 is the latest addition to a network of orbiting satellites and relay ground stations that is revolutionizing secure communications for mobile military forces. Users with MUOS terminals will be able to seamlessly connect beyond line-of-sight around the world and into the Global Information Grid. MUOS’ capabilities include simultaneous, crystal-clear voice, video and mission data over a secure high-speed Internet Protocol-based system. Once fully operational, MUOS will provide users with 16 times more communications capacity than the legacy system it will eventually replace.  MUOS-1, MUOS-2, MUOS-3 and MUOS-4 launched respectively in 2012, 2013 and January and September of 2015, and are already providing high-quality voice communications.

About Orbital ATK

Orbital ATK is a global leader in aerospace and defense technologies. The company designs, builds and delivers space, defense and aviation systems for customers around the world, both as a prime contractor and merchant supplier. Its main products include launch vehicles and related propulsion systems; missile products, subsystems and defense electronics; precision weapons, armament systems and ammunition; satellites and associated space components and services; and advanced aerospace structures. Headquartered in Dulles, Virginia, Orbital ATK employs approximately 12,000 people in 18 states across the U.S. and in several international locations. For more information, visit www.orbitalatk.com.


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Media Contact
Bryan Warren
(801) 775-1233
bryan.warren@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com
Media Contact
Bryan Warren
(801) 775-1233
bryan.warren@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com