Company s Five-Segment Boosters will Help Provide Initial Thrust for First Two Minutes of Flight for SLS

Full Booster Certification Set to Complete Later this Year

DULLES, Va.Sep. 6, 2017-- Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, recently completed an important qualification test of the avionics system for the solid rocket boosters the company has developed and is now manufacturing for NASA s Space Launch System (SLS). Completion of this milestone is an important step toward preparing the SLS and Orion spacecraft for their first flight in 2019. Two Orbital ATK-developed five-segment rocket boosters will be used on each SLS launch to help provide initial thrust for the first two minutes of flight.

The avionics system is considered the brains of the booster as it starts booster ignition, communicates with the SLS launch vehicle computers during flight, and initiates booster separation upon completion of the first stage burn. The system is now qualified as meeting NASA s demanding human-rating requirements, which provide a level of redundancy to ensure a safe flight environment through various phases of lift-off, ascent and staging.

Completion of booster avionics system qualification is a significant step forward in supporting overall vehicle qualification and launch of the first flight of SLS Exploration Mission-1, said Jeff Foote, Vice President of NASA Programs for Orbital ATK s Propulsion Systems Division. We are proud of this accomplishment and look forward to completing full certification of the booster later this year.

Qualification of the booster avionics system included a rigorous and comprehensive test series that thoroughly verified the fidelity of the system in a variety of expected and abnormal conditions. Key interactions confirmed during qualification testing included the ability to initiate booster ignition, control the booster during flight, and terminate flight.

The Space Launch System is NASA s new heavy-lift launch vehicle that is being built to take crew and cargo to destinations beyond earth orbit, including to cislunar space and eventually Mars. SLS, along with the Orion spacecraft, will enable human exploration on a variety of missions to deep space. It has the greatest capacity of any launch system ever built, ensuring continued American leadership in space exploration.

Orbital ATK manufactures the twin, five-segment solid rocket boosters in Promontory, Utah, about an hour and a half north of Salt Lake City. Contributing to SLS booster production are 29 key suppliers across 17 states including Alabama, Arizona, California, Connecticut, Florida, Indiana, Kentucky, Massachusetts, Minnesota, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Texas, Utah and Wisconsin.

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 13,000 people across the U.S. and in several international locations. For more information, visit www.orbitalatk.com.

Source: Orbital ATK

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