Orbital ATK Inc.
 Press Release
Orbital ATK Successfully Completes Spacecraft Preliminary Design Review for Vital Weather Forecasting Satellite

Next-generation Joint Polar Satellite System-2 Spacecraft on Schedule for 2020 Delivery

Satellite Represents Company’s First Operational Weather Spacecraft


Gilbert, Arizona 12 September 2016 – Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, announced today that the program team has successfully completed NOAA’s Joint Polar Satellite System (JPSS) Spacecraft Preliminary Design Review (PDR) for JPSS-2, and the Polar Follow-On/JPSS -3 and -4. Built on Orbital ATK’s proven and reliable LEOStar-3TM platform, these spacecraft will host instruments that provide essential operational space-based weather observations for the National Oceanic and Atmospheric Administration (NOAA).

The four-day spacecraft PDR was conducted August 29 through September 1 at Orbital ATK’s facility in Gilbert, Arizona where the spacecraft are being designed and built. Representatives from NOAA and NASA, including satellite instrument providers and independent reviewers, participated in this important program milestone.

“Our JPSS spacecraft Preliminary Design Review successfully demonstrated that we are meeting all system and schedule requirements,” said Steve Krein, Vice President of Science and Environmental Programs at Orbital ATK. “Our customers are pleased with the spacecraft’s design progress, which allows us to proceed with detailed design and long-lead build schedules in preparation for the Spacecraft Critical Design Review for the JPSS-2 satellite.”

The JPSS-2 satellite will join a constellation of satellites, including the Suomi National Polar-orbiting Partnership and JPSS-1, which gather global measurements of atmospheric, terrestrial and oceanic conditions. During the required seven-year design life, JPSS-2 will deliver observations essential for accurate forecasting up to seven days ahead of severe weather like hurricanes, tornadoes and blizzards. The data collected will also be used to assess environmental hazards such as sea ice, floods, volcanic ash, wild fires and poor air quality. The result is timely and accurate public forecasts that reduce the potential loss of life and property and minimize economic impact.

While Orbital ATK has designed and built a wide variety of innovative Earth science, commercial imaging and defense satellites, the spacecraft for JPSS are the first weather operations spacecraft the company will design and produce. With the spacecraft PDR complete, Orbital ATK is proceeding to the Spacecraft Critical Design Review (CDR), currently scheduled for second quarter CY 2017. Once delivered to the Vandenberg Air Force Base launch site in California, Orbital ATK will support launch and early on-orbit checkout of the satellite.

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
Vicki Cox
(410) 409-8723
vicki.cox@orbitalatk.com

Investor Contact
Barron Beneski
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