ViviSat Announces Unique and Agile Hosted Payload Capability on its Mission Extension Vehicle

 ViviSat Announces Unique and Agile Hosted Payload Capability on its Mission
                              Extension Vehicle

PR Newswire

BELTSVILLE, MD., March 19, 2013

BELTSVILLE, MD., March 19, 2013 /PRNewswire/ --ViviSat, the leading provider
of in-orbit servicing, has announced a unique, highly agile hosted payload
capability that will supplement its life extension services.

ViviSat uses the Mission Extension Vehicle (MEV), manufactured by one of its
parent companies, ATK (NYSE: ATK). The primary mission of the MEV is to dock
with an orbiting satellite and serve as the propulsion and attitude control
systems. This enables mission extension for satellites that have run out of
maneuvering fuel yet still have healthy payload and power systems.

"Life extension is the founding mission for the MEV. However, we have an
increasing interest by customers and the scientific community in our unique
agility and the large Space, Weight and Power (SWAP) that we can accommodate,"
said Bryan McGuirk, Chief Operating Officer of ViviSat.

"The MEV can host payloads greater than 200kg and accommodate power demands
greater than 2kW. The differentiating feature of the MEV capability versus
most other GEO Commsat hosts is the ability to be temporarily located to any
orbital slot, or multiple slots, as arranged for by the payload
provider.Furthermore, there is no constraint on pointing or slewing like most
other GEO hosts," said Joe Anderson, Chief Engineer and Director of MEV
Services at ATK.

"Hosted payloads can actually perform as the primary mission during the first
several years of life of the MEV and then the MEV will revert to its original
mission of life extension. This combination of prime mission flexibility,
orbit location agility and large SWAP opens up a new market that cannot be met
by typical GEO Commsats," said retired Maj. Gen. Craig Weston, CEO of ViviSat.

Attendees at the upcoming Satellite 2013 Conference in Washington, D.C., on
March 18-21 can learn more about ViviSat at the ATK exhibit booth (#9039)
inside the Walter E. Washington Convention Center.Members of the ViviSat team
will be available to share informationandintroduce an animated video of
ViviSat's Mission Extension Vehicle (MEV) and discuss its hosted payload

Further information about ViviSat can be found at the company's website:

Certain information discussed in this press release constitutes
forward-looking statements as defined in the Private Securities Litigation
Reform Act of 1995. Although ATK and U.S. Space believe that the expectations
reflected in such forward-looking statements are based on reasonable
assumptions, they can give no assurance that their expectations will be
achieved. Forward-looking information is subject to certain risks, trends, and
uncertainties that could cause actual results to differ materially from those
projected. Among these factors are: technical challenges associated with the
development and performance of advanced space technologies and services, and
assumptions regarding the development of commercial and governmental markets
for in-orbit mission extension and operations protection. Neither ATK nor U.S.
Space undertakes any obligation to update any forward-looking statements. For
further information on factors that could impact ATK, and statements contained
herein, please refer to ATK's most recent Annual Report on Form 10-K and any
subsequent quarterly reports on Form 10-Q and current reports on Form 8-K
filed with the U.S. Securities and Exchange Commission.

U.S. Space LLC is a U.S.-owned provider of dedicated, commercial space
solutions. The company was established in January 2009 as a U.S.-owned
provider of satellite solutions with a unique model combining the best
commercial and government practices. The company, which is run by a small
group of highly respected former military and corporate leaders, now offers a
variety of dedicated space solutions to serve the nation's interests. More
information on the company is available at

ATK is an aerospace, defense, and commercial products company with operations
in 21states, Puerto Rico, and internationally. News and information can be
found on the Internet at

MEDIA CONTACTS: Vicki Cox, ATK, 301-902-4372


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