U.S. Navy Accepts Fourth Lockheed Martin-Built MUOS Satellite for Secure Communications Network
(Source: Lockheed Martin; issued Dec. 3, 2015)
SAN DIEGO --- Following the completion of successful on-orbit testing, on Nov. 30, the U.S. Navy accepted the fourth Lockheed Martin-built Mobile User Objective System (MUOS) satellite.

Launched Sept. 2, MUOS-4 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 operational MUOS terminals can seamlessly connect beyond line-of-sight around the world and into the Global Information Grid. MUOS' new commercial, cellular-based capabilities include simultaneous, crystal-clear voice, video and mission data, over a secure high-speed Internet Protocol-based system.

"MUOS-4 completes the initial constellation, providing the MUOS network with nearly global coverage. Mobile forces, equipped with MUOS terminals, will soon be able to communicate with each other - including voice, data and exchanging imagery - real-time, virtually anywhere on the Earth," said Iris Bombelyn, Lockheed Martin's vice president for Narrowband Communications. "This is a tremendous upgrade in communications capabilities over what currently exists for our nation and our allies."

MUOS-4 will be relocated in Spring 2016 to its on-orbit operational slot in preparation for operational acceptance. The satellite joins MUOS-1, MUOS-2 and MUOS-3, launched respectively in 2012, 2013 and January 2015, and four required MUOS ground stations. MUOS-5, an on-orbit spare, also will be launched next year.

Once fully operational, the MUOS network will provide 16 times the capacity of the legacy ultra-high frequency communications satellite system, which it will continue to support, and eventually replace. More than 55,000 currently fielded radio terminals can be upgraded to be MUOS-compatible, with many of them requiring just a software upgrade.


Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company that - with the addition of Sikorsky - employs approximately 126,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services.

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