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Atlas V to Launch the Fourth Mobile User Objective System (MUOS-4)

Rocket/Payload: An Atlas V 551 will launch the Navy’s fourth Mobile User Objective System (MUOS-4) satellite.

MUOS4Date/Site/Launch Time: Monday, Aug. 31, 2015, from Space Launch Complex-41 at Cape Canaveral Air Force Station, Florida.

Mission Description: The Mobile User Objective System (MUOS) is a next-generation narrowband tactical satellite communications system designed to significantly improve ground communications for U.S. forces on the move.

MUOS will provide military users 10 times more communications capability over existing systems, including simultaneous voice, video and data, leveraging 3G mobile communications technology.

Launch Notes:
MUOS-4 will mark the 56th Atlas V since the vehicle’s inaugural launch in August 2002 and the sixth in the 551 configuration. Previous missions launched on Atlas V 551 missions include three MUOS missions as well as the New Horizons mission to Pluto and the Juno mission to Jupiter.

Launch Updates: To keep up to speed with updates to the launch countdown, dial the ULA launch hotline at 1-877-852-4321 or join the conversation at, and

Go Atlas! Go Centaur! Go MUOS-4!



July 23, 2015: A United Launch Alliance (ULA) Delta IV rocket lifts off carrying the seventh Wideband Global SATCOM satellite for the U.S. Air Force. Wideband Global SATCOM provides anytime, anywhere communication for the warfighter through broadcast, multicast and point to point connections.