MUOS-4 launch

The US Navy/Lockheed Martin MUOS-4 communications satellite flew into orbit on a United Launch Alliance Atlas V rocket on September 2, 2015 from Cape Canaveral.

The U.S. Navy’s Mobile User Objective System (MUOS) is a next-generation narrowband tactical satellite communications system designed using a combination of orbiting satellites and relay ground stations to significantly improve communications for U.S. forces on the move. MUOS will provide new beyond-line-of-sight communications capabilities, with smartphone-like simultaneous voice, video and data – to connect military users almost anywhere around the globe.

This mission was launched aboard an Atlas V 551 configuration vehicle, which includes a 5-meter diameter payload fairing along with five Aerojet Rocketdyne solid rocket motors attached to the Atlas booster. The Atlas booster for this mission was powered by the RD AMROSS RD-180 engine and the Centaur upper stage was powered by the Aerojet Rocketdyne RL10C-1 engine.

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