The fifth and final next-generation narrowband communications satellite being built for the U.S. Navy by Lockheed Martin has entered its first system test phase. The Lockheed Martin team recently mated the Mobile User Objective System (MUOS) system module, which carries mission system equipment, and the core—which houses propulsion—with a key antenna for the satellite. The multi-beam assembly hosts 16 ultra-high frequency (UHF) antennas. MUOS is designed to carry the legacy ...


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