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The Mobile User Objective System (MUOS) is an array of geosynchronous satellites being developed for the United States Department of Defense (DoD) to provide global satellite communications (SATCOM) narrowband (64 kbit/s and below) connectivity for communications use by the United States and allies.
The MUOS System is an Ultra High Frequency (UHF) (300 MHz to 3 GHz frequency range) SATCOM system, primarily serving the DoD. The MUOS will replace the legacy UHF Follow-On (UFO) system, before that system reaches its end of life, to provide users with new capabilities and enhanced mobility, access, capacity, and quality of service. Intended primarily for mobile users (e.g. aerial and maritime platforms, ground vehicles, and dismounted soldiers), MUOS will extend users' voice, data, and video communications beyond their lines-of-sight.
The MUOS operates as a global cellular service provider to support the war fighter with modern cell phone-like capabilities, such as multimedia. It converts a commercial third generation (3G) Wideband Code Division Multiple Access (WCDMA) cellular phone system to a military UHF SATCOM radio system using geosynchronous satellites in place of cell towers.
