Military communications satellite system multiplies UHF channel capacity for mobile users

The mobile user objective system (MUOS) will be the successor to the Navy's UFO satellite communications system. One MUOS proposal relies on a constellation of GEO spacecraft that uses non-processing repeaters and multiple spotbeams for worldwide Earth-coverage. UHF frequency reuse greatly increases the number of narrowband voice/data channels available to mobile units. A key design element is the large antenna reflector with an area of 1250 square meters.