Lockheed Completes Tests of First MUOS Satellite

The first Mobile User Objective System (MUOS) military communications satellite built by Lockheed Martin for the U.S. Navy has successfully completed a major end-to-end system test, validating satellite performance and functionality with user ground terminals. Completion of this key milestone confirms the system meets requirements and allows the satellite to proceed to final factory test activities prior to launch. MUOS will augment and replace the legacy Ultra High Frequency (UHF) Follow-On system (UFO) providing assured communications, including simultaneous voice, video and data, for mobile warfighters. Each MUOS satellite features two payloads -- a wideband code division multiple access (WCDMA) payload and a legacy UHF payload. This dual payload approach is fully compatible with deployed UHF terminals that will transition to MUOS technology as existing UFO satellites reach the end of their on-orbit life. The WCDMA payload will provide an immediate 16-fold increase over legacy UHF satellite communications in the number and capacity of satellite links. The successful test, conducted at Lockheed Martin's facility in Sunnyvale, Calif., validated the compatibility of the integrated MUOS WCDMA and legacy payloads with the current UFO constellation, existing UHF ground systems, WCDMA test terminals, and Geolocation processing systems. A "Day-in-the-Life" test scenario with simulated MUOS terminal users, a Geolocation operator, legacy terminal operators and a satellite control operator successfully demonstrated simultaneous legacy and WCDMA communications. The scenario also simulated Geolocation operations that successfully detected, identified and located UHF interference sources.