The Navy plans to launch this addition to the constellation in January 2015.
The MUOS satellite was stressed at extreme hot and cold temperatures in a vacuum at Lockheed Martin's Dual Entry Large Thermal Altitude chamber, simulating the environments the satellite will experience throughout its mission life.
The satellites are equipped with a wideband code division multiple access (WCDMA) payload that leverages commercial cell phone technology. MUOS provides a 10-fold increase in communications capacity compared to the current legacy Ultra High Frequency (UHF) system. Additionally, the WCDMA payload gives users the advantage of high-speed data and priority access that legacy systems did not.