The IGS Radar 1 & Optical 1 (Intelligence Gathering Satellite) are Japanese radar and optical reconnaissance satellites. The satellites are operated by the Cabinet Satellite Information Center. The satellites serve both Japan's national defense and civil natural disaster monitoring.
Sun-Synchronous OrbitThe U.S. Air Force Space Command operates 10 Phase III DSCS satellites providing defense officials and battlefield commanders secure voice and high rate data communications. The DSCS III system also transmits space operations and early warning data to various systems and users.
Geostationary Transfer OrbitUSA-166, also known as GPS IIR-8 and GPS SVN-56, is an American navigation satellite which forms part of the Global Positioning System. It was the eighth Block IIR GPS satellite to be launched, out of thirteen in the original configuration, and twenty one overall.
Medium Earth Orbit