planet, outer, artificial satellite, geostationary, geosynchronous, telecommand, downlink, COMSATS, terrestrial, aerial, more...

origin, primary, central, independent, main

geostationary, geosynchronous, low earth orbit, high earth orbit, solar-powered, artificial, more...

first, artificial, soviet, geostationary, second, small, russian, american, direct, single, third

the moon, to a poet,   part of gps (abbr.),   moon of jupiter,   tail follower,   high-altitude probe,   branch location,   orbiting body,   moon styx,   orbital platform,   goes with orbital