Related by context. Frequent words. (Click for all words.) 61 geostationary satellites 60 satellites 59 geosynchronous 59 satellites orbiting 57 geosynchronous orbit 57 geostationary orbit 55 downlinks 54 geostationary transfer 54 GOES O 54 Stratellite 54 satellite 54 geostationary 53 interplanetary spacecraft 53 Remote sensing 53 Resourcesat 2 53 radar altimeter 52 ephemeris 52 Mars orbiters 52 orbiting satellites 52 polar orbit 52 geostationary satellite 52 highly elliptical orbit 52 remote sensing satellites 52 geosynchronous transfer 52 Gyroscopes 51 TerraSAR X 51 polar orbiting 51 payloads 51 SMOS 51 synthetic aperture radar 51 GPS satellites 50 Galileo satellites 50 inertial navigation 50 spacecraft orbiting 50 ALOS 50 orbit 50 circular orbit 50 orbiting Hubble Space Telescope 50 Ku Band 50 Earth orbit 50 optical wavelengths 50 Milstar 50 orbiting 50 optical telescopes 50 Meteorological Satellite 50 orbit spares 50 remotely sensed 49 radiometer 49 Spy satellites 49 MetOp 49 Lunar Reconnaissance Orbiter LRO 49 laser designator 49 spectrographs 49 MAVs 49 collimated 49 flyby spacecraft 49 robotic rovers 48 Proba 48 orbits 48 HiRISE camera 48 AEHF 48 satellite constellation 48 geoid 48 Computers Intelligence Surveillance 48 Cosmic rays 48 infrared telescope 48 laser rangefinder 47 Security GMES 47 orbiting spacecraft 47 extraterrestrial civilizations 47 Vinasat 47 guided munitions 47 Kepler spacecraft 47 infrared imagery 47 DAGR 47 Cryosat 47 Globalstar satellite 47 reconnaissance drones 47 remotely piloted aircraft 47 spacecraft 47 WFC3 47 orbital 47 GOES N 47 Payloads 47 planetary spacecraft 46 interferometers 46 QuickBird 46 payload 46 ionospheric 46 satcom 46 airborne reconnaissance 46 astronomical objects 46 SBAS 46 CALIPSO 46 Tropical Rainfall Measuring 46 lunar orbit 46 directional antenna 46 Proton Breeze M 46 unmanned aerial vehicles 46 mesosphere 46 GAGAN