Related by context. Frequent words. (Click for all words.) 77 Gravity Recovery 61 SMOS 61 NASAs 60 Hubble observations 60 Mini SAR 60 Lunar Prospector 60 GOCE 59 COROT 59 interferometers 59 numerical simulations 59 spectrographs 58 spacecraft orbiting 58 NASA ESA Hubble 58 Cassini Huygens 58 Southern Observatory ESO 58 CALIPSO 58 NASA Cassini spacecraft 57 CRISM 57 microlensing 57 ICESat 57 Remote sensing 57 NASA Lunar Reconnaissance 57 infrared telescope 57 remote sensing 57 radar altimeter 57 spectroscopic 57 MARSIS 56 NASA Cassini 56 interplanetary spacecraft 56 polar orbiting 56 interferometer 56 HiRISE camera 56 Oceansat 2 56 VLBI 56 particle detectors 55 Planetary Science Institute 55 HRSC 55 Keck Observatory 55 astronomical observations 55 spectrometers 55 microsatellites 55 XMM Newton 55 remote sensing satellites 55 Spectrometer 55 X ray telescope 54 EPOXI 54 ESO Very Large Telescope 54 synthetic aperture radar 54 satellites 54 CloudSat 54 LIGO 54 planetary missions 54 LCROSS mission 54 X ray Observatory 54 THEMIS 54 Sensing Satellite LCROSS 54 Computer simulations 54 Resourcesat 2 53 NASA Goddard 53 nanosatellite 53 WMAP 53 extrasolar planet 53 optical wavelengths 53 orbiting spacecraft 53 NASA Chandra 53 radial velocity 53 lunar soil 53 JPL manages 53 Arecibo Observatory 53 Jülich 53 multispectral 53 Spitzer Space Telescope 53 Gravity Probe B 53 Earth Observing 53 AeroAstro 53 Lunar Reconnaissance Orbiter 53 optical telescopes 53 polar vortex 53 neutron scattering 53 ocean salinity 53 spectrometry 52 satellites orbiting 52 quantum optics 52 NASA Kepler 52 infrared spectrometer 52 Mauna Kea Hawaii 52 WFC3 52 Planetary Science 52 WM Keck Observatory 52 geodesy 52 remote sensing satellite 52 orbiting Saturn 52 STScI 52 Thermal Emission Imaging 52 NASA Mars Reconnaissance 52 Ocean Observing 52 bathymetry 52 MetOp 52 RADARSAT 52 Jet Propulsion Laboratory JPL 52 ESA Mars