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(Click for frequent words.) 67 laser altimeter 66 polarimetric 66 Earth orbiting satellites 66 infrared telescopes 65 situ measurements 65 APXS 64 radiometers 64 scatterometer 63 Planck satellite 63 orbiting telescopes 63 interplanetary spacecraft 63 polar orbiting 63 Mars landers 63 ESA ERS 63 AERONET 63 EPOCh 63 Uninhabited Aerial Vehicle 62 Philae lander 62 planetary Transits 62 SMOS 62 earth orbiting satellites 62 radio occultation 62 Hubble Space Telescope HST 62 D CIXS 62 gamma ray observatories 62 polar orbiting satellites 62 LISA Pathfinder 62 QWIP 62 radars telemetry 62 gamma ray detectors 62 polarimetry 61 Synthetic Aperture Radar 61 microwave radiometers 61 Mars Climate Sounder 61 remote sensing 61 Mission SRTM 61 Ocean Salinity 61 orbiting gamma ray 61 Remote sensing 61 geosynchronous satellites 61 infrared astronomy 61 aboard ESA Envisat 61 ESA Planck 61 geosynchronous 61 penetrating radar 60 gamma ray spectrometer 60 IFSAR 60 infrared spectrometers 60 retroreflector 60 X ray observatory 60 ADM Aeolus 60 astrometric 60 Synthetic Aperture Radar SAR 60 SIRAL 60 thermal infrared 60 X ray spectrometer 60 remotely sensed 60 Mars Pathfinder lander 60 neutron spectrometer 60 Advanced Microwave Scanning 60 VIIRS 60 NuSTAR 60 NAVSTAR Global Positioning System 60 Infrared Pathfinder Satellite 60 radar altimeter 60 O OREOS 60 satellite altimeters 60 ESA Envisat 59 Landsat satellites 59 NASA Landsat 59 Planetary Transits 59 airglow 59 orbiting observatories 59 hyper spectral 59 EO IR sensor 59 Envisat satellites 59 Redu Belgium 59 Earth Observation EO 59 Phased array 59 Solar Orbiter 59 WISE infrared 59 microwave radiometer 59 NPOESS Preparatory Project 59 ENVISAT 59 airborne shipboard 59 SMOS Soil Moisture 59 gradiometer 59 Convection Rotation 59 Interferometric Synthetic Aperture Radar 59 SMOS mission 59 RADARSAT 2 59 TDRSS 59 multibeam 59 SCIAMACHY 59 Ulysses spacecraft 59 HIAPER 59 TanDEM X 59 observing satellites 59 Climate Experiment GRACE 58 Solar TErrestrial RElations Observatory 58 X ray telescopes 58 TerraSAR X 58 LRO spacecraft 58 OMPS 58 Cryosat 58 NASA Wilkinson Microwave 58 Mars Reconnaissance Orbiter MRO 58 radar altimeters 58 Faint Object 58 NASA twin STEREO 58 NASA Far Ultraviolet 58 Satellites GOES 58 cryogenically cooled 58 Mars Color Imager 58 Mössbauer 58 spectrographic 58 cryocooler 58 Metop 58 electro optical sensors 58 Global Positioning Satellites 58 microshutters 58 Moderate Resolution Imaging 58 Galileo constellation 58 Heterodyne Instrument 58 spectrographs 58 spectrometric 58 STEREO spacecraft 58 geosynchronous satellite 58 interferometric 57 radar altimetry 57 Total Ozone Mapping 57 neutron detector 57 Shuttle Radar Topography 57 GALEX 57 EDXRF 57 IBEX spacecraft 57 Aqua satellite 57 NIRCam 57 Raman spectrometer 57 Interferometric 57 telescopic observations 57 lidar instrument 57 deorbiting 57 microwave remote sensing 57 Gamma ray 57 satellites orbiting Earth 57 intelligence SIGINT 57 imaging spectrometer 57 HARPS instrument 57 Infrared Astronomical Satellite IRAS 57 Anisotropy Probe WMAP 57 SPIRE instrument 57 radiometer 57 GOES satellites 57 gamma ray observatory 57 extrasolar planetary 57 Helioseismic 57 Array ALMA 57 Ocean Salinity SMOS 57 AIRSS 57 VIRTIS 57 NASA EPOXI mission 57 Smos 57 altimetry 57 Cometary 57 NASA Stratospheric Observatory 57 Herschel Space 57 neutrino detectors 57 Lidar 57 hyperspectral imager 57 NASAs 57 astronomical observations 57 BepiColombo 57 QuikSCAT 57 NEXRAD 57 NASA Atmospheric Infrared 57 sondes 57 mineralogical mapping 57 multispectral 57 quantum cascade 57 AMPERE 57 STSS satellites 57 LEO satellites 57 hyperspectral 57 GOSAT 57 AATSR 57 LOFAR 57 radiosondes 57 astronomical telescope 57 fiber optic gyroscopes 57 airborne LIDAR 57 Nasa spacecraft 57 GIOVE B 57 Cloud Aerosol Lidar 57 Environmental Satellite POES 57 high altitude airship 57 SeaWiFS 57 heavily instrumented 56 Magnetospheric 56 stellar occultation 56 ESA Envisat satellite 56 UAVSAR 56 inertial navigation systems 56 Spectrograph 56 LADEE 56 maritime subsurface 56 NOAA GOES 56 NASA Cosmic Background 56 multiwavelength 56 Solar Dynamics Observatory 56 ICESat 56 SCISAT 56 Ultraviolet Imaging Spectrograph UVIS 56 ChemCam 56 Spitzer infrared 56 NASA THEMIS 56 lidar 56 satellites 56 Helios 2B 56 EarthCARE 56 Interferometer 56 ESO VLT 56 exoplanetary 56 hydrogen maser 56 MARSIS radar 56 meteorological oceanographic 56 geo synchronous 56 Mars Pathfinder 56 ASKAP 56 electromagnetic simulation 56 deformable mirrors 56 SOHO spacecraft 56 Envisat ASAR 56 C NOFS 56 Cosmic Origins Spectrograph COS 56 Lunar Reconnaissance Orbiter LRO 56 CALIPSO satellites 56 WMAP satellite 56 gyro stabilized 56 Moon Mineralogy Mapper M3 56 synthetic aperture radar 56 Fermi LAT 56 Vexcel Corporation 56 interferometric synthetic aperture radar 56 CHIPSat 56 sodar 56 stellar occultations 56 Keck telescopes 56 GNSS receivers 56 radiometry 56 highly elliptical orbits 56 hyperspectral sensors 56 Multispectral 56 datalinks 56 Hyperspectral 56 ESTRACK 56 NASA CloudSat 56 Composite Infrared Spectrometer 56 astronomical telescopes 56 handheld XRF 56 synthetic aperture 56 HARPS spectrograph attached 56 Proba 2 56 LEOP 56 Reflection Radiometer 56 Orion MPCV 56 Cosmic Background Explorer COBE 56 Interferometer VLTI 56 Orbiter MRO 56 DISR 56 meteorological satellites 56 Imaging Spectrometer 56 Mars orbiters 56 scramjet propulsion 56 Huygens mission 55 non dispersive infrared 55 GNSS receiver 55 Chajnantor plateau 55 CrIS 55 Australian SKA Pathfinder 55 imaging spectroscopy 55 radial velocity technique 55 detect gravitational waves 55 astrometry 55 MUOS satellites 55 photometer 55 Ground penetrating radar 55 gamma ray detector 55 Mini SAR 55 Polar Operational 55 optronic 55 Orbiter LRO 55 Meteorological Satellite 55 RHESSI 55 MASINT 55 DMSP F# 55 planetary missions 55 airborne lidar 55 geosynchronous GEO 55 datalogger 55 ELINT 55 Hyperspectral Imager 55 Martian rovers 55 Advanced Synthetic Aperture 55 GPS IIF 55 ionospheric 55 Galileo satellites 55 Antenna LISA 55 Synthetic Aperture 55 High Resolution Imaging 55 STSS Demonstration 55 satellites orbiting 55 Mini Thermal Emission 55 SIM PlanetQuest 55 Infrared Astronomy 55 RPWS 55 AMSR E 55 hyperspectral imagery 55 lunar landers 55 laser altimetry 55 geostationary communications 55 Spectrometers 55 twin STEREO spacecraft 55 Greenbelt Md. manages 55 ROSAT 55 indium gallium arsenide InGaAs 55 ExoMars rover 55 SQUIDs 55 spectrometers 55 Kepler spacecraft 55 geoid 55 radar lidar 55 SPHERES 55 RXTE 55 photometers 55 X ray observatories 55 moonquakes 55 quantum cascade lasers 55 NFIRE satellite 55 Optech ALTM 55 AKARI 55 electro optic sensors 55 Terrestrial Planet Finder TPF 55 Saturnian moon Titan 55 QZSS 55 Scatterometer 55 GLAST spacecraft 55 Envisat 55 uncooled infrared 55 LADAR 55 spectroscopic analysis 55 GEO satellites 55 WindTracer 55 VISTA telescope 55 unmanned robotic 55 Hubble orbits 55 CloudSat 55 Nasa Kepler 55 LAGEOS 55 orbital rendezvous 55 Differential GPS 55 airborne LiDAR 55 reflectorless 55 NFIRE 55 Laser Interferometer Gravitational Wave 55 Mars moon Phobos 55 mercury cadmium telluride 55 Mars Surveyor 55 wavefront sensing 55 Rosetta orbiter 55 Fourier Transform Infrared FTIR 55 C1XS 55 SBSS satellite 55 Sounder AIRS instrument 55 Interior Laboratory GRAIL 55 TIROS 55 SWIR cameras 55 POES satellites 55 FPAs 55 telemetry tracking 55 Huygens descent 55 Evolution Explorer 55 robotic landers 55 DigitalGlobe constellation 55 Anisotropy Probe 55 Landsat satellite 55 SBSS Block 55 Instrument OMI 55 infrared observatory 54 Adaptive optics 54 DigitalGlobe WorldView 54 VeeLo NextGen 54 Aerosol Polarimetry Sensor 54 observatories 54 MARSIS 54 Light Detection 54 spectroscopic measurements 54 Solar Optical Telescope 54 Observatory SDO 54 lunar regolith 54 extrasolar 54 TerraSAR X satellite 54 Magnetic Imager HMI 54 radial velocity measurements 54 CBERS 2B 54 Globalstar constellation 54 Mission TRMM 54 electrodynamic 54 Gamma ray burst 54 Inertial Navigation System 54 geostationary orbits 54 GeneSat 54 Nasa Mars Reconnaissance 54 Environment Explorer LADEE 54 geodesy 54 spacecraft orbited 54 MG J# +# 54 Security GMES 54 Klinkrad 54 GMTI 54 X ray Telescope XRT 54 Spectrometer 54 orbit GEO 54 spectro 54 EarthScope 54 enters lunar orbit 54 ray Space Telescope 54 resolution panchromatic 54 Suite VIIRS 54 Tropospheric Emission Spectrometer 54 inertial sensor 54 Infrared Camera 54 NASA Lunar Prospector 54 NEOSSat 54 gamma ray telescopes 54 LIDAR Light 54 Orbital Express 54 smallest exoplanet 54 GPS GNSS 54 exoplanets planets 54 GeoSAR 54 remote sensing payloads 54 Descent Imager Spectral Radiometer 54 THEMIS satellites 54 TSN PZ camera 54 optical telescopes 54 Foton M3 54 inertial measurement 54 submillimetre 54 speckle patterns 54 Elenin 54 Lunar CRater Observation 54 NASA Lunar Crater 54 NASA ICESat 54 orbiter Mars Odyssey 54 Continuity Mission LDCM 54 Milstar satellites 54 Diviner Lunar Radiometer Experiment 54 OSIRIS 54 remote sensing instruments 54 GIS remote sensing 54 geostationary 54 Solar Terrestrial Relations 54 Block IIF 54 Ground Penetrating Radar GPR 54 stratospheric airship 54 Fermi telescope 54 Space Telescope GLAST 54 geodetic 54 Lunar Laser Ranging 54 irregularly shaped asteroid 54 InSAR 54 visit http:/saturn.jpl.nasa.gov 54 correlator 54 frequency combs 54 Magnetometer 54 SIRTF 54 Deep Impact comet 54 Michelson interferometer 54 GOCE 54 COROT 54 Navstar GPS 54 Lee Lueng Fu 54 SuperWASP 54 Dan Werthimer 54 interferometers 54 synchrotron x ray 54 RapidEye constellation 54 WAAS GPS 54 INMS 54 MetOp satellite 54 HAMSAT 54 Keck Interferometer 54 Global Differential GPS 54 bolometers 54 N. Rathnasree 54 EKV 54 Foton M2 54 spacecraft orbiting 54 NPO Lavochkin 54 correlation spectroscopy 54 Rosetta spacecraft 54 propulsion subsystem 54 ESA XMM Newton 54 satellite altimetry 54 astrophysical phenomena 54 MetOp 54 distant supernovae 54 Earth orbiting spacecraft 54 satID 54 Thales Alenia 54 SPICAM 54 SEGUE 54 CALIPSO 54 lunar rovers 53 Alpha Particle 53 detect gamma rays 53 WFC3 53 Aerial photography 53 spectroscopic 53 GOES N 53 Submillimeter Array 53 dropsondes 53 MQ 8B 53 nanometrology 53 Alphabus 53 Stratellite 53 Planck spacecraft 53 GPS Block IIF 53 passive infrared 53 multisensor 53 CARTOSAT 53 geosynchronous Earth 53 satellite RISAT 53 Wilkinson Microwave Anisotropy Probe 53 ESA CryoSat 53 Dektak 53 Laser Interferometer Space 53 WISE telescope 53 Relative Navigation 53 geostationary earth 53 infrared ultraviolet 53 vehicles UGVs 53 mineralogical composition 53 photoelectron 53 Observatory STEREO 53 Multi Object Spectrograph 53 Spacebus 53 ESA GOCE 53 Argo floats 53 WISE spacecraft 53 SeaSpace 53 MEMS Inertial 53 Ranging MESSENGER spacecraft 53 lunar orbiters 53 NAVSTAR 53 ExoMars mission 53 Anthony Remijan 53 hexagonal mirrors 53 monochromators 53 remote sensing satellites 53 narrowband tactical 53 SBIRS GEO 53 Diviner 53 Airborne Topographic Mapper 53 submillimeter wavelength 53 Relations Observatory STEREO 53 MicroFUN 53 DIXI 53 remote sensing imagery 53 Shepherding Spacecraft 53 multispectral imaging 53 interplanetary missions 53 multiband imaging photometer 53 operationally responsive space 53 GPS IIF satellites 53 ultrahigh resolution 53 NASA COBE satellite 53 Aquarius SAC 53 UKIRT 53 Constellation Observing 53 Flyby spacecraft 53 onboard Chandrayaan 53 IKONOS 53 ESA Integral 53 robotic rovers 53 tethered aerostat 53 Spectroscopic 53 orbiters landers 53 Suzaku X ray 53 LiDAR 53 azimuthal 53 radomes 53 e VLBI 53 orbiting spacecraft 53 Diviner instrument 53 Shallow Subsurface Radar 53 crustal thickness 53 Meteosat satellites 53 reflectometer 53 numerical modeling 53 NASA QuikScat satellite 53 SSPAs 53 COMINT 53 Imaging Spectroradiometer MODIS instrument 53 Astrosat 53 Iridium satellites 53 Foton spacecraft 53 USVs 53 Mercury magnetosphere 53 Ionospheric Sounding 53 ARGUS IS 53 RQ 7B Shadow 53 INSAT 3D 53 Infrared Astronomy SOFIA 53 Mini TES 53 spacecraft 53 cryocoolers 53 electromagnetic signals 53 Geosynchronous 53 electromagnetic flowmeter 53 hypervelocity 53 Profiler Suite OMPS 53 X ray spectroscopy 53 infrared spectra 53 sampling oscilloscopes 53 expertise ICx pioneers 53 exo planet 53 exoplanet hunter 53 AIRS instrument 53 aerosol particle 53 GOCE satellite 53 Atmospheric Infrared Sounder 53 Cosmic Microwave Background 53 NASA STEREO 53 Ken Herkenhoff 53 e MERLIN 53 auroral emissions 53 electromagnetics 53 Planetary Fourier Spectrometer PFS 53 Thermal Emission Spectrometer 53 particle detector 53 Miniature Synthetic Aperture Radar 53 hyper spectral imaging 53 Eurobot 53 shortwave infrared 53 unmanned probes 53 long baseline interferometry 53 VectorSeis 53 Envisat satellite 52 radar interferometry 52 Proba 52 Interplanetary Internet 52 realSens ™ 52 aerosol measurements 52 resolution synthetic aperture 52 altimeters 52 ion propulsion 52 Astrium Satellites 52 Neutral Mass Spectrometer 52 uncooled thermal 52 infrared telescope 52 L5 signal 52 EPOXI spacecraft 52 InfraRed 52 inertial navigation 52 cosmic ray particles 52 cryo electron microscope 52 Glonass K 52 SpaceWire 52 Voyager spacecraft 52 infrared imager 52 SRTM 52 infrared sensing 52 infrared detector 52 planetary transits 52 echo sounders 52 Forward Looking Infrared FLIR 52 Fourier transform infrared FTIR 52 geostationary satellites 52 Shallow Radar 52 SAXS 52 ion thrusters 52 BuckEye 52 terahertz imaging 52 troposcatter communications 52 Eric Becklin 52 microspectroscopy 52 Hinode spacecraft 52 terrestrial concentrator 52 inertial measurement unit 52 opto mechanical 52 Delfi C3 52 ESA Rosetta 52 gamma spectrometry 52 eyepiece #/#s f/#.# 52 multispectral camera 52 infra red imaging 52 Webb Telescope 52 MAVs 52 Chajnantor 52 inertial guidance 52 RTK GPS 52 electromagnetic flux 52 Jupiter Icy Moons Orbiter 52 satelites 52 panchromatic camera 52 NASA rovers 52 rubidium clocks 52 FTIR spectroscopy 52 Phased Array 52 RQ 4N 52 OSIRIS REx 52 SINFONI 52 Resourcesat 2 52 near infrared spectroscopic 52 jovian 52 spectroradiometers 52 Satellite Aided Tracking 52 Laser Ranging 52 NASA Kepler spacecraft 52 Landsat imagery 52 metocean 52 scramjet engines 52 Area Telescope LAT 52 occultations 52 ATV Jules Verne 52 photometry 52 geostationary satellite 52 neutrino telescope 52 Ozone Monitoring 52 bolometer 52 ESA SMART 52 hygrometers 52 Atacama Large Millimeter submillimeter 52 Near Infrared Camera 52 millimeter wavelengths 52 inertial navigation system 52 Spectroradiometer 52 microgravity experiments 52 Orbiter spacecraft 52 exhaust plume 52 neutrino experiments 52 Predator unmanned 52 ESO telescopes 52 Orbiting Carbon Observatory OCO 52 Geoscience Laser Altimeter 52 coriolis 52 Climate Sounder 52 ultraviolet spectrograph 52 Ranging LIDAR 52 detector arrays 52 A# spacecraft 52 BroadSeis 52 Mars orbiter 52 Highly Adaptable Satellite 52 Fiber Bragg Grating 52 spectral bands 52 Cygnus Lyra region 52 exobiology 52 HRSC 52 THEMIS spacecraft 52 ultrashort pulses 52 Spaceguard 52 BBSNews #-#-# NASA 52 Infrared Atmospheric 52 x ray fluorescence 52 planimetric 52 EVLA 52 Curiosity rover 52 dexterous robot 52 ESA Cluster 52 airborne hyperspectral 52 ATSR 52 windshield wiper maneuver 52 Planck telescope 52 Heliospheric 52 ESA Proba 52 Electromagnetic EM 52 GPS GLONASS 52 GPS WAAS 52 UK DMC2 52 APEX telescope 52 nanosatellite 52 geo stationary satellite 52 Beamline #.#.# 52 electro optical infrared 52 Saturn Cassini 52 Meteorological Satellites 52 CARTOSAT 2A 52 UV spectroscopy 52 Ariane launcher 52 Pan STARRS 52 Spirent GSS# 52 spectral radiance 52 telescopes 52 interferograms 52 FORMOSAT 52 GOES O 52 reflectometry 52 Huygens Probe 52 spatially resolved 52 UCO Lick 52 infrared spectrograph 52 ESA Earth Observation 52 Well Infrared Photodetector 52 Multibeam 52 infrared imagery 52 interferometry 52 FT IR spectrometer 52 linear Fresnel 52 unmanned reconnaissance 52 Dan Durda 52 geosynchronous orbits 52 HOBO U# 52 Magnetic Imager 52 photoionization detectors 52 nanosatellites 52 GOES R 52 Orbital Debris 52 electromagnetic EM 52 Atacama Large Millimeter Array 52 JIMO 52 polar mesospheric clouds 52 Stratospheric Observatory 52 uncrewed 52 IR spectroscopy 52 Q TOF 52 hypersonic missiles 52 radiotelescope 52 EPOXI mission 52 hypersonic glider 52 Oceansat 52 STORRM 52 magnetometry 52 E 8C 52 Force Microscopy 52 Stratellite TM 52 hyperspectral remote sensing 52 gamma ray spectrometry 52 Infrared Telescope Facility 52 UVOT 52 Aerojet propulsion 52 Climate Experiment SORCE 52 particle astrophysics 52 Infrared Array Camera 52 Panoramic Camera 52 geo stationary orbit 51 Submillimeter 51 Skynet 5C 51 planets asteroids 51 gravity gradiometer 51 oceanographic measurements 51 radiosonde 51 XMM Newton 51 Dana Yoerger 51 Nikon D# Kowa 51 ASTAMIDS 51 extrasolar planetary systems 51 interferometer 51 unpiloted aircraft 51 astronomical observatories 51 RISAT 2 51 Tropical Rainfall Measuring 51 X ray microscopy 51 electric ion propulsion 51 ScanStation C# 51 MTSAT 51 invisibility cloaking 51 Microscopy Electrochemistry 51 GMES 51 EADS Astrium GmbH 51 sensors actuators 51 tunable diode laser 51 comets asteroids 51 Ultraviolet Optical Telescope 51 scanning electron microscopes 51 Swales Aerospace 51 fluorescence spectroscopy 51 logarithmic amplifiers 51 Galileo spacecraft 51 GPS IIR M 51 Upsilon Andromedae 51 Meteosat 51 HESS telescopes 51 Lyman alpha 51 THAAD radar 51 Extreme Ultraviolet Imaging Spectrometer 51 gravitational lenses 51 tunable filter 51 polarimeter 51 Cartosat 2A 51 spectral measurements 51 optical spectroscopy 51 optical sectioning 51 radiometric measurements 51 gravity geophysical surveys 51 laser designator 51 NASA Moon Mineralogy 51 LRO LCROSS 51 Herschel telescope 51 MTSAT 1R 51 ERDAS creates 51 Alycia Weinberger 51 meteorological hydrological 51 Mercury exosphere 51 ASTER 51 Imaging Spectrometer MERIS 51 electro optic 51 PrintVision 51 Ranging spacecraft 51 neutral mass spectrometer 51 robotic lander 51 backscattering 51 DMSP satellites 51 nexgen 51 Mössbauer spectrometer 51 Neutron Detector 51 VASIMR 51 German SAR Lupe 51 spacecrafts 51 nanoscale patterning 51 Dyna Soar 51 X ray microanalysis 51 Comet Encke 51 UUVs 51 orbiting Hubble Space Telescope 51 teleoperated 51 EO IR sensors 51 spectral characteristics 51 tropospheric 51 LORRI 51 Imaging Spectrograph 51 Reflection Radiometer ASTER 51 optofluidic 51 Thermo Scientific LTQ Orbitrap 51 Trimble GNSS 51 Radar ASAR instrument 51 IceBridge 51 QCLs 51 YES2 51 robot locomotion 51 Keck Telescopes 51 HRTEM 51 GSLV rockets 51 Shackleton Crater 51 Mars orbiting spacecraft 51 HiRISE camera aboard 51 Kepler Mission 51 Gamma ray Large 51 TDRS K 51 lightwave 51 Explorer WISE 51 reentry capsule 51 KODAK CCD Image Sensors 51 Vexcel 51 Based Augmentation System 51 robotic explorers 51 A#AX platform 51 ESA Herschel 51 IXO 51 laser designators 51 Elevation Satellite 51 VLBI 51 HEO payload 51 meter diametre 51 antenna arrays 51 STEREO mission 51 Imaging Spectroradiometer 51 Delta Cephei 51 Mars CRISM 51 networks WSNs 51 Pluto Charon 51 InSb 51 OSRVT 51 Thermal Emission 51 UVIS 51 antineutrino 51 ARRL AMSAT 51 Clementine spacecraft 51 ESO Paranal Observatory 51 Program DMSP 51 Ray Spectrometer 51 wavefront sensor 51 Wide Angle Search 51 TecSAR 51 airborne observatory 51 satellite Giove 51 lunar equator 51 geomagnetism 51 Galilean satellites 51 Moon Mineralogy Mapper 51 NASA WMAP 51 infrared imaging 51 Energetic Particle 51 TRMM 51 Venusian atmosphere 51 Photometric 51 gravitational microlensing