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(Click for frequent words.) 68 NIRCam 66 microshutters 63 VIIRS 63 Near Infrared Camera 62 ESO VLT 62 TEGA ovens 62 IBEX spacecraft 62 hexagonal mirrors 62 interferometric 62 Lunar Reconnaissance Orbiter Camera 62 hyperspectral imager 61 APXS 61 GLAST Burst Monitor 61 SIRAL 61 EPOCh 61 Spectrograph 61 D CIXS 60 NASA STEREO 60 Faint Object 60 NASA Stratospheric Observatory 60 spectrographs 60 photometer 60 Rosetta orbiter 60 Multi Object Spectrograph 60 planetary Transits 60 Cosmic Origins Spectrograph COS 60 O OREOS 60 Fermi telescope 60 FORCAST 60 indium gallium arsenide InGaAs 59 ST5 59 retroreflector 59 BepiColombo 59 ESA Herschel 59 Orbiter LRO 59 Pancam 59 interferometers 59 QWIP 59 Astrosat 59 Adaptive optics 59 JWST 59 interferometer 59 WISE infrared 59 Suite VIIRS 59 ChemCam 59 THEMIS satellites 58 Hubble Space Telescope HST 58 Moon Mineralogy Mapper M3 58 Cloud Aerosol Lidar 58 ExoMars rover 58 Spitzer infrared 58 GALEX 58 photometers 58 Imaging Spectrometer 58 Lunar Reconnaissance Orbiter LRO 58 fluorescence microscope 58 neutral mass spectrometer 58 X ray spectrometer 58 GIOVE B 58 X ray wavelengths 58 Convection Rotation 58 Planck satellite 58 rotaxanes 58 SWIR cameras 58 infrared spectrometers 58 Solar Optical Telescope 58 Raman spectrometer 58 Ultraviolet Optical Telescope 58 Solar TErrestrial RElations Observatory 58 airborne observatory 58 VIRTIS 58 confocal microscope 58 hyperspectral sensors 58 LIGO 58 ESA Planck 58 SECCHI 58 Synthetic Aperture Radar 58 Burst Alert 57 JCMT 57 multiwavelength 57 spectroscope 57 Magnetic Imager HMI 57 Phoenix Microscopy Electrochemistry 57 CrIS 57 collimators 57 Mastcam 57 Long Wavelength Array 57 Instrument Module 57 Helioseismic 57 UKIRT 57 KODAK CCD Image Sensors 57 Infrared Pathfinder Satellite 57 monochromators 57 photon counting 57 backscattered 57 astronomical telescopes 57 spectrographic 57 Infrared Astronomy 57 SBSS satellite 57 nanostructured solar 57 Thermal Emission Spectrometer 57 Spitzer infrared spectrograph 57 detect gravitational waves 57 ATLAS detector 57 optical wavelengths 57 situ measurements 57 NanoSIMS 57 Keck telescopes 57 Cosmic Origins Spectrograph 57 optical telescope 57 scanning electron microscopes 57 TanDEM X 56 Mars Color Imager 56 optical waveguides 56 Laser Interferometer Gravitational Wave 56 multiphoton 56 VLTI 56 gravitational wave 56 polarimetry 56 Telescope BAT 56 Keck Interferometer 56 Micro Epsilon 56 Mössbauer 56 imaging spectrometer 56 Array ALMA 56 Philae lander 56 lasers modulators 56 Mid Infrared 56 interplanetary spacecraft 56 detect gamma rays 56 WISE spacecraft 56 Galileo satellites 56 millimeter wavelengths 56 Planck telescope 56 Steward Observatory 56 infrared observatory 56 detector arrays 56 micromirror 56 Interferometric 56 NASA Cosmic Background 56 HRTEM 56 Microscopy Electrochemistry 56 SIRTF 56 infrared ultraviolet 56 COROT 56 gamma ray detector 56 JDEM 56 Alpha Particle 56 GEO# 56 micromachined 56 EVLA 56 ultrahigh resolution 56 fainter objects 56 diffraction gratings 56 Neutral Mass Spectrometer 56 Mars Climate Sounder 56 orbiting gamma ray 56 laser altimeter 56 diffraction pattern 56 Context Camera 56 shortwave infrared 56 Infrared Camera 56 Infrared Thermal Imaging Spectrometer 56 Nanoindentation 56 neutron spectrometer 56 Sunshield 56 spectrometer 56 DEIMOS 56 Mössbauer spectrometer 56 SSETI Express 56 scintillator 56 Solar Orbiter 56 radio occultation 56 lenses prisms 56 photomultiplier tubes 56 Mini Thermal Emission 55 Relations Observatory STEREO 55 Foton M2 55 Spectrometers 55 XMM Newton X ray 55 hyper spectral 55 cryo electron microscope 55 Stratospheric Observatory 55 EDXRF 55 Force Microscopy 55 starboard SARJ 55 NuSTAR 55 optical lattices 55 SQUIDs 55 interferometry 55 LOFAR 55 correlation spectroscopy 55 astronomical telescope 55 visit http:/saturn.jpl.nasa.gov 55 telescope 55 Tropospheric Emission Spectrometer 55 Optical Spectroscopic 55 Terrestrial Planet Finder 55 Herschel Planck 55 EarthCARE 55 THz radiation 55 Proba 55 piezoelectric sensors 55 particle analyzers 55 flyby spacecraft 55 NFIRE 55 nanodevice 55 Bessel beam 55 X ray telescopes 55 Jupiter Ganymede 55 terahertz waves 55 lidar instrument 55 geosynchronous satellites 55 Yinghuo 1 55 Multi Object Spectrometer 55 Photometric 55 Nasa spacecraft 55 GLAST 55 ExoMars mission 55 IKAROS 55 Mini SAR 55 SensL 55 Planck spacecraft 55 Adaptive Optics 55 Webb Telescope 55 widefield 55 Heterodyne Instrument 55 distant quasars 55 radiometers 55 Submillimeter 55 KamLAND 55 onboard Chandrayaan 55 Phased Array 55 orbiting observatories 55 parabolic trough collectors 55 ExoMars Trace Gas 55 NASA Solar Terrestrial 55 Observatory STEREO 55 spacecraft 55 wideband RF 55 Conductivity Analyzer 55 polarimeter 55 diffraction patterns 55 particle detector 55 deconvolution 55 monochromator 55 Reflection Radiometer 55 Giove B 55 Atacama Large Millimeter Array 55 WFC3 55 visible wavelengths 55 photonic crystal 55 ultraviolet imaging spectrograph 54 Light Microscopy 54 linearly polarized 54 millimeter wave radar 54 Descent Imager Spectral Radiometer 54 Submillimeter Array 54 wavefront sensing 54 Kepler Mission 54 microlenses 54 Spectroscopic 54 spectroscopic observations 54 AKARI 54 quantum cascade laser 54 SSRL 54 infrared spectra 54 circular polarized 54 Observatory SDO 54 airglow 54 infrared detector 54 infrared 54 X ray pulses 54 Skynet 5C 54 Hubble Space telescope 54 UK DMC2 54 fluorescent nanoparticles 54 MeerKAT 54 multispectral 54 Conductivity Analyzer MECA 54 VASIMR engine 54 Infrared Astronomy SOFIA 54 RazakSAT 54 synthetic aperture 54 multiband imaging photometer 54 Solar Sail 54 absorption spectra 54 photodetector 54 CubeSat 54 spectroscopic analysis 54 Huygens Probe 54 fluorescence detector 54 infrared telescopes 54 nanosatellites 54 spectral bands 54 radiometer 54 gamma ray observatory 54 Synthetic Aperture Radar SAR 54 ion traps 54 confocal 54 Metamaterial 54 electro optical sensor 54 frequency combs 54 Advanced LIGO 54 OPTEK 54 Kibo JPM JEM Pressurized 54 emit electromagnetic waves 54 parabolic antenna 54 submillimetre 54 synchrotron X ray 54 submillimeter 54 microgravity experiments 54 Planetary Fourier Spectrometer PFS 54 Cosmic Background Explorer 54 exoplanetary 54 ESA Integral 54 Shallow Subsurface Radar 54 radar altimeter 54 MINOS 54 LRO 54 heliostat 54 mercury cadmium telluride 54 Composite Infrared Spectrometer 54 enters lunar orbit 54 SINFONI 54 hyperspectral 54 Doppler measurements 54 gradiometer 54 GEO satellites 54 Gran Telescopio Canarias 54 STEREO spacecraft 54 infrared spectral 54 Kibo module 54 TDRS K 54 NASA EPOXI mission 54 optical microscopes 54 Herschel telescope 54 Mossbauer spectrometer 54 lunar orbiting spacecraft 54 Instrument OMI 54 Orbital Express 54 Aerosol Polarimetry Sensor 54 microscopic imager 54 Large Binocular Telescope 54 Satellites GOES 54 photonic circuits 54 absorption spectroscopy 54 UVIS 54 ASKAP 54 VIRTIS instrument 54 Teledyne Imaging 54 Fabry Perot 54 HESS telescopes 54 #mb PowerBook G4 54 Profiler Suite OMPS 54 Hubble gyroscopes 54 Plasmonic 54 sub millimeter wavelengths 54 LROC 54 Sofradir 54 gamma ray photons 54 confocal laser scanning 54 MetOp 54 Interferometer 54 Heliospheric 54 radar lidar 54 X ray absorption spectroscopy 53 Beamline #.#.# 53 geo synchronous 53 HiRISE image 53 Magnetospheric 53 EPOXI 53 NanoSail D 53 Multispectral 53 terrestrial concentrator 53 HiRISE camera 53 bolometers 53 shepherding spacecraft 53 infrared radiation 53 gamma ray spectrometer 53 optical interferometry 53 Nasa Mars Reconnaissance 53 Extrasolar Planet Observation 53 photoelectron spectroscopy 53 Earth orbiting satellites 53 microlens 53 Mars landers 53 Electron Microscope 53 microspectrophotometer 53 Fresnel lenses 53 nanoantennas 53 qdots 53 scatterometer 53 absorbs photons 53 Mars Orbiter 53 Fregat upper stage 53 spacecraft orbiting 53 Proba 2 53 submillimeter wavelengths 53 SMOS 53 confocal scanning 53 frequency comb 53 Hubble Servicing 53 including nanotechnology microsystems 53 SPHERES 53 High Resolution Imaging 53 CCD detector 53 SSPTS 53 corneal topography 53 Mass Spectrometer 53 ion microprobe 53 nanostructured silicon 53 FLIR Forward Looking 53 modules inverters 53 STSS satellites 53 infrared spectrograph 53 Nikon D# Kowa 53 MARSIS 53 gamma ray detectors 53 terahertz frequencies 53 optical telescopes 53 ESA SMART 53 Collider Detector 53 microlens array 53 ADM Aeolus 53 optical sectioning 53 ions electrically charged 53 LRO spacecraft 53 photonic crystals 53 ESTEC 53 Planetary Transits 53 SIM PlanetQuest 53 #x magnification [002] 53 emit photon 53 infra red sensor 53 TSQ Quantum 53 Foveon X3 53 planetary nebulas 53 UAVSAR 53 orbiter lander 53 x ray fluorescence 53 eyepiece #/#s f/#.# 53 rubidium vapor 53 TerraSAR X 53 metamaterial structures 53 Mossbauer 53 Terrain Mapping Camera 53 Mars Pathfinder lander 53 XMM Newton 53 Total Ozone Mapping 53 infrared imager 53 infrared wavelengths 53 LORRI 53 ESA ERS 53 Telescope LSST 53 UCO Lick 53 coronagraph 53 CALIPSO 53 radome 53 ultrasonic sensors 53 Delfi C3 53 fluorescent molecules 53 microwave frequencies 53 photolithographic 53 ultraviolet spectrograph 53 Aboard Endeavour 53 Thermo Scientific Nicolet 53 Cryosat 53 PowerBox 53 microfluidic chip 53 ENVISAT 53 X ray observatory 53 heliostats 53 cryostat 53 Gas Chromatograph Mass Spectrometer 53 optical microscopy 53 ESA XMM Newton 53 CBERS 2B 53 Analyzer TEGA 53 Main Injector Neutrino 53 hyperlens 53 FT IR spectrometer 53 Free Electron Laser 53 HEO payloads 53 Foton spacecraft 53 sunshield 53 LCLS 53 NASA Far Ultraviolet 53 NFIRE satellite 53 Solid Rocket Boosters 53 Transmission Electron Microscope 53 stellar occultation 53 NASA Goddard 53 scintillators 53 OMPS 53 NASA twin STEREO 53 adaptive optics 53 antireflective coating 53 chlorophyll molecules 53 Nova NanoSEM 53 Kibo pressurized 53 GLAST telescope 53 Keck Telescope 53 Galileoscope 53 infra red sensors 53 SkySat 53 Robotic Arm 53 diffracted 53 diffract 53 nanosatellite 53 aberration correctors 53 Characterization EPOCh 53 X ray Spectrometer 53 LISA Pathfinder 53 infrared telescope 53 Axio Imager 53 HIRES spectrometer 53 Gravitational lensing 53 Keck telescope 53 beamline 53 lightwaves 53 ASTRON 53 lensless imaging 53 polarimetric 53 darkfield 53 neutrino detectors 53 EO IR sensor 53 Targeting Forward Looking 53 NASA THEMIS 53 TSN PZ camera 53 terahertz THz 53 UV VIS 53 evanescent waves 53 submillimetre wavelengths 53 Mars Descent Imager 53 Scatterometer 53 ion thrusters 53 microlensing events 53 Japanese Kibo laboratory 53 correlator 53 InGaAs 53 Miniaturized 53 Mini TES 53 plasmons 53 Mars Surveyor 53 ARCTUS 53 earth orbiting satellites 53 deformable mirrors 53 Hyperspectral 53 Mars Orbiter Camera 53 infrared astronomy 52 MESSENGER MErcury Surface 52 Ulysses spacecraft 52 electric ion propulsion 52 ALMA antennas 52 Extreme Ultraviolet Imaging Spectrometer 52 UV Visible 52 rover panoramic 52 Chajnantor plateau 52 Magnetic Imager 52 Nuclear Spectroscopic Telescope Array 52 Greenbelt Md. manages 52 astrometric 52 CARTOSAT 2A 52 SKA telescope 52 synthetic aperture radar 52 Deep Impact eXtended Investigation 52 Muchachos Observatory 52 infrared interferometry 52 nanotubes nanowires 52 Area Telescope LAT 52 Laser Interferometer Space 52 rotationally symmetric 52 spectroscopic 52 http:/www.nasa.gov/cassini 52 aperture telescope 52 Diviner 52 interferogram 52 LADEE 52 wavelength infrared 52 infrared illuminators 52 ARGUS IS 52 EPOXI mission 52 Orbital Debris 52 gravitationally lensed 52 Japan Kibo laboratory 52 opto mechanical 52 parabolic dish 52 Fourier transform infrared 52 Resolution Imaging 52 NASA Wilkinson Microwave 52 x ray pulses 52 particle detectors 52 collimated 52 diffraction grating 52 optical spectra 52 Raman microscope 52 impactor spacecraft 52 Suzaku X ray 52 OMS pods 52 LTQ Orbitrap 52 MARSIS radar 52 propellant tanks 52 nondestructively 52 antineutrino 52 deorbiting 52 YES2 52 Atacama Large Millimeter submillimeter 52 gamma ray telescope 52 GOCE 52 Thermo Scientific LTQ Orbitrap 52 Mauna Kea Hawaii 52 Galaxy Evolution 52 electro optical EO 52 ESA Envisat 52 geoneutrinos 52 micro electromechanical 52 DIXI 52 spectral imaging 52 Evolution Explorer 52 tokamak 52 Exoscan 52 Galileo constellation 52 workcells 52 electro optic sensors 52 Boston Micromachines 52 spectro 52 Xenics 52 Epsilon Eridani 52 Robotic Arm Camera 52 array AESA 52 nanotube transistor 52 RHESSI 52 Rosetta spacecraft 52 shortwave infrared imaging 52 orbiting Hubble Space Telescope 52 http:/saturn.jpl.nasa.gov 52 radiotelescope 52 opto electrical 52 Anisotropy Probe WMAP 52 orbiter 52 Planetary Camera 2 52 deformable mirror 52 absorbs ultraviolet 52 micromirrors 52 Aerojet propulsion 52 nanofabricated 52 crystalline silicon photovoltaic 52 photoelectron 52 RS Ophiuchi 52 Climate Experiment SORCE 52 NSOM 52 STSS Demo 52 Antenna LISA 52 robotic Canadarm 52 Dektak 52 Mars Reconnaissance Orbiter MRO 52 eclipsing binary 52 geostationary earth 52 neutron beam 52 HEO payload 52 Lovell Telescope 52 optomechanical 52 Space Infrared Telescope 52 Keck Telescopes 52 Infrared Remote 52 NASA Gamma ray 52 NASA Lunar Reconnaissance 52 micromechanical 52 superlenses 52 Uninhabited Aerial Vehicle 52 ROCSAT 2 52 HCPV panels 52 fluorescence spectroscopy 52 X ray diffraction XRD 52 STEREO mission 52 Wilkinson Microwave Probe 52 Satellite GOSAT 52 Hubble Near Infrared 52 AMPERE 52 scanning optical microscopy 52 NEOWISE 52 quantum cascade 52 HiRise camera 52 C1XS 52 laser designator 52 Subaru telescope 52 micrometer scale 52 laser interferometers 52 Focal Plane Array 52 ESA Huygens probe 52 magnetic coil 52 Fraunhofer IPMS 52 binary asteroid 52 powder diffraction 52 Diviner instrument 52 WISE telescope 52 collimating 52 millimeter wavelength 52 inch Samuel Oschin 52 Moessbauer spectrometer 52 Smos 52 UVOT 52 ROSAT 52 Arecibo telescope 52 Infrared Mapping Spectrometer VIMS 52 Launch Abort System 52 chemiluminescence 52 ultrashort pulses 52 micromachine 52 Atmospheric Infrared Sounder 52 Highly Adaptable Satellite 52 optical microscope 52 Spectrometer 52 robotic telescopes 52 Lockheed Martin Waterton Canyon 52 Zecotek MAPD 52 SDSS II 52 parabolic troughs 52 tumbleweed rover 52 antineutrinos 52 Gravity Probe B 52 Curiosity rover 52 Energetic Particle 52 geosynchronous satellite 52 docking compartment 51 infrared emitters 51 steering wheel tilts 51 nanomechanical 51 ESO telescope 51 Advanced Synthetic Aperture 51 Phased array 51 millimeter wave MMW 51 Forschungszentrum Dresden Rossendorf FZD 51 lunar landers 51 Globalstar satellites 51 DISR 51 Large Synoptic Survey 51 WMAP satellite 51 Synthetic Aperture 51 silicon waveguide 51 High Flux Isotope 51 LightTools 51 CBERS 51 Microwave Imaging Radiometer 51 photodiode array 51 ESA Cluster 51 gravitational lens 51 spectrometers 51 nEUROn 51 photosensor 51 miniaturized sensors 51 twin STEREO spacecraft 51 Express orbiter 51 linear Fresnel 51 Sojourner Rover 51 tunable filter 51 superlens 51 STIS 51 VISTA telescope 51 Tevatron experiments 51 lander rover 51 robotic lander 51 surface plasmons 51 ESO PR 51 interferometric technique 51 shorter wavelengths 51 SolarEagle 51 retroreflective 51 ChIP chip 51 GOCE satellite 51 RGB pixels 51 NASAs 51 L5 signal 51 thermopile 51 multispectral imaging 51 orbiting telescopes 51 wavelength tunability 51 photon fluorescence 51 INMS 51 High Concentration Photovoltaic 51 Absorption Spectroscopy 51 Glonass K 51 panchromatic camera 51 fundus camera 51 laser optics 51 spectral measurements 51 El Mul 51 Ariane launcher 51 fluorescence excitation 51 gamma ray observatories 51 Sojourner rover 51 HIAPER 51 x ray beam 51 photometry 51 Herschel Space Telescope 51 supergiant star 51 MWIR 51 holographic telepresence 51 eyepieces 51 silicon nanowire 51 Entangled photons 51 Arecibo radar 51 scanning tunneling microscopes 51 radar interferometry 51 VIS NIR 51 laser altimetry 51 GLAST spacecraft 51 Infrared Astronomical Satellite IRAS 51 RXTE 51 electrospray ionization 51 Orbiter MRO 51 Compact Reconnaissance Imaging Spectrometer 51 scramjet engines 51 ultraviolet wavelengths 51 IBEX Lo 51 IR LEDs 51 undulator 51 electro optic 51 shearography 51 geosynchronous orbit GEO 51 Pegasus XL 51 cosmological distances 51 Heliospheric Investigation 51 FalconSat 2 51 Leonardo Permanent Multipurpose 51 plasmonic devices 51 Thermal Emission 51 Elektron oxygen generation 51 Dynamic Light Scattering 51 infrared laser beams 51 Space ENvironment GEochemistry 51 graphite epoxy 51 micrometre 51 CDMS II 51 hypervelocity 51 Single Photon Emission Computed 51 terahertz radiation 51 multispectral imager 51 Jules Verne ATV 51 ionised gas 51 scanning electron microscope SEM 51 Fourier transform infrared FTIR 51 APEX telescope 51 scramjet 51 Imaging Spectrometer MERIS 51 exoatmospheric kill vehicle 51 Foton M3 51 robotic explorer 51 efector 51 micrometres thick 51 Mars CRISM 51 Cubesat 51 Libra constellation Vogt 51 Radar G ATOR 51 Nasa Kepler 51 Ocean Salinity 51 Inertial Navigation System 51 bolometer 51 smallest exoplanet 51 constellation Carina 51 Photonic crystals 51 Multibeam 51 Infrared Array Camera 51 SOHO spacecraft 51 THEMIS 51 XMM Newton satellite 51 Mission TRMM 51 Io Europa 51 X ray microanalysis 51 nanomanipulation 51 infra red imaging 51 inertial sensor 51 NASA WMAP 51 unstowed 51 Exmor ™ 51 beam combiner 51 curved mirrors 51 ultrasonic transducers 51 NOvA 51 Ion Beam 51 SSMEs 51 gamma rays X rays 51 airborne lidar 51 ASPERA 51 SpaceWire 51 gamma ray telescopes 51 X ray microscopy 51 SpaceshipTwo 51 JIMO mission 51 Mission SRTM 51 multipin 51 beamlines 51 wavefront sensor 51 telescopes 51 nanolaser 51 nanoindentation 51 wavelengths 51 STORRM 51 Phobos Grunt 51 Cassini Huygens 51 SMOS satellite 51 Guidance Sensor 51 Very Large Telescope 51 thermal infrared 51 Gamma ray Large 51 infrared wavelength 51 E ELT 51 muon neutrino 51 galvo 51 Z Backscatter X ray 51 IceCube Neutrino Observatory 51 magnetic spectrometer 51 SPIRE 51 Optical Telescope 51 Fluorescence 51 spectral fingerprint 51 DualBeam 51 Lunar Exploration 51 LOCAD PTS 51 indium gallium arsenide 51 LRO LCROSS 51 Mars Odyssey Orbiter 51 Vehicles Directorate 51 spaceborne 51 Strain Gauge 51 collimator 51 neutron radiation 51 QuantumFilm 51 Astrophysical Research 51 EKV 51 Flyby spacecraft 51 M3D 51 SMOS mission 51 infrared sensing 51 Kibo robotic arm 51 Climate Experiment GRACE 51 SPICAM 51 fluorescence imaging 51 irregularly shaped asteroid 51 crystalline photovoltaic 51 meta atoms 51 OP# [003] 51 Shuttle Discovery docks 51 Fundamental Aeronautics Program 51 ESOC 51 CHIPSat 51 amateur astronomers peering 51 Interferometer VLTI 51 RX1 51 aboard Envisat 51 Payloads 51 nanosensor 51 laser interferometer 51 SMOS Soil Moisture 51 maritime subsurface 51 Telescope Array 51 diffractive 51 F/A-#E/F aircraft 50 Binary Colloidal Alloy 50 femtosecond pulse 50 multispectral images 50 GMRT 50 fluorescent probes 50 orbit GEO 50 Geminga 50 Infrared Sensor 50 Electro optical 50 NPOESS Preparatory Project 50 radiosondes 50 electron diffraction 50 APiX 50 confocal microscopes 50 CompactDAQ 50 HARPS instrument 50 Photonic Crystals 50 Confocal 50 magnetospheres 50 NASA Landsat 50 Huygens mission 50 NASA Orbiting Carbon 50 SPECTRO 50 Fujifilm Face Detection 50 Helmet Mounted Display 50 Fluorescent proteins 50 Hubble Telescope 50 trans rectal 50 astronomical objects 50 NASA Cassini 50 Arecibo Observatory 50 cholesteric liquid crystals 50 HiRISE 50 electron microprobe 50 heliospheric 50 electromagnetic coils 50 correlative microscopy 50 piezoelectric transducer 50 datalogger 50 resolution panchromatic