Related by context. Frequent words. (Click for all words.) 68 radiometer 67 photometric 67 interferometric 65 CCD camera 65 spectrographs 64 near infrared NIR 64 spectrometer 64 spectrophotometer 64 Spectrometer 63 interferometers 63 interferometry 63 photometry 62 XMM Newton 62 interferometer 62 spectroscopic 62 spectrometers 62 spectrophotometers 61 radar altimeter 61 ionisation 61 WFC3 61 imager 60 FT IR 60 scintillation 60 reflectance 60 collimator 60 STIS 60 gas chromatograph 60 transmission electron microscope 59 multispectral 59 particle detector 59 ultraviolet 59 frequency comb 59 Fluorescence 59 optical wavelengths 59 Raman spectroscopy 58 X ray telescope 58 spectrometry 58 keV 58 photodetector 58 spectrograph 58 SMOS 58 absorbance 58 visible wavelengths 58 spectroscopy 58 confocal 58 Cosmic Origins Spectrograph 58 InGaAs 58 optical telescope 58 emissivity 58 ultraviolet UV 58 mass spectrometer 58 optical microscopy 58 adaptive optics 58 infrared IR 57 infrared 57 infrared telescope 57 elemental composition 57 radial velocity 57 solar corona 57 fluorophores 57 brightness 57 NICMOS 57 infrared spectroscopy 57 photocell 57 quadrupole 57 optical microscopes 57 ionization 57 Cepheids 57 X ray emission 57 interplanetary spacecraft 57 beamline 57 COROT 57 FRET 56 infrared wavelengths 56 spectra 56 X ray fluorescence 56 photodiode 56 detector 56 Tunable 56 luminous flux 56 VLBA 56 infrared spectrometer 56 particle detectors 56 diffraction 56 Very Large Telescope 56 ionizing 56 HiRISE camera 56 WFPC2 56 shorter wavelengths 56 ESO Very Large Telescope 55 MeV 55 microwave radiation 55 LROC 55 MALDI 55 OSIRIS 55 infrared rays 55 pulsed laser 55 radioactive tracer 55 Resolution Imaging 55 attosecond 55 infrared radiation