Related by context. Frequent words. (Click for all words.) 60 interferometric 59 frequency modulation 59 optical wavelengths 58 photometry 57 photometer 57 microwave frequencies 57 infrared wavelength 56 collimated 56 interferometers 56 redshifts 55 frequencies 55 keV 55 sideband 55 TerraSAR X 55 spectrally 55 WFC3 54 spectra 54 directional antennas 54 LOFAR 54 wavelengths 54 #.#GHz [001] 54 VIRTIS 53 ionospheric 53 WFPC2 53 opto mechanical 53 panchromatic 53 photometric 52 isotropic 52 modulation formats 52 GaN HEMT 52 visible wavelengths 52 infrared 52 near infrared NIR 52 photodetector 52 interferometry 52 fluorophores 52 infrared IR 52 Tunable 52 HD# [005] 52 antenna arrays 52 multispectral 51 #.#-#.# GHz [004] 51 GHz frequencies 51 auroral 51 MHz bandwidth 51 pulsed laser 51 spectrographs 51 InGaAs 51 THz 51 QPSK 51 optical telescopes 51 photoluminescence 51 photodiode 51 microwatts 51 emissivity 51 Spectrometers 51 #MHz #MHz [001] 51 transceiver modules 51 electromagnetic EM 51 diffracted 51 VCSELs 50 directional antenna 50 VLBI 50 amplitudes 50 synthetic aperture radar 50 radiometer 50 Spread Spectrum 50 Ku Band 50 crystal oscillator 50 transmitters receivers 50 basestations 50 DQPSK 50 transmitters 50 APDs 50 dispersive 50 solar corona 50 anisotropy 50 X ray emission 50 beam splitter 50 confocal 49 VHF UHF 49 VCOs 49 6GHz 49 #GHz [001] 49 sensor arrays 49 orthogonal frequency division multiplexing 49 Multimode 49 infrared wavelengths 49 ultraviolet wavelengths 49 HF bands 49 signal analyzers 49 synchrotron radiation 49 polarizations 49 morphologies 49 shorter wavelengths 49 microwave radiation 49 #,# GHz 49 irradiance 49 SBAS 49 active galactic nuclei 49 fluorescent probes