Related by context. Frequent words. (Click for all words.) 52 interferometers 45 measurements 45 radar altimeter 45 sensor arrays 45 measurement 44 photometer 44 spectrographs 44 optical wavelengths 43 interferometric 43 microwatts 43 accuracies 43 photometric 42 radiometer 42 detectability 42 geoid 41 spectrometry 41 magnetic compass 41 amplitudes 41 calibration 41 magnetron 41 spectroscopy 41 interferometer 41 measuring 41 frequency comb 41 inertial navigation 41 picoseconds 40 transmitters 40 voltmeter 40 bioassays 40 quadrupole 40 sensors 40 LOFAR 40 satellites orbiting 40 entangled photons 39 elemental composition 39 sensor nodes 39 spectrophotometers 39 electromagnetic EM 39 photometry 39 frequency modulation 39 satellites 38 linearization 38 altimeters 38 ultrasonic sensors 38 laser rangefinder 38 gas chromatograph 38 metrological 38 diametre 38 calibrations 38 seismographic 38 geostationary satellites 38 isotopic 38 magnetic resonance NMR 38 SMOS 38 isotropic 38 spectroscopic 38 calibrating 37 sounders 37 fluidics 37 tokamak 37 electron density 37 GOCE 37 scramjet engine 37 interferometry 37 doppler 37 measurement instrumentation 37 astronomical observations 37 FT IR 37 electrocardiography 37 positional accuracy 37 tropospheric 37 spectrometers 37 GPS satellites 37 laser pulses 36 parameterization 36 detectors 36 spectra 36 capacitive sensors 36 silicon atoms 36 sensor 36 AUVs 36 kinematic 36 micrometre 36 redshifts 36 shorter wavelengths 36 z axis 36 Doppler radars 36 parasitic extraction 36 InSAR 36 infrared wavelength 36 spectrum analyzers 36 thermonuclear weapons 36 optical telescopes 36 anemometers 36 microscopy techniques 36 transoceanic 35 precision 35 millivolts 35 ultraviolet wavelengths 35 robotic explorers 35 impedances