Computer Science – Sound
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssi.....5..417s&link_type=abstract
Space Science Instrumentation, vol. 5, Dec. 1981, p. 417-428.
Computer Science
Sound
22
Dynamics Explorer Satellites, Mass Spectrometers, Satellite-Borne Instruments, Temperature Measurement, Wind Measurement, Data Processing, Ionospheric Sounding, Neutral Gases
Scientific paper
The Wind and Temperature Spectrometer, designed to measure the concentration, kinetic temperature, and motion (three mutually perpendicular components of the wind) of the neutral particles, is described, noting that measurements of the concentration and velocity of the ambient thermal ions are also possible. Two of the three wind components, the temperature and the concentration of the dominant constituent, can be measured to an altitude of approximately 650 km; the third component can be measured to about 375 km (estimated). Ion measurements can be taken throughout the orbit. The quadrupole mass spectrometer is the principal sensor for the instrument. Measurements of the zonal and vertical components of the wind are made by interpreting the modulation of the particle stream entering the mass spectrometer, induced by baffles that scan slowly (one vertically and one horizontally) in front of the entrance port of the mass spectrometer.
Carrignan G. R.
Hedin Alan E.
Maurer J. C.
Niemann Hasso B.
Spencer Nelson W.
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