Computer Science
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...203..768v&link_type=abstract
Science, vol. 203, Feb. 23, 1979, p. 768-770. Bundesministerium für Forschung und Technologie
Computer Science
7
Atmospheric Composition, Atmospheric Temperature, Thermosphere, Venus Atmosphere, Argon Isotopes, Carbon Dioxide, Helium, Mass Spectroscopy, Pioneer Venus Spacecraft, Venus, Thermosphere, Composition, Mass Spectrometers, Atmosphere, Pioneer Venus, Carbon Dioxide, Helium, Argon
Scientific paper
The neutral mass spectrometer on board the Pioneer Venus multiprobe bus measured composition and structural parameters of the dayside Venus upper atmosphere on 9 December 1978. Carbon dioxide and helium number densities were 6 x 10 to the 9th and 5 x 10 to the 6th per cubic centimeter, respectively, at an altitude of 150 kilometers. The mixing ratios of the both argon-36 and argon-40 were approximately 80 parts per million at an altitude of 135 kilometers. The exospheric temperature from 160 to 170 kilometers was 285 plus or minus 10 K. The helium homopause was found at an altitude of about 137 kilometers.
Hunten Don M.
Krankowsky Dieter
Mauersberger Konrad
Nier Alfred O.
von Zahn Ulf
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