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- W2038963650 abstract "Measurements in situ of the neutral composition and temperature of the thermosphere of Venus are being made with a quadrupole mass spectrometer on the Pioneer Venus orbiter. The presence of many gases, incluiding the major constituents CO(2), CO, N(2), O, and He has been confirmed. Carbon dioxide is the most abundant constituent at altitudes below about 155 kilometers in the terminator region. Above this altitude atomic oxygen is the major constituent, with O/CO(2) ratios in the upper atmosphere being greater than was commonly expected. Isotope ratios of O and C are close to terrestrial values. The temperature inferred from scale heights above 180 kilometers is about 400 K on the dayside near the evening terminator at a solar zenith angle of about 69 degrees . It decreases to about 230 K when the solar zenith angle is about 90 degrees ." @default.
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- W2038963650 date "1979-02-23" @default.
- W2038963650 modified "2023-09-23" @default.
- W2038963650 title "Venus Upper Atmosphere Neutral Composition: Preliminary Results from the Pioneer Venus Orbiter" @default.
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- W2038963650 doi "https://doi.org/10.1126/science.203.4382.770" @default.
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