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ABSTRACT

Stewart 1968

Stewart, R.W., 1968: Interpretation of Mariner 5 and Venera 4 data on the upper atmosphere of Venus. J. Atmos. Sci., 25, 578-579, doi:10.1175/1520-0469(1968)025<0578:IOMAVD>2.0.CO;2.

Calculations have been completed on the structure of the ionosphere of Venus. Comparisons between these calculations and the results of the Mariner 5 and Venera 4 flights yield the following information on the structure of the Venus upper atmosphere: the ionosphere of Venus is of the F1 type; no more than 2% of the CO2 in the Venus ionosphere is dissociated; the relative abundance of N2 is ≤ 10%, in rough agreement with the Venus 4 limit of 7%; the exospheric temperature is 700°100K, the uncertainty in this result reflecting uncertainties in the CO2 vibrational deactivation coefficient and beating efficiency.

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