Reports

Venus: An Isothermal Lower Atmosphere?

Science  30 May 1969:
Vol. 164, Issue 3883, pp. 1059-1060
DOI: 10.1126/science.164.3883.1059

Abstract

Use of Earth-based microwave data in extrapolating the atmospheric profile of Venus below the region probed by Mariner V and Venera 4 reveals an isothermal layer at 670° ± 20°K that extends to an altitude of 7 ± 2 kilometers. This model gives a value of 6054.8 kilometers for the radius of Venus, and agreement with brightness spectrum, radar cross sections, and results of microwave interferometry.

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