title: Venus: an isothermal lower atmosphere?
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 degrees +/- 20 degrees 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.
authors.forename: W
authors.initials: W
authors.lastname: Gale
authors.forename: M
authors.initials: M
authors.lastname: Liwshitz
authors.forename: A C
authors.initials: AC
authors.lastname: Sinclair