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V. S. Avduevsky
,
M. Ya Marov
,
M. K. Rozhdestvensky
,
N. F. Borodin
, and
V. V. Kerzhanovich

Abstract

A soft landing on the planet Venus was successfully accomplished by the automatic interplanetary station Venera 7. The temperature of the Venus atmosphere was measured during the descent and at the surface after landing. The variation of temperature and pressure with altitude on Venus was determined down to the surface by combining the temperature measurements with descent velocity derived from the Doppler shift data during the descent, and by considering the data collected previously during the flights of Veneras 4, 5 and 6.

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M. Y. A. Marov
,
V. S. Avduevsky
,
V. V. Kerzhanovich
,
M. K. Rozhdestevensky
,
N. F. Borodin
, and
O. L. Ryabov

Abstract

Measurements of the temperature, pressure and wind speed in the atmosphere of Venus are reported. These were obtained with the interplanetary station Venera 8, which was the first entry probe to telemeter data from the solar-illuminated side of Venus.

One component of the horizontal wind velocity was obtained, for the direction from the landing site to the sub-Earth paint,σ25° from the zonal direction. This component was found to decrease from σ100 m sec−1 at an altitude of 50 km to σ0 at the ground, with the direction of flow from the day side of the planet toward the night side at all altitudes.

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