Sulfuric acid in Venusian atmosphere determined from radio opacity data

Details Sulfuric acid in Venusian atmosphere determined from radio opacity data Sulfuric acid in Venusian atmosphere determined from radio opacity data

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rpsct...2...35m&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 35 (SEE N91-20154 12-12) Transl. into ENGLISH from Kosmicheskiye Issle

Astronomy and Astrophysics

Astronomy

Atmospheric Composition, Opacity, Planetary Atmospheres, Radio Waves, Sulfuric Acid, Venus Atmosphere, Absorbents, Atmospheric Temperature, Centimeter Waves, Northern Hemisphere, Radiation Absorption, Radio Astronomy, Radio Attenuation, Venera Satellites, Venus (Planet)

Scientific paper

A study was made of the attenuation of centimeter radio waves in the polar and near polar atmosphere of the near-polar atmosphere of the Venusian Northern Hemisphere from altitudes of 47 to 80 km. The distribution of absorbent in the planetary middle atmosphere was also sought. The research was based on the results of measurements of the amplitude of centimeter and decimeter radio waves emitted by the Venera 15 and 16 vehicles during radio opacity studies of five regions of the planetary atmosphere between latitudes of 71 and 85.5 degs at solar zenith angles of between 95.4 and 109 degs (nighttime atmosphere). The average radius of Venus was taken as a = 6.051 km. At an altitude of 61 km, the integral absorption was -2.4 dB; at 55 dm, -0.6; and at 47 km, -5.8 dB. Data were obtained on the absorption of radio waves at both lambda = 5 cm and lambda = 13 cm for altitudes attributable to sulfuric acid vapor. The distribution of H2SO4 vapor at altitudes 39 to 53 km was determined. At 39 to 44 km altitude, the content of H2SO4 vapor is slightly dependent on altitude and is = to 37 + or - 7 ppm. With an increase in altitude above the Venusian surface from 45 to 53 km, it is 20 + or - 5 ppm.

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