Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...41...36k&link_type=abstract
Icarus, vol. 41, Jan. 1980, p. 36-64.
Astronomy and Astrophysics
Astronomy
7
Infrared Astronomy, Radiometers, Thermal Radiation, Venera Satellites, Venus Clouds, Aerosols, Brightness Temperature, Diurnal Variations, Limb Darkening, Mariner 10 Space Probe, Photochemical Reactions, Plancks Constant, Venera 10 Satellite, Venus, Venera 9, Venera 10, Radiometry, Thermal Radiation, Flux, Brightness Temperature, Temperatures, Latitudes, Diurnal Variations, Analysis, Aerosols, Comparisons, Experiments, Particles, Clouds, Concentrations, Albedo, Ground-Based Observations, Equipment, Data, Sp
Scientific paper
New data on the top clouds of Venus obtained during the radiometric experiment on-board the Venera 9 and 10 orbiters are presented. A diurnal component of the IR thermal radiation was determined for the latitude range -40, +50 deg; the brightness temperature of radiation referred to the normal was measured. Thermal radiation has no distinct latitudinal dependence but has a day-night symmetry, with the night radiation flux exceeding that on the day side by 17%. The analysis shows that the source function of the medium is close to Planck's function; during the day the flux of thermal radiation is weakened by an aerosol medium formed by photochemical processes. Experimental data and the results of ground-based measurements were used to determine the radiometric albedo of Venus.
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