Scattering of ultraviolet radiation in the resonant He I 584-A and O II 834-A lines in the upper atmosphere of Venus

Computer Science

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Electromagnetic Scattering, Planetary Radiation, Resonance Lines, Ultraviolet Spectra, Venus Atmosphere, Atmospheric Composition, Helium, Oxygen Spectra, Radiative Transfer, Upper Atmosphere, Venera 11 Satellite, Venera 12 Satellite

Scientific paper

A theoretical model is developed to analyze Venera 11 and 12 data on scattering in the He I 584-A and O II 834-A lines in the upper atmosphere of Venus. The appropriate theoretical curve was chosen from a set of solutions for various optical thicknesses with respect to scattering by means of the least squares method. Values of atomic-helium concentration of 450,000 per cu cm at a height of 145 km and of singly-ionized-oxygen concentration of 25,000 per cu cm at a height of 250 km have been obtained, which agree well with measurement data from the Pioneer-Venus probe.

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