Preliminary results of measurements by automated probes VEGA 1 and 2 or particle concentration in clouds of Venus at heights 47-63 KM

Physics

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Aerosols, Particle Density (Concentration), Vega Project, Venus Atmosphere, Venus Clouds, Boundary Layers, Counters, Light Scattering, Particle Size Distribution

Scientific paper

Results of the preliminary processing of the Vega 1 and 2 descender data on the cloud layer structure of the Venusian atmosphere are discussed. A photoelectric counter for aerosol particles is described together with its optical and pneumatic circuits and operation algorithm. Vertical profiles of concentrations of particles with a diameter of 0.4 microns agree quantitatively with the Pioneer-Venus and Venera 9 and 10 data. Concentrations of these particles are: in the B layer, up to 190/cu cm; in the C layer, up to 10/cu cm; and in the D layer, up to 130/cu cm. Layers have sharp boundaries with a significant vertical heterogeneity of the aerosol concentration field inside them.

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