Change in Venusian atmosphere absorption coefficient with altitude

A method is given of directly determining the distribution of absorption coefficient kappa (h) as a function of height in the Venusian atmosphere by measurement of the amount of light striking a horizontal area both from above and from below over a broad range of wavelengths between 0.5 and 1.2 microns. Such measurements were performed by the Venera-9, Venera-10 and Pioneer-Venus spacecraft. Such measurement is sufficiently reliable, allowing direct determination of the volumetric absorption coefficient kappa (h) and complete restoration of the field of radiation in the deeper layes of the atmosphere, using the equations presented.