The paper describes a method of extracting the aerosol scattering phase function from absolute scattering phase function of brightness, measured in solar almucantar in the total absence of clouds in the sky. The method is tested on archive observation data, obtained in semiarid region in southeast Kazakhstan in the visible spectral range. We present the results of calculating the directional aerosol scattering coefficients and the corresponding typical aerosol particle size distribution functions. It is shown that these functions are similar to the data for a station of Solar Village Baseline Surface Radiation Network, Saudi Arabia.
aerosol, solar radiation, spectral transmittance, inverse problem, radiation transfer equation, particle size distribution, phase scattering function