Aerospace Instrument-Making Annotation << Back Two – wavelengths – two points method for determining of optical parameters of aerosol on measured sky brightness H.H. Asadov, D.Z. Aliyev, N.A. Abdullayev In the article the feasibility of carrying out of two – points diffuse – direct measurements of sun radiation – for aerosol optical parameters measurements is considered. It is shown, that accuracy of suggested method is increased due to removal of effect of multiple scattering, and also absence of necessity for absolute calibration of photometers.. Keywords: Aerosols, optical thickness, sky brightness, photometers, scattering. E-mail: asadzade@rambler.ru