In this paper we have considered the features of estimating the extinction and backscattering coefficients of light, using laser sensing data at the wavelengths: 532 nm (elastic scattering, ES); 607 nm (vibrational-rotational Raman scattering, RS); 530 nm (pure-rotational RS). The main attention is paid to the errors in reconstructing the parameters of a two-component (molecules + aerosol) and three-component medium (molecules + aerosol + cloud) according to the atmospheric observations in September 2021.