Spectrometric searching for the trace constituents in the atmospheric clouds on Venus

The clouds and haze in the Atmosphere of Venus are mainly composed of sulphuric acid aerosols but the presence of others components was also discussed from a long time. For instance there are suggestions in the literature that existence of dust is possible. The presented paper is continuation of our previous works and is directly connected with spectroscopic observations done by VIRTIS during Venus Express mission. The main purposes of the paper are: i ) A short review of the published articles related to the topic of presence the solid particles in the clouds over Venus ii) A description of numerical calculations and demonstration of modeled spectra of the total directional radiance which can help to recognize the optical characteristics of constituents of the atmosphere of Venus iii) A comparison the spectra measured by VIRTIS and numerically simulated by means of a radiation transfer model - discussion on recognition of solid constituent in the Venusian clouds