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Information × Registration Number 0218U001466, 0116U000831 , R & D reports Title Mapping of optical, structural and chemical-mineralogical properties of the Moon using of space missions data popup.stage_title Head Vadym Kaydash, Registration Date 19-04-2018 Organization Kharkov National University named after V.N. Karazin popup.description2 Object of the investigations is the lunar surface. Subject of the research is optical, physical, structural and chemical-mineralogical properties of the lunar surface. Goal of the stage of the work is improvement of algorithms for photometric correction of images obtained by low-orbit spacecrafts. Methods of investigation are spectrometrical and photometrical, using theoretical analysis and computer simulation for interpreting the results. It is shown that all existing lunar global digital terrain models (for example, SELENE LALT DEM, SELENE DTM LISM, Chang'E-1 LAM DEM, LOLA, GLD100, SLDEM2015) have certain disadvantages (insufficient horizontal resolution and/or defects, and/or inconsistency of coordinate systems), which do not allow to take into account effectively the influence of topographic effects on LROC WAC photometric observations. A method based on photoclinometry for taking into account the influence of topographic effects on photometric data is proposed. To do this, our algorithm for obtaining the seamless photometric mosaics has been modified. It is shown, that the new method allows taking into account the influence of topography on photometric observations with maximum quality. Based on LROC WAC data, the opposition effect of brightness of the lunar surface was investigated. It was found that the slope of the phase curve at small phase angles is directly correlated with the albedo, while at the large phase angles inverse correlation is observed. The parameter "coherent backscattering width" is proposed to describe the coherent component of the lunar opposition spike. This parameter is defined as the maximum of the phase angle for which the slope of the opposition phase curve increases with the increasing albedo. The width of coherent backscattering spike varies from about 1.2° for highlands in red light to 3.9° for maria in blue light. The new parameter depends on albedo, which is in agreement with the coherent-backscattering theory. The maximum amplitude of the coherent opposition effect is estimated to be near 8%. The obtained results can be used in the planning and implementation of space missions to the Moon and other atmosphereless bodies of the Solar system by world space agencies. Product Description popup.authors В.В. Корохін В.Г. Кайдаш М.В. Опанасенко Ю.І. Великодський Ю.Г. Шкуратов popup.nrat_date 2020-04-02 Close