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Information × Registration Number 0306U001543, 0103U000665 , R & D reports Title Astrophysical research of the planets' surfaces and atmospheres according to the data of photometry and polarimetry popup.stage_title Розробка інтерпретаційної бази результатів фотометрії та поляриметрії Місяця та Юпітера Head Korokhin Victor Valentinovich, Registration Date 20-04-2006 Organization Kharkov national university named after V.N. Karazin popup.description2 Objects of investigations are the lunar surface and Jovian atmosphere. Goal of the work is research of optical properties of planets atmospheres and surfaces. Methods of investigation are photometrical and polarimetrical, using theoretical analysis of data, theoretical and digital modeling the processes of light scattering on planets surfaces and in atmospheres. A procedure of posteriori correction of the data of integral photometry of the Moon carried out by Lane and Irvine [1] and Rougier [2] has been developed. This procedure allows one to decrease regular errors of integral phase curves related to the libration variations. On the base of corrected data it has shown that for relatively small phase angles (16°-43°) decreasing the phase slope m with increasing the phase angle is observed. For middle and large phase angles (41°-120°) the parameter m is constant and is equal to 0.7. It means that at relatively small phase angles phase dependence is formed substantially by micro-topography, at large phase angles the phase dependence is mainly formed by meso-topography. It was shown that slope of integral lunar spectrum is changed nonmonotonicly with phase angle varying: there are minimum near 10° and maximum near 55°. For approximation of phase curves of integral albedo in the range 6° Ј a Ј 120° we propose the following formula. Absolute photometrical observations of the Moon with solar calibration have been carried out in 4 spectral bands at phase angles 45-120°. Data of lunar absolute photometry of 1986-87 years in 3 spectral bands at phase angles 0.8-45° have been processed. Absolute values of reflectances of 73 lunar areas and phase dependence's parameters of 22 areas have been obtained and have become a base of new photometric catalogue. This catalogue has a good agreement with Sytinskaya-Sharonov's photometrical system, whereas the Clementine's system yields too high albedos. The results may be used to test theoretical models of light scattering by lunar surface and for recalibration of Earth-base and space spectrophotometric observations. Studying the correlation links between spectral characteristics of lunar soil and chemical and mineralogical composition using the "LSCC" data is started. Multiple linear regression and artificial neural networks were used for this. Conclusion about availability of artificial neural networks for prediction of chemical and mineralogical composition using spectroscopy has been made. Polarimetric observations of Jupiter near opposition have been carried out. The data of these observations are in processing now. The algorithm for building maps of intensity and polarization for studying of thin structure of distribution of these parameters has been developed and realized. Old data of observations (1981-1998) has been reprocessed using new better technique. The data from other observers have been added to the analyze process. Sign anticorrelation between asymmetry of polarization and insolation has been found. The mechanism of influence of seasonal variations on north-southasymmetry of polarization formation (through temperature variations) has been proposed. It is noted there is possibility of existence of influence of irregular factors (solar cosmic rays stream) on polarization value. An algorithm for light scattering calculations in multi-component medium has been developed. The developing of models of light scattering by Jupiter's stratospheric aerosol haze and cloud layer has been started. Development of program complex xIRIS is continuing: system kernel has been improved, many new applied procedures have been developed. Relational database of PPR from Galileo spacecraft and utilities for comfortable and efficient work with it have been developed. Product Description popup.authors popup.nrat_date 2020-04-02 Close