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Information × Registration Number 0308U001658, 0107U000671 , R & D reports Title Optical properties of planetary bodies dust mantles popup.stage_title Фотометрія і поляриметрія Марса за допомогою космічного телескопа Хаббла Head Shkuratov Juriy Grigorovich, Registration Date 15-02-2008 Organization Kharkov Natuional university named after V.N.Karazin popup.description2 A new technique is polarimetric imaging observation of the Mars. The main idea is polarimetric imaging observation of Mars with the Hubble Space Telescope during the 2003 opposition. We report results of polarimetric imaging observations of Mars with the Hubble Space Telescope during the 2003 opposition. Through careful calibration, the observations with the ACS camera allow measurements of the polarization degree with an absolute accuracy better than 0.5% and detection of features with polarization degree contrast as small as 0.2%. The general distribution of linear polarization parameters over the Mars disk and their dependence on phase angle and wavelength are well explained qualitatively by a combination of scattering separately by the martian surface and atmosphere. We have discovered transient polarization phenomena interpreted as clouds that are best observed in ultraviolet light. These clouds are optically thin but strongly polarizing, and their origin may be related to atmospheric ice condensation processes. The winds of Mars at the water cloud level are measured by tracking cloud features in sequential high-resolution Hubble Space Telescope UV images. Global circulation model (GCM) predictions are in general agreement with the observations for the zonal wind component, but reveal significant differences for the meridional component. Product Description popup.authors popup.nrat_date 2020-04-02 Close