Impact crater related surficial deposits on Venus: Multipolarization radar observations with Arecibo
نویسندگان
چکیده
منابع مشابه
Impact crater related surficial deposits on Venus: Multipolarization radar observations with Arecibo
[1] The distribution of surficial deposits in the vicinity of impact craters on Venus was studied using measurements of the polarization properties of the reflected radar wave. Subsurface scattering of an incident circularly polarized radar signal results in a linearly polarized component in the radar echo due to the differing transmission coefficients at a smooth (at wavelength scales) atmosph...
متن کاملRadar-dark impact crater--related parabolas on Venus: Characterization of deposits with Magellan emissivity data
[1] We have analyzed the radar-dark parabola deposits associated with impact craters on the surface of Venus using the results of the Magellan radio experiments in both passive and active modes. The extent of mantle deposits is found to be much wider than the dark features observed in synthetic aperture radar (SAR) images. Using the emissivity data, we have classified features coinciding with t...
متن کاملSearching for Surficial Deposits on Venus Using Multi-polarization Radar
Introduction. The Magellan spacecraft returned hundreds of images of craters, radar-dark halos, and wind features on Venus. It is clear that surficial layers are associated with some of these features; for example, 59 of the craters have parabolic shaped deposits that are thought to be a few centimeters to a meter in thickness [1],[2]. Magellan also revealed about 400 radar dark “splotches” tha...
متن کاملDark Crater-related Deposits on Venus in Radar Cross-section – Emissivity Domain
Introduction: The population of Venus impact craters is rather small (about 1000). About 10% of all craters have distinctive associated dark diffuse features (DDF) like parabolas or halos. Such craters are thought to be the youngest on the planet [1,2]. The DDF are interpreted as surface deposits of loose material (dust) formed by the impact. DDF change their form with geological time and disap...
متن کاملCrater-associated dark diffuse features on Venus: Properties of surficial deposits and their evolution
[1] In order to assess the nature of crater-associated radar-dark diffuse features (DDFs) on Venus and to understand their formation and evolution, we analyzed Magellan radar roughness, emissivity, and reflectivity data in the vicinity of craters accompanied by these features. Following others, we assumed that DDFs are deposits (mantles) of ejected material emplaced during formation of the impa...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2004
ISSN: 0148-0227
DOI: 10.1029/2003je002227