Subsurface radar sounding of the south polar layered deposits of Mars.
作者： J. J. Plaut , G. Picardi , A. Safaeinili , A. B. Ivanov , S. M. Milkovich
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摘要: The ice-rich south polar layered deposits of Mars were probed with the Advanced Radar for Subsurface and Ionospheric Sounding on Express orbiter. radar signals penetrate deep into (more than 3.7 kilometers). For most area, a reflection is detected at time delay that consistent an interface between substrate. reflected power from this indicates minimal attenuation signal, suggesting composition nearly pure water ice. Maps generated topography basal thickness deposits. A set buried depressions seen within 300 kilometers pole. map shows asymmetric distribution regions anomalous thickness. total volume estimated to be 1.6 x 10(6) cubic kilometers, which equivalent global layer approximately 11 meters thick.
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