Anomalous scattering behavior of selected impact parabola features: Magellan cycle-to-cycle comparisons

Physics

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Backscattering, Magellan Spacecraft (Nasa), Parabolas, Planetary Craters, Planetary Mapping, Radar Data, Radar Scattering, Venus Surface, Emissivity, Planforms, Radar Imagery, Radar Maps, Synthetic Aperture Radar

Scientific paper

Magellan observations indicate that many venusian impact craters have associated surfaces, typically lower in backscatter and emissivity than the surroundings, that extend up to hundreds of kilometers to the west of craters, in parabolic planforms. During Magellan's second mapping cycle, a number of these parabolic features were imaged for a second time, under a different viewing geometry. In some cases, the SAR backscatter appearance of portions of the parabolic features was quite different in the two datasets. We present a description and preliminary interpretations of the anomalous appearance of these features as observed during Magellan's first and second mapping cycles.

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