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Magellan: Electrical and Physical Properties of Venus' Surface | | G Leonard Tyler
; Peter G Ford
; Donald B Campbell
; Charles Elachi
; Gordon H Pettengill
; Richard A Simpson
; | | Date: |
12 Apr 1991 | | Journal: | Science, 252 (5003), 265-270 | | Abstract: | Magellan probes Venus’ surface by 12.6-cm-wavelength vertical and oblique radar scattering and measures microwave thermal emission. Emissivity and root-meansquare slope maps between 330 degrees and 30 degrees E and 90 degrees N and 80 degrees S are dissimilar, although some local features are exceptions. Inferred surface emissivities typically are approximately 0.85, but vary from approximately 0.35 at Maxwell to approximately 0.95 northeast of Gula Mons and other locations. Lowest emissivities appear in topographically high areas; this relation suggests that a phase change or differences in chemical weathering occur at about 6055-kilometer radius. Initial results indicate that there are significant variations in the surface scattering function. | | Source: | PubMed, pmid17769273 doi: 10.1126/science.252.5003.265 | | Services: | Forum | Review | Favorites | |
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