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- W2017009816 abstract "The surface reflectivity of Venus at radar wavelengths of 17 cm varies from very ‘bright’ areas, such as the Maxwell Montes and other elevated regions like Terra Aphrodite, to the darkest regions, which are located in low-lying valleys. Radar altimeter data received from the instrument aboard the Pioneer Venus Orbiter are showing good correlations between brightness and surface elevations, but the indications are that the bright regions are too bright to be explained by radar reflections from dry terrestrial-type rocks. The dielectric constant (K) of rocks that radar reflect as the elevated regions of Venus' surface must be high, probably on the order K=9 or more. On Venus bright areas have K between 11 and 20, presenting difficulties in the interpretation of the surface materials. In a study by G.H. Pettengill, P.G. Ford, and S. Nozette (Science, Aug. 13, 1982), the high-reflectivity regions of Venus are interpreted as being due possibly to the presence of free metal or, more likely, to pyrite (FeS2), one of the few minerals with sufficiently high conductivity (1–105 mho/m)." @default.
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- W2017009816 date "1982-01-01" @default.
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- W2017009816 title "Surface of Venus: Possible sulfides" @default.
- W2017009816 doi "https://doi.org/10.1029/eo063i037p00777-04" @default.
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