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- W2158169611 abstract "Magellan (MGN) bistatic radar observations in 1994 confirmed earlier Pioneer Venus reports of unusual Venus surface reflectivity and emissivity at elevations above 6054 km radius. They also revealed that the anomalous values of surface dielectric constant ɛ near Cleopatra Patera included a large imaginary component (ɛ ≈ −i 100) at 13 cm wavelength, consistent with a semiconducting surface material. The MGN observations were conducted using a linearly polarized wave, canted at 45° with respect to the plane of incidence and radiated by the MGN synthetic aperture radar antenna toward the specularly reflecting region of the mean planetary surface. In 2006 similar experiments were conducted using 13 cm circularly polarized transmissions from Venus Express (VEX). The VEX signal‐to‐noise ratio (SNR) was lower than that of MGN, but elevated ∣ɛ∣ has been inferred broadly over Maxwell Montes. A quasi‐specular echo was detected near Cleopatra but with insufficient SNR to address the question of conductivity. An early failure of the VEX 13 cm radio system precludes further measurements with VEX." @default.
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- W2158169611 date "2009-06-27" @default.
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- W2158169611 title "Venus Express bistatic radar: High-elevation anomalous reflectivity" @default.
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- W2158169611 doi "https://doi.org/10.1029/2008je003156" @default.
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