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- W2077890011 abstract "Radar observations of the lunar surface were made using the 10′ beamwidth antenna at Arecibo, Puerto Rico, at a wavelength of 70cm (430 Mc/s). Resolution of the surface of the order of 20 by 30km was achieved, first, by resolving the echo in time delay and Doppler frequency shift and, second, by using the narrow antenna beamwidth to remove the ambiguity between hemispheres. Echo strengths measured in delay and frequency coordinates were then mapped onto photographs of the moon. The following were determined: (1) The lunar highlands of the southwest quadrant of the moon backscatter 1½ to 2 times as effectively per unit area as the mare regions of the east and northeast quadrants of the moon. (2) The mountain ranges which surround the circular maria backscatter 1½ to 2 times as much power as the adjacent mare regions. (3) Some craters were found to backscatter as much as 10 times as much power as their environs. The craters which had enhanced backscattering were bright under a full moon illumination and were nearly always young." @default.
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- W2077890011 date "1966-10-15" @default.
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- W2077890011 title "Mapping of lunar radar reflectivity at 70 centimeters" @default.
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- W2077890011 doi "https://doi.org/10.1029/jz071i020p04843" @default.
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