Accession Number : AD0695450
Title : APPLICATION OF A STATISTICAL SURFACE MODEL TO PLANETARY RADAR ASTRONOMY.
Descriptive Note : Technical rept.,
Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF STATISTICS
Personal Author(s) : Marcus,Allan H.
Report Date : MAR 1969
Pagination or Media Count : 15
Abstract : A statistical model of the distribution of slopes and elevations on a cratered planetary surface is applied to scattering of radio waves by the Moon and Venus. It is found that the quasi-specular component of backscattered power can be fit by any symmetric stable distribution for elevation differences whose characteristic exponent is between 1 and 2 (crater diameter population index between 2 and 3). However, the lack of dependence on wavelength of the roughness parameter for decimeter and meter wavelengths suggests that surface elevation differences have nearly a Cauchy distribution, not a Gaussian distribution. (Author)
Descriptors : (*RADIO ASTRONOMY, EXTRATERRESTRIAL TOPOGRAPHY), (*EXTRATERRESTRIAL TOPOGRAPHY, DISTRIBUTION FUNCTIONS), MATHEMATICAL MODELS, STOCHASTIC PROCESSES, ROUGHNESS, CRATERING, RADAR SIGNALS, SCATTERING, MOON, VENUS(PLANET)
Subject Categories : Astrophysics
Distribution Statement : APPROVED FOR PUBLIC RELEASE