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