
Accession Number : AD0647177
Title : BEHAVIOR OF NONRAYLEIGH STATISTICS OF MICROWAVE FORWARD SCATTER FROM A RANDOM WATER SURFACE,
Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH GEOASTRO PHYSICS LAB
Personal Author(s) : Beard,C. I.
Report Date : DEC 1966
Pagination or Media Count : 47
Abstract : Measurements of the phasequadrature components of the microwave field forward scattered from random water waves have continued since the observance in 1963 of nonRayleigh probability distributions of the incoherent scattered field. Measurements of the variances of the phasequadrature components of the incoherent field at various phase angles with respect to the coherent field have yielded new results not explained by planewave theory: (a) The equiprobability ellipse of the phasequadrature components of the incoherent field rotates as a function of apparent surface roughness. (b) The rotation of the equiprobability ellipse varies more rapidly with roughness for 'narrow' surface illumination and less rapidly for 'broad' illumination. (c) The greatest ratio of the two variances appears to rise from unity with increasing roughness to a peak value (maximum departure from Rayleigh), and presumably decreases at greater roughnesses. The data indicate that nonplanar illuminating and receiving wave fronts may be responsible for these divergences from planewave theory. New theoretical development is needed to include the effects of wavefront sphericity. (Author)
Descriptors : (*MICROWAVES, SCATTERING), WATER WAVES, MEASUREMENT, ANALYSIS OF VARIANCE, STATISTICAL ANALYSIS
Subject Categories : Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE