Accession Number:

AD0647177

Title:

BEHAVIOR OF NON-RAYLEIGH STATISTICS OF MICROWAVE FORWARD SCATTER FROM A RANDOM WATER SURFACE,

Descriptive Note:

Corporate Author:

BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH GEO-ASTRO PHYSICS LAB

Personal Author(s):

• Beard,C. I.

Report Date:

1966-12-01

Pagination or Media Count:

47.0

Abstract:

Measurements of the phase-quadrature components of the microwave field forward scattered from random water waves have continued since the observance in 1963 of non-Rayleigh probability distributions of the incoherent scattered field. Measurements of the variances of the phase-quadrature components of the incoherent field at various phase angles with respect to the coherent field have yielded new results not explained by plane-wave theory a The equiprobability ellipse of the phase-quadrature 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 plane-wave 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