NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Scattering of electromagnetic waves from a half-space of randomly distributed discrete scatterers and polarized backscattering ratio lawThe effective-medium approximation is applied to investigate scattering from a half-space of randomly and densely distributed discrete scatterers. Starting from vector wave equations, an approximation, called effective-medium Born approximation, a particular way, treating Green's functions, and special coordinates, of which the origin is set at the field point, are used to calculate the bistatic- and back-scatterings. An analytic solution of backscattering with closed form is obtained and it shows a depolarization effect. The theoretical results are in good agreement with the experimental measurements in the cases of snow, multi- and first-year sea-ice. The root product ratio of polarization to depolarization in backscattering is equal to 8; this result constitutes a law about polarized scattering phenomena in the nature.
Document ID
19910060164
Document Type
Reprint (Version printed in journal)
Authors
Zhu, P. Y. (Texas, University Arlington, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1991
Publication Information
Publication: Nuovo Cimento C, Serie 1
Volume: 14 C
ISSN: 0390-5551
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG5-486
Distribution Limits
Public
Copyright
Other