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Scattering from randomly oriented circular discs with application to vegetation
Author(s) -
Karam M. A.,
Fung A. K.
Publication year - 1983
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs018i004p00557
Subject(s) - scattering , radiative transfer , orientation (vector space) , computational physics , optics , space (punctuation) , physics , zero (linguistics) , mathematics , geometry , computer science , linguistics , philosophy , operating system
A vegetation layer is modeled by a collection of randomly oriented circular discs over a half space. The backscattering coefficient from such a half space is computed using the radiative transfer theory. It is shown that significantly different results are obtained from this theory as compared with some earlier investigations using the same modeling approach but with restricted disc orientations. In particular, the backscattered cross‐polarized returns cannot have a fast increasing angular trend which is inconsistent with measurements. By setting the appropriate angle of orientation to zero the theory reduces to previously published results. Comparisons are shown with measurements taken from milo, corn and wheat and good agreements are obtained for both polarized and cross‐polarized returns.