Abstract

Full-wave solutions for the vertically and horizontally polarized diffuse single- and double-scatter cross sections of random rough surfaces are given in terms of multidimensional integral expressions. The one-dimensional random rough surface is characterized by joint probability-density functions for the surface heights and slopes, and we account for the correlations between the surface heights and slopes. The full-wave solutions are compared with experimental results. The sharp enhanced backscatter is due to the contributions associated with the quasi-antiparallel paths in the expression for the double-scatter cross section. We conduct a comprehensive parametric study to determine the dependence of the level and the angular width of the sharp enhanced backscatter on the rough-surface characteristics. The results for the diffuse double-scatter cross sections exhibit a distinct dependence on polarization. Full-wave, high-frequency approximations that are practically independent of polarization provide useful physical insights into the problem.

© 1994 Optical Society of America

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