Shadow-corrected bistatic scattering from randomly very rough surfaces

Abstract

The like- and cross-polarized scattering coefficients of electromagnetic waves from random rough surfaces corrected by shadowing functions are studied in this paper. Due to the use of approximate tangential surface fields in the derivative of all the wave scattering from randomly rough surfaces, the shadowing functions should be added to correct the scattering especially from surfaces with large rms surface slope. For correct prediction to the scattering characteristics we apply the suitable angular shadowing function to the single and multiple scattering coefficients respectively. The comparisons of scattering coefficients with or without shadowing functions are shown in this paper to evaluate the conditions of angular shadowing functions and the effect of shadowing function for the scattering from random very rough surfaces. We also compare the shadow-corrected scattering coefficients with the measured data and find the good agreements between them.