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In this paper, the IEM2Mc (integral equation model for second-order multiple s and complex-permittivity scattering media) model is modified in two aspects in bistatic scattering. Firstly, the full forms of the surface current terms in the Kirchhoff surface fields are reserved. Secondly, a transition function is used to estimate the Fresnel coefficients instead of the original expression. The simulating results of the improved IEM2Mc are compared with those of small perturbation method (SPM), Kirchhoff model (KA), and method of moment (MoM) for random rough surfaces scattering problems. It is shown that the improved IEM2Mc provides better predictions than the original form, especially for the large incident or scattering angle. [ABSTRACT FROM AUTHOR]

In this paper, the IEM2Mc (integral equation model for second-order multiple s and complex-permittivity scattering media) model is modified in two aspects in bistatic scattering. Firstly, the full forms of the surface current terms in the Kirchhoff surface fields are reserved. Secondly, a transition function is used to estimate the Fresnel coefficients instead of the original expression. The simulating results of the improved IEM2Mc are compared with those of small perturbation method (SPM), Kirchhoff model (KA), and method of moment (MoM) for random rough surfaces scattering problems. It is shown that the improved IEM2Mc provides better predictions than the original form, especially for the large incident or scattering angle. [ABSTRACT FROM AUTHOR]

A numerical method is presented to analyze the scattering behavior of large-scale stratified rough surfaces. The method improves the banded matrix iterative approach / canonical grid (BMIA/CAG) by adopting some simple formulas to calculate the coupling interactions between different surfaces. Such treatment reduces the complexity of the method at expense of little accuracy when the roughness of surfaces can be ignored compared to the distance between surfaces, and also reduces the computation time by parallel implementation technique. Based on emissivity calculation, the one-dimensional method is proven to be effective for the analysis of some scattering properties. Then the proposed method is compared with the method of moments (MoM) by example of multilayered lunar regolith. Details of numerical results are given and discussed, which provide a guide in the application of the improved method. [ABSTRACT FROM AUTHOR]