An Improved Two-Scale Model for the Ocean Surface Bistatic Scattering

Remote sensing applications require developing accurate models to predict radar bistatic scattering from rough surfaces. In this context, an improved two-scale model (TSM) is proposed for electromagnetic bistatic scattering from sea surface. The simplest TSM combines the first order small perturbation method (SPM1) with Kirchhoff Approximation. We add the second order SPM contribution to SPM1 to develop an improved TSM. The calculations are made by assuming the surface-height spectrum of Elfouhaily et al. for fully developed seas. In backscattering configuration the numerical results are compared with the published experimental data and SSA. The new TSM results are in good agreement with the experimental data specially, in cross-polarization. Finally, we use the new TSM to predict the sea scattering in bistatic configuration and compare the results with SSA.