Full wave analysis for scattering cross sections

Part 1: Scattering Cross Sections for Random Rough Surfaces - Full Wave Analysis. The full wave approach developed earlier to evaluate the radiation fields scattered by deterministic two dimensionally rough surfaces is used to determine the scattering cross sections for random rough surfaces. The medium below the irregular boundary is characterized by complex permittivity and permeability. For slightly rough surfaces, the full wave solutions for the incoherent scattered fields are shown to be in agreement with the perturbation solution. However, when the major contributions to the scattered fields come from the region of the rough surface around the stationary phase (specular) points, the full wave solutions are in agreement with the physical optics solutions. Thus, the full wave solutions which reduce the perturbation, the physical optics and the geometrical optics approximations in special cases, precisely determine the limitations of these approximations and reconcile the differences between them. Part 2: Scattering Cross Sections for Composite Random Surfaces - Full Wave Analysis. The full wave approach to rough surface scattering is applied to composite models of rough surfaces. In this work the principal distinguishing features of the individual rough surface is its correlation distance. Thus this model can be applied to scattering by rough seas as well as hilly terrain.