Rough surface effects in microwave remote sensing: numerical Maxwell model using the UV/SMCG method

In this paper a procedure is developed for combining the multilevel UV method with the SMCG method in the computation of 3-D wave scattering from rough surface. It handles near and intermediate field interactions in the multilevel UV method and far field interactions in the SMCG method. This hybrid UV/SMCG method removes large memory requirement of both the UV method in the far field and the SMCG method in the near field. The computational complexity for the UV/SMCG method is still O(NlogN). The frequency dependences of scattering using a single set of physical parameters are illustrated in the simulations. The numerical simulation results are compared with small perturbation method and the Kirchhoff approximation. Keywords-wave scattering; fast algorithm; rough surface scattering