Fully-Coherent Electromagnetic Scattering Model for 3D Dense Random Volumes

Physics-based Fully-Coherent Electromagnetic (EM) scattering model from 3D dense random volumes with arbitrary thickness is considered. A fully-coherent EM computation is performed using the Statistical S-Matrix Wave Propagation-in Spectral domain approach (SSWaP-SD) along with a Method of Moments (MoM) code based on the Discrete-Dipole Approximation (DDA). For an arbitrarily thick volume, thin slabs of the medium is analyzed a corresponding polarimetric N-port (representing different directions of scattering) S-matrix is generated. These S-matrices are cascaded using SSWaP-SD method to calculate the total forward and backward bistatic scattered fields in a fully coherent way. The simulation results of the backscattering from an arbitrary thick snow layer are presented.