Raw signal simulation for very high resolution SAR based on polarimetric scattering theory

A method for raw signal simulation for extended SAR scenes with very high resolution is described. This simulator can handle resolution better than 1 m, squinted geometry, elliptical orbit motion and use a polarimetric reflectivity matrix. Classical polarimetric scattering theory is based on electromagnetic harmonic fields using Maxwell´s equations, Green´s function, Huygens´ principle and Kirchhoff´s approximation. Here, the scattering theory is modified for a chirp field. Calculated expressions for the scattered chirp field or the reflectivity matrix are presented. Such a reflectivity matrix can then be input to the inverse-EETF4 for raw data generation