Spatial correlation SAR system with complementary signals

In this work a new analytical geometrical approach in the description of the synthetic aperture radar (SAR) scenario, and high range resolution complementary phase code technique in SAR signal modulation and a spatial correlation image reconstruction procedure are suggested. The objects on the Earth surface are depicted in a 3-D Cartesians system and presented as assemblies of isotropic point scatterers of different intensities in relation to their reflectivity properties. No constraints are applied in the determination of point scatterers´ distances from the observation point localized on the aircraft, moving with a constant velocity on a rectilinear trajectory arbitrary oriented in a 3-D Cartesians system. Objects on the Earth surface are illuminated by complementary phase code pulses providing for a high range resolution in SAR imaging. By applying geometrical summing of signals reflected from separate point scatterers of an object with complicated shape a 3-D model of a SAR signal is created. A spatial correlation image reconstruction procedure is developed. The reference function necessary to accomplish the spatial correlation is constructed on the assumption that the observation area is presented as a 3-D regular grid in the nodes of which isotropic point scatterers with identical intensities are placed. To verify this approach to the SAR problem numerical experiment is carried out.