SAR ship target imaging by induced complementary movement

In this work a generalized ISAR approach to solve the SAR problem for ship target image reconstruction and recognition is addressed. A new coordinate definition of the 3-D SAR scenario is suggested. An analytical geometrical approach to define apparent yaw, pitch and roll angle of the ship target at sea is implemented. Mathematical expressions to determine slant range distances to point scatterers are derived. The model of the SAR signal return is composed by a linear frequency modulated transmitted signal, geometry and reflectivity properties of point scatterers placed on the object. Image reconstruction procedure includes fast Fourier transform range compression and fast Fourier transform azimuth compression. To verify the new ISAR image reconstruction concept with respect to SAR problem a numerical experiment is carried out.