Phenomenology of signals in FSR for surface targets detection

In this paper the Doppler phase signature forming in Forward Scatter Radar (FSR) is analyzed to show the rationale for "true" forward scatter radar where a target actually crosses the baseline and the whole Doppler signature is used for target detection, speed and trajectory estimation. Several measured Doppler signatures are compared where the target is in one of diffraction zones with the view to separate between pure shadow radiation and bistatic scattering. Two identical objects, metallic and magnetic absorber covered, are chosen to demonstrate the difference in shadow and bistatic scattering mechanisms.