Interference level evaluation in SS-BSAR with GNSS non-cooperative transmitter

Space-surface bistatic synthetic aperture radars (SS-BSAR) can effectively utilise non-cooperative transmitters (NCTs). For continuous wave NCTs, the desired reflected signals are fundamentally received at the background of direct path interference (DPI). Proposed is the method of signal-to-interference ratio (SIR) evaluation. It is shown that the improvement in SIR is achieved due to the specific ambiguity functions of the radiated signals, as well as the phase history of both the signal and DPI.