Bistatic point target reference spectrum in the presence of trajectory deviations

The point target reference spectrum (BPTRS) of bistatic SAR in the presence of trajectory deviations based on Loffeld´s bistatic formula (LBF) is developed. The presented BPTRS is suitable for the general air-borne bistatic configuration. For the air-borne bistatic SAR, both the transmitter and the receiver will contribute to the trajectory deviation. The compensation of trajectory deviations becomes more complex because of the separate locations of the transmitter and receiver. The authors focus on the effects of trajectory deviations on the point target spectrum of bistatic SAR. The proposed BPTRS is verified by simulation experiments performed in the azimuth-invariant configuration.