Establishing model and plotting zero doppler regions for moving targets along bistatic baseline

According to the idea of establishing monostatic target model, the echo model for a moving target model along bistatic baseline was established by the theory of analytic geometry. The moving target model along bistatic baseline is a special situation of general bistatic target's echo model. The establishment of the model lays an analytical foundation for dividing zero Doppler areas on the bistatic baseline while a model established by Tsao T doesn't possess above-mentioned feature. Besides the feature, no complex reference system is required for the model in the paper. It provides a new idea for analysing ambiguity function.