Abstract: Based on the configuration of Bistatic side-looking SAR with parallel track,the signal model of radar target with rotating part was provided,and then the mathematical expressions of micro-Doppler and its chirp-rate induced by target rotation were derived.The analysis indicates that the micro-Doppler effect is not only related to the parameters of micro-motion and carrier wavelength,but also the system geometrical configuration.So the micro-motion target indication ability can be improved by changing the geo...