Abstract: This paper states the signal Model of bistatic Synthetic Aperture Radar in the satellite/airborne configuration,and then analyzes the properties of the Doppler parameters,target position and Range Cell Migration (RCM).The twodimension spectrum is deduced using the monostatic SAR equivalent,and the phase error is compared between monostatic SAR equivalent and Taylor serial expand.The Nonlinear Chirp Scaling algorithm is used for the imaging of bistatic SAR.An interpolation operation is required to remove the azimuth scaling in the images,and the range offset in the image is removed by shifting the range spectrum.Finally,the algorithm proposed with this paper is validated using simulation experiment.