Fig. 1. SBISAR imaging geometry

Fig. 2. Flow chart of the RD imaging algorithm

Fig. 3. Imaging geometry and target scattering point model

Fig. 4. One-dimensional range profile of a single echo

Fig. 5. RMSE performances of different methods

Fig. 6. Comparison of the RD imaging results using echo of point scatter simulation

Fig. 7. Model of satellite target in electromagnetic simulation

Fig. 8. Comparison of the RD imaging results using echo of electromagnetic simulation