Fig. 1. The design idea of the MEO spaceborne SAR system

Fig. 2. Flow chart of the orbital design

Fig. 3. Relationship of the orbit inclination and the altitude of the Sun-synchronous circular orbit

Fig. 4. Transmitted signal model

Fig. 5. System diagram

Fig. 6. Structure diagram of the system framework

Fig. 7. Sequence diagram，in which the index is 0，and ［R，G，B］=［0，0，0］ at A， while the index is 2 and ［R，G，B］=［1，1，1］ at B

Fig. 8. Focus images of the distance subbands 1 ~ 8