圆轨条带合成孔径雷达(SAR)是近年来提出的一种新的SAR成像模式,与传统的直线轨迹条带SAR和凝视SAR存在相似之处,但也有其自身的很大区别。文中对圆轨条带SAR几何关系和成像原理进行了分析和推导,并结合机载平台的运动特性,提出了结合运动补偿的圆轨条带SAR成像算法,对运动误差的影响和成像性能进行了分析。最后,通过计算机仿真实验和实测数据处理验证了本文所提方法的可行性和有效性。

Circular trace stripmap synthetic aperture radar (CTS-SAR) is a new operation mode presented recently, compared with linear trace stripmap SAR and staring SAR, it’s similar to them. However, it shows some unique features. The geometry correlation and work principle of CTS-SAR are deduced and analyzed. After analyzing the moving characteristics of airplane, a noval imageing algorithm with motion compensation for CTS-SAR is proposed. The impace of motion errors and imaging performance of this algorithm is analyzed. Finally, the results of computer simulation and real data processing validate the analyzed results and the imaging method.

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