分布式卫星混合基线SAR-ATI相位校正方法

本文提出了一种分布式卫星混合基线SAR-ATI相位校正方法.分布式卫星在SAR-ATI工作模式下,由于编队构型、任务需求、地球自转、轨道摄动和卫星姿态变化等诸多因素的影响,卫星之间存在沿航向和切航向的混合基线.卫星间的切航向基线加剧了基线去相关引起的相位随机噪声,使得ATI相位中运动目标相位和地面高程相位混合在一起,造成了大量的虚警,导致动目标检测失败.本文提出了一种新的SAR-ATI混合相位校正方法,较好地抑制了切轨迹干涉相位,改善了SAR-ATI的检测性能.本文基于分布式卫星SAR仿真系统进行了仿真实验,实验结果证明了该方法的良好性能.

A phase correction method for Hybrid Baseline SAR-ATI of Distributed Satellites

This paper proposed a phase correction method for hybrid baseline SAR-ATI of distributed satellites.Due to many fac- tors,such as the satellites formation configuration,mission requirement,earth curvature,atmosphere perturbation and attitude change,the distributed satellites in SAR-ATI model include hybrid along-and cress-track baseline.The cross baseline increase the random phase noise of baseline decorrelation,which resulted in high false alarm and detection failure.This paper proposed a new phase correction method which can remove the cross track interferometric phase and noise efficiently,and improve the detection performance of SAR-ATI. Based on the distributed satellites SAB simulation system,the simulation experiments are carried out to verify the effectiveness of the proposed method.