CAJ | 학술논문

机载双站SAR的回波数据具有距离向空变性或距离-方位向二维空变性，需要对观测场景进行分块成像。本文从机载双站SAR的斜距历程出发，借助于载机轨迹解耦合公式，推导了观测场景中任一点目标的距离走动和距离弯曲公式。根据距离徙动校正后的残余距离徙动与二阶相位误差研究了机载双站SAR的成像区分块准则。基于分块准则仿真得到了各种构型机载双站SAR的成像区分块结果，分析了双站结构参数与系统参数对成像区的影响，为机载双站SAR宽场景成像时成像区分块提供了理论指导。
궤재쌍참SAR적회파수거구유거리향공변성혹거리-방위향이유공변성，수요대관측장경진행분괴성상。본문종궤재쌍참SAR적사거역정출발，차조우재궤궤적해우합공식，추도료관측장경중임일점목표적거리주동화거리만곡공식。근거거리사동교정후적잔여거리사동여이계상위오차연구료궤재쌍참SAR적성상구분괴준칙。기우분괴준칙방진득도료각충구형궤재쌍참SAR적성상구분괴결과，분석료쌍참결구삼수여계통삼수대성상구적영향，위궤재쌍참SAR관장경성상시성상구분괴제공료이론지도。
The echo data of airborne bistatic SAR has range space variance or range-azimuth space variance,so it is nec-essary to perform block imaging in airborne bistatic SAR focusing.Based on the slant range of airborne bistatic SAR,the range walk and range cure formulas of arbitrary point target in the observing scene are derived with the track decoupling for-mulas.After performing the range cell migration (RCM)correction,imaging region blocking rules are derived with the re-sidual range cell migration and quadratic phase error (QPE).Then imaging region blocking results of airborne bistatic SAR in various configuration are tested with the numerical simulations,moreover,influences of geometry parameters and system parameters on imaging region are also analyzed,and they provide theoretical guidance to imaging region blocking in airborne bistatic SAR wide scene focusing.