CAJ | 학술논문

针对机载合成孔径雷达(SAR)实时成像运动补偿对高精度运动参数的需求，该文提出一种基于捷联惯性导航系统/全球定位系统(SINS/GPS)组合 Rauch-Tung-Striebel (R-T-S)平滑估计的实时运动补偿方案。该方案在实时卡尔曼滤波的基础上，对SAR每一次合成孔径时间段内的滤波结果再进行后向平滑递推，进一步修正滤波结果。仿真试验和飞行成像数据处理结果表明，该方案可以有效提高合成孔径时间段内运动参数的估计精度。
침대궤재합성공경뢰체(SAR)실시성상운동보상대고정도운동삼수적수구，해문제출일충기우첩련관성도항계통/전구정위계통(SINS/GPS)조합 Rauch-Tung-Striebel (R-T-S)평활고계적실시운동보상방안。해방안재실시잡이만려파적기출상，대SAR매일차합성공경시간단내적려파결과재진행후향평활체추，진일보수정려파결과。방진시험화비행성상수거처리결과표명，해방안가이유효제고합성공경시간단내운동삼수적고계정도。
Considering the urgent need of high precision motion parameter for SAR motion compensation in real-time, a motion compensation scheme using the Strapdown Inertial Navigation System/Global Positioning System (SINS/GPS) integrated system based on Rauch-Tung-Striebel (R-T-S) smoothing method is proposed. In this scheme, the Kalman filtering is done firstly and based on this, the backward smoothing iteration is performed for correcting the filter’s results during each synthetic aperture moment. The results of numerical simulation and flight-test data processing show that the scheme can effectively improve the precision of estimates of the motion parameter in the synthetic aperture moment.