CAJ | 학술논문

机载干涉SAR平台在飞行过程中通常会受气流、机械振动等因素的影响，造成柔性基线抖动，从而严重影响干涉 SAR 系统的性能。该文针对柔性基线机载干涉 SAR 系统中的基线抖动问题，首先推导了基线抖动下的斜距误差模型，然后从1次、2次和一般斜距误差建立了SAR复图像信号模型和双通道相关系数模型，并理论分析了基线抖动对SAR成像和干涉性能的影响。最后通过回波仿真实验验证了理论分析的正确性。
궤재간섭SAR평태재비행과정중통상회수기류、궤계진동등인소적영향，조성유성기선두동，종이엄중영향간섭 SAR 계통적성능。해문침대유성기선궤재간섭 SAR 계통중적기선두동문제，수선추도료기선두동하적사거오차모형，연후종1차、2차화일반사거오차건립료SAR복도상신호모형화쌍통도상관계수모형，병이론분석료기선두동대SAR성상화간섭성능적영향。최후통과회파방진실험험증료이론분석적정학성。
The airborne interferometric SAR platform suffers from instability factors, such as air turbulence and mechanical vibrations during flight. Such factors cause the oscillation of the flexible baseline, which leads to significant degradation of the performance of the interferometric SAR system. This study is concerned with the baseline oscillation. First, the error of the slant range model under baseline oscillation conditions is formulated. Then, the SAR complex image signal and dual-channel correlation coefficient are modeled based on the first-order, second-order, and generic slant range error. Subsequently, the impact of the baseline oscillation on the imaging and interferometric performance of the SAR system is analyzed. Finally, simulations of the echo data are used to validate the theoretical analysis of the baseline oscillation in the airborne interferometric SAR.