CAJ | 학술논문

在基于测量数据的机载重轨干涉SAR运动补偿中，IMU/GPS测量误差和地物目标定位误差会引入残余运动误差，进而对SAR成像及干涉测量产生影响。该文针对上述两类误差，在斜视条件下建立了残余运动误差数学模型，并进一步分析了两类误差对残余运动误差的影响，在残余运动误差分析的基础上重点讨论了不同形式的IMU/GPS测量误差对干涉SAR图像质量、干涉相位、DEM精度的影响。该文通过理论和仿真分析定量研究了残余运动误差对机载重轨干涉SAR系统的性能影响，为机载重轨干涉SAR系统设计和信号处理提供了参考依据。
재기우측량수거적궤재중궤간섭SAR운동보상중，IMU/GPS측량오차화지물목표정위오차회인입잔여운동오차，진이대SAR성상급간섭측양산생영향。해문침대상술량류오차，재사시조건하건립료잔여운동오차수학모형，병진일보분석료량류오차대잔여운동오차적영향，재잔여운동오차분석적기출상중점토론료불동형식적IMU/GPS측량오차대간섭SAR도상질량、간섭상위、DEM정도적영향。해문통과이론화방진분석정량연구료잔여운동오차대궤재중궤간섭SAR계통적성능영향，위궤재중궤간섭SAR계통설계화신호처리제공료삼고의거。
In the MOtion COmpensation (MOCO) approach to airborne repeat-pass interferometric Synthetic Aperture Radar (SAR) based on motion measurement data, the measurement inaccuracies of Inertial Measurement Unit/Global Positioning System (IMU/GPS) and the positioning errors of the target, which may contribute to the residual uncompensated motion errors, affect the imaging result and interferometric measurement. Considering the effects of the two types of error, this paper builds a mathematical model of residual motion errors in presence of squint, and analyzes the effects on the residual motion errors induced by the measurement inaccuracies of IMU/GPS and the positioning errors of the target. In particular, the effects of various measurement inaccuracies of IMU/GPS on interferometric SAR image quality, interferometric phase, and digital elevation model precision are disscussed. Moreover, the paper quantitatively researches the effects of residual motion errors on airborne repeat-pass interferometric SAR through theoretical and simulated analyses and provides theoretical bases for system design and signal processing.