CAJ | 학술논문

在基于IMU/GPS测量数据的运动补偿方法中，IMU测量误差和地物目标定位误差导致不准确的相位补偿量，从而引入残余运动误差。该文针对机载干涉SAR运动补偿中地物目标定位误差的影响，建立了在斜视条件下由地物目标定位误差引入的残余运动误差的数学模型，分析了导致地物目标定位误差的系统采样延时误差、多普勒中心频率误差和参考DEM误差对残余运动误差的影响，重点讨论了参考DEM误差对干涉SAR图像质量、干涉相位和相干系数的影响。该文的讨论结果为机载高精度 SAR 和重轨干涉 SAR 数据处理中运动补偿精度提供了理论基础。
재기우IMU/GPS측량수거적운동보상방법중，IMU측량오차화지물목표정위오차도치불준학적상위보상량，종이인입잔여운동오차。해문침대궤재간섭SAR운동보상중지물목표정위오차적영향，건립료재사시조건하유지물목표정위오차인입적잔여운동오차적수학모형，분석료도치지물목표정위오차적계통채양연시오차、다보륵중심빈솔오차화삼고DEM오차대잔여운동오차적영향，중점토론료삼고DEM오차대간섭SAR도상질량、간섭상위화상간계수적영향。해문적토론결과위궤재고정도 SAR 화중궤간섭 SAR 수거처리중운동보상정도제공료이론기출。
The measurement inaccuracies of Inertial Measurement Unit/Global Positioning System (IMU/GPS) as well as the positioning error of the target may contribute to the residual uncompensated motion errors in the MOtion COmpensation (MOCO) approach. Aiming at the effects of target positioning error on MOCO for airborne interferometric SAR, the paper deduces a mathematical model of the residual motion error caused by the target positioning error under the condition of squint. Also, the effects of the system sampling delay, Doppler center frequency, and reference DEM errors on the residual motion error that result in target positioning error based on the model are analyzed. Then, the paper discusses the effects of the reference DEM error on the interferometric SAR image quality, the interferometric phase, and the coherent coefficient. The research provides theoretical basis for the MOCO precision in signal processing of the airborne high precision and airborne repeat-pass interferometric SARs.