目标定位误差对机载干涉SAR运动补偿的影响:目标定位误差对机载干涉SAR运动补偿的影响

Q2 Physics and Astronomy

雷达学报 Pub Date : 2014-01-15 DOI:10.3724/SP.J.1300.2013.13040

Yin-wei Li, Wei Lideng, Xiang Maosheng

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引用次数: 2

摘要

在运动补偿(MOCO)方法中，惯性测量单元/全球定位系统(IMU/GPS)的测量精度以及目标的定位误差会导致剩余的未补偿运动误差。针对机载干涉SAR中目标定位误差对MOCO的影响，推导了斜视条件下目标定位误差引起的剩余运动误差的数学模型。分析了系统采样延迟、多普勒中心频率和参考DEM误差对基于该模型的目标定位误差残余运动误差的影响。然后，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。该研究为机载高精度和机载重复通干涉sar信号处理中的MOCO精度提供了理论依据。

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Effects of Target Positioning Error on Motion Compensation for Airborne Interferometric SAR: Effects of Target Positioning Error on Motion Compensation for Airborne Interferometric SAR

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.

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来源期刊

雷达学报 Physics and Astronomy-Instrumentation

CiteScore

4.10

自引率

0.00%

发文量

882

期刊介绍： Information not localized