基于回波数据的机载双天线InSAR运动补偿

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (10): 2311-2316.

基于回波数据的机载双天线InSAR运动补偿

唐晓青^1,2, 向茂生¹, 吴一戎¹

1. 中国科学院电子学研究所微波成像技术国家重点实验室, 北京, 100190;
2. 中国科学院研究生院, 北京, 100190

收稿日期:2008-04-01 修回日期:2009-06-17 出版日期:2009-10-20 发布日期:2010-01-03
作者简介:唐晓青(1982- ),女,博士,主要研究方向为机载干涉SAR运动补偿.E-mail:xqtang18@163.com
基金资助:
国家高技术研究发展计划(863计划)(2007AA120302);国家重点基础研究发展计划(973计划)(2009CB724003)资助课题

Raw data-based motion compensation of airborne dual-antenna InSAR

TANG Xiao-qing^1,2, XIANG Mao-sheng¹, WU Yi-rong¹

1. National Key Lab. of Microwave Imaging Technology, Inst. of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate Univ. of Chinese Academy of Sciences, Beijing 100190, China

Received:2008-04-01 Revised:2009-06-17 Online:2009-10-20 Published:2010-01-03

摘要/Abstract

摘要： 基于定位定向系统(position and orientation system,POS)测量数据实现补偿不适用于基线非刚性的系统,因而研究了基于回波数据的干涉相位误差补偿方法——频谱分割方法,分析了干涉相位误差与载机姿态变化造成的斜距误差之间的关系,阐明了算法原理及适用条件.分析了算法的关键参数对补偿精度的影响,提出定量化的选取标准.基于相位误差随距离向变化的模型,改善了算法精度,给出了算法流程.最后利用该算法处理了实际机载双天线InSAR数据,结果表明该方法具有较高的精度,可以在缺乏测量数据的情况下完成干涉相位误差补偿.

Abstract: Usually,the phase error in the airborne dual-antenna InSAR interferograms is compensated using the POS data.However,the relative motion of two antennas can not be measured precisely in the case of non-rigid baseline dual-antenna InSAR system.In such case,a phase compensation method without measurement data is necessary.The raw data-based phase compensation of airborne dual-antenna InSAR interferograms with the spectum slicing method is studied.Based on the in-depth analysis of the relation between interferometric phase errors and motion errors,the principle and applicability of this approach are presented.The influence on the compensation accuracy and the principles of several parameters choices are analyzed.The approach is refined based on the range-variant model,and the flow chart is presented.Finally,the phase compensation result of airborne dual-antenna InSAR using this approach is demonstrateds,which proves that this raw data-based algorithm can proportionably substitute the use of POS data.

中图分类号:

TN951

唐晓青, 向茂生, 吴一戎. 基于回波数据的机载双天线InSAR运动补偿[J]. Journal of Systems Engineering and Electronics, 2009, 31(10): 2311-2316.

TANG Xiao-qing, XIANG Mao-sheng, WU Yi-rong. Raw data-based motion compensation of airborne dual-antenna InSAR[J]. Journal of Systems Engineering and Electronics, 2009, 31(10): 2311-2316.

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