Inclination Angle Error Compensation Algorithm of MIMO Downward-looking Array SAR

被引：0

作者：

Liu H. ^{[1
]}

Li G. ^{[2
]}

Xu Q. ^{[3
]}

Lou L. ^{[4
]}

机构：

[1] School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou

[2] Zhengzhou Communications Planning Survey and Design Institute, Zhengzhou

[3] Information Engineering University, Zhengzhou

[4] Xi'an Research Institute of Surveying and Mapping, Xi'an

来源：

| 2018年 / SinoMaps Press卷 / 47期

基金：

中国国家自然科学基金;

关键词：

Downward-looking array SAR; Elements of exterior orientation; Error compensation; Inclination angle; Multi-input and multi-output;

D O I：

10.11947/j.AGCS.2018.20170292

中图分类号：

学科分类号：

摘要：

Combined with the real POS data form,elements of exterior orientation of traditional optical photogrammetry were introduced,and inclination angle error compensation methods of MIMO downward-looking array SAR were designed.The beam-independent phase error was compensated in the three-dimensional spatial domain firstly.Then the compensated echo data was transformed into the two-dimensional wavenumber domain in along-track and cross-track directions,and was equally divided into M and N segments.The MN subblocks were zeroed and extended to the original size,transformed into the two-dimensional spatial domain in along-track and cross-track directions and wavenumber domain in range direction,and the beam-dependent phase error was compensated.Then,the subblock echo data were transformed into three-dimensional spatial domain,and added directly to the final data.Finally,the correct 3D imaging results could be obtained by 3D RD imaging algorithm.The effectiveness of the proposed method was verified by simulation experiments. © 2018, Surveying and Mapping Press. All right reserved.

引用

页码：973 / 985

页数：12

共 27 条

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