MIMO下视阵列SAR位置偏移误差分析  

Position Offset Error Analysis of MIMO Downward-Looking Array SAR

作　　者：刘辉 李葛爽 田大永[3] 靳国旺[4] LIU Hui;LI Geshuang;TIAN Dayong;JIN Guowang(College of Surveying and Geo-information,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Zhengzhou Communications Planning Survey&Design Institute,Zhengzhou 450000,China;NO.2 Institute of Geo-Environment Survey of Henan,Zhengzhou 450012,China;Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]华北水利水电大学测绘与地理信息学院,河南郑州450045 [2]郑州市交通规划勘察设计研究院,河南郑州450000 [3]河南省地矿局第二地质环境调查院,河南郑州450012 [4]信息工程大学,河南郑州450001

出　　处：《测绘科学技术学报》2019年第6期588-593,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41901411);河南省青年人才托举工程项目(2020HYTP010);河南省高等学校重点科研项目(19A420008)。

摘　　要：首先借助GPS系统的3个平移分量,根据等效相位中心原理,详细推导了MIMO下视阵列SAR整体误差模型;其次在忽略姿态角误差影响的前提下,重点分析了各个独立平移分量对成像结果的影响程度,得出了高程向误差分量影响最大的结论;最后通过分别加入相同大小高程向和跨航向误差分量的仿真数据的三维成像实验,验证了结论的正确性。实践证明,MIMO下视阵列SAR作为一种新体制三维SAR系统,在高楼耸立的城市测绘领域具有重要的应用价值。According to the principle of equivalent phase center,the overall error model of the MIMO downward-looking array SAR is firstly deduced by using the three translation components of the GPS system.Then under the premise that ignoring the impact of angle errors,the impact degree of each independent translation component for imaging results is carefully analyzed.The conclusion that the error component in range direction has the greatest impact is obtained.Lastly,the conclusion is verified by the three-dimensional imaging experiment with the simulation data of the same size error components in range and cross-track directions.Practice has proved that MIMO downward-looking array SAR has important application value in urban mapping of high buildings,as a new three-dimensional SAR system.

关 键 词：下视阵列SAR 位置偏移误差 MIMO 等效相位中心 高程向误差分量 

分 类 号：P237[天文地球—摄影测量与遥感]