一种新的机载InSAR三维区域网平差算法  

A new algorithm for three-dimensional block adjustment of airborne InSAR

作　　者：陈刚[1,2] 钱方明 刘志铭[1,2] 张笑微 CHEN Gang;QIAN Fangming;LIU Zhiming;ZHANG Xiaowei(Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China)

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2021年第1期15-23,共9页Geomatics Science and Engineering

摘　　要：区域网平差是InSAR规模化生产的必须环节之一,能有效减少外业控制点布设数量,保证同名点坐标的一致性。首先,本文以Mora定位模型为基础,提出了一种新的机载InSAR三维区域网平差算法,该算法基于地面控制点和连接点,采用最小二乘迭代解算定位参数和连接点坐标改正数;然后,给出了平差流程和精度评估方法。利用Ka波段的干涉数据进行了平差实验,实验结果表明,本文提出的方法能消除干涉像对间平面和高程的差异,验证了本文提出方法的有效性。Block adjustment is a necessary step in large scale production of InSAR,which can reduce the number of ground control points(GCP)and ensure the coordinate consistency of homologous points.Based on the Mora positioning model,a new algorithm for three-dimensional block adjustment of airborne InSAR is proposed and the flow chart is given.The algorithm is based on the GCPs and the connection points,and the least squares iteration is used to solve the positioning parameters and the coordinates of the connection points.Then the adjustment workflow and precision evaluation method are given.An adjustment ex-periment was performed using Ka-band interferometric data.The experimental results show that the proposed method can eliminate the difference of plane and elevation between interferometric image pairs,and the effectiveness of the new algorithm is proved.

关 键 词：干涉合成孔径雷达 区域网平差 基线定标 最小二乘 连接点 

分 类 号：P236[天文地球—摄影测量与遥感]