GB-SAR影像坐标三维变换水平转角计算方法  

A calculation method of horizontal rotation angle for GB-SAR image coordinate 3D transformation

作　　者：王鹏 李伟城 邢诚[2] WANG Peng;LI Weicheng;XING Cheng(School of Geography Science and Geomatics Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]苏州科技大学地理科学与测绘工程学院,江苏苏州215009 [2]武汉大学测绘学院,武汉430079

出　　处：《测绘科学》2022年第2期145-150,183,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金青年科学基金项目(41801381)。

摘　　要：针对地基合成孔径雷达(GB-SAR)影像坐标三维变换中公共点法在计算轴系水平转角时存在的点位识别困难、计算精度低等问题,该文提出一种基于GB-SAR影像特征线的水平转角计算方法,将影像坐标的三维变换转化为平面点集的配准问题,并详细设计了特征线法的实现步骤。计算结果表明,该方法能够快速识别GB-SAR特征线像元坐标序列,保证较高的水平转角计算精度。可为后续GB-SAR监测成果同其他监测技术成果开展融合处理和比较分析提供保障。In view of the difficulties in position recognition and low calculation accuracy of the traditional common point method in calculating the horizontal rotation angle for the 3 D transformation of ground-based synthetic aperture radar(GB-SAR)image coordinates,this paper proposes a horizontal angle calculation method based on the characteristic lines in GB-SAR image.The 3 D transformation of image coordinates is turned into the registration between plane point sets,and the implementation steps of this method are designed in detail.The calculation results show that the proposed method can quickly identify the pixel coordinate sequence of the GB-SAR characteristic lines,and guarantee the accuracy of horizontal angle calculation,which can provide support for the fusion processing and comparative analysis of the GB-SAR monitoring results and other monitoring technology results.

关 键 词：地基合成孔径雷达 影像坐标 水平转角 特征线 

分 类 号：P23[天文地球—摄影测量与遥感]