侧视雷达影像距离——共面模型严密定位  

Rigorous positioning with side-looking radar imagery based on Range-Coplanarity model

作　　者：程春泉[1] 张继贤[1] 

机构地区：[1]中国测绘科学研究院对地观测技术国家测绘局重点实验室,北京100039

出　　处：《遥感学报》2012年第5期881-894,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金(编号:41071237);国家高技术发展计划(863计划)(编号:2011AA120401;2011AA120402)~~

摘　　要：本文对现有侧视雷达遥感影像的几何构像模型在摄影测量应用中的不足进行了理论分析,以外方位元素作为定向参数,依次建立了像点坐标显函数形式的距离-共面(R-Cp)方程、地心直角坐标系中星载侧视雷达影像的距离-共面方程、以及星载侧视雷达遥感影像的严密定位模型,并进行了稀少控制点条件的星载TerraSAR-X影像定位试验。理论和试验表明,本文所建立的R-Cp严密定位模型,使得雷达影像像点量测坐标作为摄影测量观测值的属性得到体现,容易吸收和利用光学遥感影像基于共线方程模型发展起来的成熟的数字摄影测量数据处理方法,有利于提高雷达遥感影像摄影测量数据处理的严密性、稳定性、可靠性及数据处理效率。There still has some deficiencies in photogrammetric application with the existing geometric imaging model of radar imagery. In view of this situation the theoretical analysis was made firstly in this paper. Then several equations were constructed in turn, including Range-Coplanar （R-Cp） equation with explicit function form of image point coordinate, Range-Coplanarity equation in geocentric coordinate system and rigorous positioning model based on R-Cp equation. At last some tests including rigorous positioning were done with spaceborne TerraSAR-X imagery and sparse ground control point. The theory and experi- ments show that the proposed R-Cp model embody the attributes of image measurement coordinate as photogrammetric observa- tion value, which make it easy to absorb and utilize mature digital photogrammetric theory and methods developed on collinear equation model for optical remote sensing images. For data processing of radar imagery photogrammetry the model can over-come the shortcomings existed in other model and improve the rigor, stability, reliability and efficiency.

关 键 词：距离.共面方程 侧视雷达 稀少控制点 严密定位 外方位元素 联合平差 

分 类 号：P237[天文地球—摄影测量与遥感]