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 def iciencies in photogrammetric application with the existing geometric imaging model of radar imagery. In view of this situation the theoretical analysis was made f irstly 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 experiments show that the proposed R-Cp model embody the attributes of image measurement coordinate as photogrammetric observation 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 overcome the shortcomings existed in other model and improve the rigor, stability, reliability and eff iciency.