Rigorous positioning with side-looking radar imagery based on Range-Coplanarity model
侧视雷达影像距离-共面模型严密定位

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.