三线阵相机体系定向模型研究  

Research of Orientation Model of Three-Linear-Array Camera System

作　　者：余俊鹏[1] 高卫军[1] 孙世君[1] 栗帅[1] 

机构地区：[1]北京空间机电研究所,北京100076

出　　处：《航天返回与遥感》2013年第1期44-51,共8页Spacecraft Recovery & Remote Sensing

摘　　要：针对星载三线阵相机结构特点,提出一种新的三线阵相机体系空间方位表达形式,其中采用正视相机的外方位元素以及前、后视相机相对于正视相机的投影中心空间偏移量和相对旋转角共18个定向参数,以体现三线阵相机体系在动态成像过程中的内部几何关联。将该形式引入摄影测量光束法平差模型,有利于减少三线阵相机在多基线观测情况下的定向参数,提高定向解算的稳定性。仿真数据试验结果表明,文中提出的定向模型在同等的地面控制条件下能有效提高三线阵相机的摄影测量精度,为三线阵影像的几何处理提供新的技术途径,可望在三线阵影像空间信息提取中得到应用。In this paper, a new space orientation representation is advanced for three-linear-array camera system, reflecting its configuration characteristic. The orientation parameters include the exterior orientation elements of the vertical camera, the space offset between forward/backward camera and vertical camera, and the relative orientation angular between forward/backward camera and vertical camera. The new orientation representation can effectively embody the interior geometry relationship of three-linear-array camera system during dynamic imaging process. By introducing this representation into bundle adjust model, the orientation model parameters under multi-baseline photogrammetry assignment can be obviously reduced. The parameters estimation will be more stable correspondingly. The simulating test result shows that the new orientation model can achieve better photogrammetry geopositioning accuracy under the same ground control condition. This model is recommended to be used to retrieve high precision space information from three-array imagery and offord a new technical approach for geometry processing.

关 键 词：三线阵相机 定向模型 光束法平差 测量精度 航天遥感 

分 类 号：P236[天文地球—摄影测量与遥感]