一种天绘一号卫星影像精确定位方法  

Precise positioning of TH-01 satellite images based on RPC models

作　　者：周欣 王海岩 杨国鹏[2] 

机构地区：[1]中国天绘卫星中心,北京102102 [2]空军装备研究院,北京100085

出　　处：《测绘科学》2016年第11期5-9,129,共6页Science of Surveying and Mapping

摘　　要：针对如何最大程度地减小天绘一号卫星RPC模型系统误差,真实反映像方坐标与物方坐标关系的问题,该文介绍了天绘一号卫星的基本情况及相应的RPC参数模型,给出了求解RPC参数的基本方法和流程。结合天绘一号卫星采用等效框幅式光束法平差进行无控定位的特点,利用平差后计算得到的加密点坐标,提出了一种基于像点仿射变换的RPC模型区域网平差方法,并进行了RPC参数修正。经天绘一号卫星精度检测实验表明,修正后的RPC参数能有效地弥补系统性误差,具有更高的定位精度。Aim at the question on how to maximize reduce TH-01 satellite RPC model systematic er- rors and response the truth that image side reaction coordinate relations with the coordinates of the object side. In this paper the basic information and RPC（Rational Polynomial Coefficients, RPC） model of TH-01 satellite is given firstly, and then basic methods and steps to resolve RPC parameters are introduced. TH- 01 satellite uses EFP（Equivalent Frame Photo, EFP） bundle adjustment algorithm to complete image ori- entation without ground control points. Based on this advantage, using the position information of orienta- tion points and connected points, a block adjustment method based on image space affine transformation to compensate RPC model systematic error is brought forward and the RPC parameters are correc- ted. Through TH-01 satellite precision validation experiment, it can be concluded that the improved RPC model can compensate system error effectively and has higher positioning accuracy.

关 键 词：天绘一号 有理函数模型 RPC模型 区域网平差 

分 类 号：P237[天文地球—摄影测量与遥感]