地心地固坐标系有理多项式系数模型探讨  

Discussion on RPC model in Earth-Centered Earth-Fixed coordinate system

作　　者：程春泉[1] 宁晓刚[1] 张俊辉[2] 孙钰珊[1] 

机构地区：[1]中国测绘科学研究院,北京100830 [2]国家基础地理信息中心,北京100830

出　　处：《测绘科学》2015年第5期8-12,共5页Science of Surveying and Mapping

基　　金：国土资源部公益性行业科研专项经费项目(201411119-2)

摘　　要：针对遥感影像处理中多源影像联合定位研究的不足,该文在地心地固坐标系(ECEF)中构建航天光学与SAR影像的有理多项式(RPC)模型,给出了计算ECEF中RPC参数虚拟控制点的获取方法,分析了大地坐标系与ECEF中虚拟控制点格网的形变特点,并选取5种光学与SAR影像进行了RPC参数拟合试验,验证了模型的可行性。结果表明ECEF坐标系RPC模型不仅能够克服大地坐标系RPC模型存在应用盲区的缺点,也有利于通用模型和严密模型结合,在统一的坐标系中实现多源影像的联合定位。Aiming at the insufficiency of studying the combined orientation of multi-source images in RS image processing, the paper built the RPC model for spaceborne optical imagery and SAR imagery in ECEF, proposed the acquisition method of virtual control points used for RPC calculation in ECEF, and analyzed the distortion of virtual grids in ECEF and geodetic coordinate system. Finally, experiment of 5 spaceborne images from optical and SAR sensors was carried out, and result showed that the ECEF could be used as the object coordinate system of RPC model, which would not only overcome the application re- strictions in pole area with geodetic coordinates, but also provide a unified coordinate system for combined processing with multi-source images.

关 键 词：RPC模型 地心直角坐标系 卫星线阵影像 卫星SAR影像 影像定位 

分 类 号：P226[天文地球—大地测量学与测量工程]