POS辅助光束法区域网平差  

POS-supported Bundle Block Adjustment

作　　者：袁修孝[1] 

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079

出　　处：《测绘学报》2008年第3期342-348,共7页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金项目(40771176);教育部新世纪优秀人才支持计划项目(NCET-04-0662)

摘　　要：介绍POS数据与摄影测量观测值联合平差的基本原理,推导了平差基础误差方程,并利用自行研制的POS辅助光束法区域网平差系统WuCAPS对摄自两个平坦地区的1∶2 500和1∶60 000比例尺两种航摄影像进行了试验。结果表明,利用POS系统测定的未检校与经检校场检校后的影像定向参数辅助光束法区域网平差的结果基本是一致的。此时,仅需在区域四角各布设1个平高地面控制点就能满足航空摄影测量加密的精度要求,这不但减少摄影测量加密野外像片控制点的联测工作量,而且避免了使用POS系统时必须设置专门检校场的繁琐检校,可以明显提高航空摄影效率,节省POS使用成本,有利于POS系统的大规模推广应用。The basic principle of combined bundle block adjustment for POS data and photogrammetric observa tions is described in this paper. A fundamental error equation is established according to the rigorous geometric relationships among aerial camera, GPS receiver and IMU （inertial measurement unit）. A POS supported bundie block adjustment system WuCAPS is developed by author based on the basic mathematical model. Two sets of aerial images, at scales 1 ： 2 500 and 1 ： 60 000, with POS data taken over two projects of the fiat topogra phy in China were processed by WuCAPS. The experimental results have verified that the accuracy of POS supported bundle block adjustment using the POS determined positions and attitudes of aerial camera between uncalibrated and calibrated is very closed. When one ground control point （GCP） in the each corner around the block is set, the coordinate accuracy of photogrammetric points can meet the requirements of the specifications of topographic mapping. This can not only reduce the workload of field GCPs＇ translocation, but avoiding the implantation of calibration field. Therefore, it can save POS operation cost dramatically. In the same time, a novel, rapid and economical method for aerial triangulation is proposed in this paper.

关 键 词：定位定姿系统(POS) POS辅助光束法区域网平差 理论精度 实际精度 

分 类 号：P208[天文地球—地图制图学与地理信息工程]