伪卫星增强GPS方法在变形监测中的应用研究(英文)  

Pseudolite-augmented GPS for Deformation Monitoring: Analysis and Experimental Study

作　　者：何秀凤[1] 陈永奇[2] 桑文刚[1] 杨光[1] 

机构地区：[1]河海大学卫星及空间信息应用研究所,江苏南京210098 [2]香港理工大学土地测量与地理资讯学系

出　　处：《测绘学报》2006年第4期315-320,共6页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金项目(50279005,50579013);香港研究资助委员会项目(BQ-821)

摘　　要：应用GPS对深开采的露天矿以及深山峡谷中的水库大坝进行变形监测,由于接收到的GPS卫星数目减少,导致GPS定位精度大大降低。采用伪卫星增强GPS的定位技术是解决这个问题的有效途径之一。提出GPS伪卫星组合测量新方法,建立组合观测量模型,开发减小伪卫星多路径效应的方法。基于实际的水电站观测数据分析伪卫星增强GPS提高定位精度的效果,给出GPS伪卫星组合定位的试验结果并验证所开发方法的有效性。Although GPS has been widely used for deformation monitoring, many survey environments, like in deep open-plt mines and valleys, limit the number of visible GPS satellites, deteriorating the survey accuracy. Pseudoliteaugmented GPS survey system can strengthen the positioning geometry. This study concentrates on pseudofite （PSL） application in deformation monitoring. The methodology for integration of GPS and PSL measurements is developed, in particular the method/strategy to estimate PSL multipath effect, one of the server sources of errors in PSL measurements, An analysis is conducted to illustrate how PSL measurements can improve the strength of positioning geometry at a hydro-power dam. A set of real GPS/PSL observations are processed to demonstrate the usefLdness of the developed methodology.

关 键 词：全球定位系统 伪卫星 变形监测 精密定位 

分 类 号：TU45[建筑科学—岩土工程]