广域实时精密定位原型系统及初步结果  

A Wide Area Real-Time Differential GPS Prototype System and the Initial Results

作　　者：施闯[1,2] 楼益栋[1] 宋伟伟[1,3] 蔡华[1,3] 

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号430079 [2]武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号430079 [3]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2009年第11期1271-1274,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40904007);国家教育部中国大陆构造环境监测网络工程资助项目;国家863计划资助项目(2007AA12Z309;2007ZZ120603;2006AA12Z323)

摘　　要：介绍了基于全球IGS实时站数据流的广域实时精密定位原型系统的工作流程及关键技术解决方案。原型系统通过接收全球50个左右IGS参考站1s采样间隔的实时观测数据每秒解算的卫星钟差,并将广播星历的轨道与钟差改正数通过无线通信网络发送给双频用户,用户通过实时精密单点定位的方式实现高精度实时定位。原型系统的整个链路时间延迟为4～8s。测试结果表明,实时钟差产品精度优于0.2ns,实时用户定位精度平面为10cm,高程优于20cm。The work flow and key technology of wide area real time differential GPS proto type system are introduced. Based on nearly 50 IGS global Stations ＇ real-time observation data at 1 second interval, real-time satellite clock offset is continuously calculated second by second. On the mean time, real-time orbit corrections and clock corrections to Broadcast Ephemeris are calculated and sent to users by wireless communication network. The users with double frequency receiver can calculate the real time position by the RT-PPP （Real-time Precise point positioning） methods. Initial results of tests show real-time clock corrections＇ accuracy is better than 0.2 ns; real-time positioning RMS are better than 10 cm and 20 cm in the horizontal and vertical direction, respectively.

关 键 词：IGS实时数据流 实时卫星钟差确定 实时精密单点定位 

分 类 号：P228.41[天文地球—大地测量学与测量工程]