测绘学报

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一种基于IGS超快星历的区域性实时精密单点定位方法

易重海1,陈永奇2,朱建军3,戴吾蛟1   

  1. 1. 中南大学测绘与国土信息工程系
    2. 香港理工大学土地测量与地理资讯学系
    3. 中南大学地球科学与信息物理学院信息物理工程学院
  • 收稿日期:2010-02-08 修回日期:2010-09-24 出版日期:2011-04-25 发布日期:2011-04-25
  • 通讯作者: 易重海

An Approach to Regional Real Time Precise Point Positioning

  • Received:2010-02-08 Revised:2010-09-24 Online:2011-04-25 Published:2011-04-25

摘要: 实时GPS精密单点定位需要实时的卫星轨道和钟差产品,为此提出一种利用区域GPS连续运行参考站和IGS发布的IGU超快轨道进行实时精密单点定位的方法。该方法首先利用连续运行参考站观测数据与IGU超快轨道预报部分进行实时GPS卫星钟差的估计,然后利用估计得到的实时GPS卫星钟差产品和IGU超快轨道预报部分,进行用户GPS接收机的实时精密单点定位。实验表明该方法可达到厘米级实时精密单点定位的要求,并且该方法的服务范围可以扩展至该区域周边数百公里。

Abstract: Real time Precise Point Positioning (PPP) needs real time GPS orbit and clock product. An approach to real time PPP using regional GPS Continuously Operating Reference Stations (CORS) data and IGS ultra-rapid (IGU) product is proposed. First, real time GPS satellite clock was estimated using regional CORS data and IGU real time predicted orbit product. Then real time PPP positioning for user GPS receiver was conducted using the estimated real time satellite clock and IGU real time predicted orbit. Experiments show that the approach could be used to do centimeter level PPP positioning. And the valid service area of the proposed method could be extended to several hundreds kilometer out of the region.