中文摘要：

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。试验表明该方法可达到厘米级实时精密单点定位的要求,并且该方法可用于相距CORS区域数百公里范围内的精密单点定位。

英文摘要：

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 is estimated using regional CORS data and IGU real time predicted orbit product.Then real time PPP positioning for user GPS receiver is conducted using the estimated real time satellite clock and IGU real time predicted orbit.Experiments show that the approach can be used to get centimeter level PPP result,and can extend PPP service area several hundreds kilometer away from CORS.