GPS/BDS组合实时动态精密单点定位

针对常规模式下。单系统实时精密单点定位精度受接收机环境和可视卫星数量影响严重等问题,研究了GPS/BDS双系统实时精密单点定位,采用非差无电离层组合载波和伪距观测值,详细推论了Kalman滤波参数估计方法的基本原理,并利用其进行参数估计,最后通过IGS站和实测数据进行了实时PPP实验,实验表明:GPS/BDS双系统定位模式较GPS单系统有明显改善,在E、N、U方向收敛后RMS值分别达到0.125 m、0.117 m、0.289 m,较单系统在各方向分别改善了11.9%、18.1%、22.5%。证明了GPS/BDS实时PPP能够达到分米级到厘米级定位精度。

GPS/BDS Combination Real-time Dynamic Precision Pingle Point Positioning

For normal mode.The accuracy of single-system real-time precision single-point positioning is seriously affected by the receiver environment and the number of visible satellites.The GPS/BDS dual-system real-time precision single-point positioning is studied.The non-difference-free ionospheric combined carrier and pseudorange observations are used.The basic principle of Kalman filter parameter estimation method is deduced and used to estimate the parameters.Finally,the real-time PPP experiment is carried out by IGS station and measured data.The experiment shows that the GPS/BDS dual system positioning mode is significantly improved compared with the GPS single system.The RMS values after convergence in the E,N,and U directions are 0.125 m,0.117 m,and 0.289 m,respectively,which are 11.9%,18.1%,and 22.5%better than the single system in each direction.It is proved that the GPS/BDS real-time PPP can achieve the decimeter-to-centimeter-level positioning accuracy.