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提出一种改进的组合GPS/GLONASS精密单点定位(GG-PPP)算法,即首先利用传统的GG-PPP算法求得GPS-GLONASS系统时间差参数和天顶对流层延迟参数,然后将它们作为改进GG-PPP算法解算的先验信息,从而达到减少待估参数个数的目的。采用BJFS站的实测数据在一个模拟的露天矿区环境进行改进的GG-PPP算法试验。结果表明,在有限的卫星可视环境中,改进的GG-PPP算法能有效改善定位性能。
In this paper, an improved combined GPS / GLONASS precise point positioning (GG-PPP) algorithm is proposed. Firstly, the G-PPP algorithm is used to obtain the time difference parameters of the GPS-GLONASS system and the zenith tropospheric delay parameters, which are then used as an improved GG -PPP algorithm to solve the prior information, so as to achieve the purpose of reducing the number of parameters to be estimated. Based on the measured data from BJFS station, an improved GG-PPP algorithm was tested in a simulated open pit environment. The results show that in the limited satellite visual environment, the improved GG-PPP algorithm can effectively improve the positioning performance.