GPS/GLONASS组合单点定位及精度分析

介绍了基于广播星历的GPS/GLONASS组合导航单点定位的数学模型,分析了组合导航的技术难点。在GPS伪距法单点定位的基础上进行组合导航定位,其中GLONASS卫星坐标运用四阶龙格—库塔(Runge-Kutta)数值积分方法求得,利用一种新的不需要进行轨道拟合的编程方法来进行计算。以IGS跟踪站提供的观测数据为例,分别采用GPS、GLO-NASS和GPS/GLONASS三种方式组合进行伪距法单点定位,同时比较分析了不同权重选择对组合定位精度的影响。

GPS/GLONASS Point Positioning and its Accuracy Analysis

A mathematical model based on the broadcast ephemeris of GPS / GLONASS single-point positioning of the integrated navigation is described,and the technical difficulties of the combination of navigation is analyzed.The combination of navigation and positioning is based on GPS pseudo-range point positioning,and GLONASS satellite coordinates is obtained by fourth-order Runge-Kutta numerical integration methods,and a new kind of method which do not need to track intended together the programming approach to computing is used.To the IGS tracking stations to provide the data of observation,GPS,GLONASS and GPS/GLONASS combination of three kinds of ways are respectively applied to pseudo-range point positioning,and different weights to select the right combination of positioning accuracy has been done a comparative analysis.