一种基于网格虚拟参考站的伪距差分定位方法

Method of Pseudo-Range Differential Positioning Based on Grid Virtual Reference Stations

为增强国家大地点坐标的安全性,在网络伪距差分方法基础上提出一种网格伪距差分方法。该方法将经纬线网格的交点作为虚拟参考站,将基准站的伪距改正数内插到网格虚拟参考站上,播发各虚拟参考站坐标和伪距改正数,最终实现流动站用户伪距差分定位。实验表明,该方法能获得与多基准站伪距差分定位方法相当的精度,实时水平方向定位精度优于1m。

We propose a new method called differential positioning based on grid virtual reference stations to improve the security of the coordinates of the national geodetic control points.In this method,we select the points intersected by the longitude and latitude as the virtual reference stations,integrate pseudo-range correction of the virtual reference stations by the physical reference stations,broadcast the coordinates and the pseudo-range correction of the virtual reference stations,and calculate the users＇ positions.Experimental results show that the new method achieves accuracy to the decimeter-level,which is almost equal to the pseudo-range differential positioning based on multiple reference stations.