我国东北地区BDS与GPS伪距单点定位精度对比分析

Comparative analysis on point pseudo-range positioning accuracy of BDS and GPS in northeast China

为了进一步比较分析北斗卫星导航系统与GPS的定位精度,提出采用最小二乘算法分别对二者进行伪距单点定位解算。实验数据来源于卫星分布相对较弱的东北地区,利用广播星历与伪距观测值实现单系统BDS与GPS的伪距单点定位。结果表明,BDS与GPS单系统的三维定位精度基本相当,BDS相比GPS在E方向上的精度较高。

In order to further comparat ively analyze the posit ioning accuracy of BDS and GPS, the paper proposed the least square method to process the pseudo-range point positioning data of GPS and BDS. The broadcast ephemeris and the pseudo-range observation were used to realize the point pseudo-range positioning of single-system BDS and GPS respectively with ex-perimental data from the northeast China where satell ite distribution is relatively weak. Result showed the accuracy in three-di-mension directions of BDS and GPS could be roughly equal, while the accuracy of BDS in the direction of Ewould behigher than that of GPS.