多系统接收机的伪距测量精度对比分析

Comparison and Analysis of Pseudo-Range Measurement Accuracy of Multi-System Receiver

本文通过选取4个不同生产厂家的GNSS多频多系统接收机,将其分别安放在坐标已知的测站点上,进行了相同时长的静态观测实验,并对实验的结果进行了分析处理,通过对不同厂家的接收机观测到的13个频点[BDS(B1I,B1C,B2a,B3I);GPS(L1C,L2C,L5C,L2P);GALILEO(E1,E5a,E5b);GLONASS(L1CA,L2CA)]的伪距进行了三次差处理以及伪距二次多项式拟合,最后通过伪距单点定位进行了精度评价。实验的结果表明,BDS的伪距测量精度优于GPS,GALILEO,GLOANSS,其中GLOANSS伪距测量精度最低。

In this paper,GNSS multi-frequency and multi-system receivers from four different manufacturers are selected and placed on the measuring stations with known coordinates.Static observation experiments with the same time length are carried out and the results of the experiments are analyzed and processed.The pseudo-range of 13 frequency points[BDS(B1I,B1C,B2a,B3I);GPS(L1C,L2C,L5C,L2P);GALILEO(E1,E5a,E5b);GLONASS(L1CA,L2CA)]observed by different manufacturers are processed by cubic difference and quadratic polynomial fitting,and the accuracy is evaluated by pseudo-range single point positioning.The experimental results show that the pseudo-range measurement accuracy of BDS is better than GPS,GALILEO and GLOANSS,and the pseudo-range measurement accuracy of GLOANSS is the lowest.