北斗系统中长距离载波相位差分性能的研究

The performance of carrier phase difference based on the Beidou system with middle-long distance

全球对于北斗定位的研究已经愈来愈深入。文章利用实验仪器接收到的实际数据,对当前星座架构为5颗GEO卫星、5颗IGSO卫星的北斗系统的双频(B1,B2)载波相位差分的定位性能进行了分析,同时将实验结果与GPS载波相位差分的定位机能做了比较。由于外界环境以及基础设施对载波相位差分定位精度的影响,为了进一步优化定位准确率,减小乃至清除误差,采用多频观测测量的方式进行实验。文中对北斗系统、GPS系统及其组合系统在中长距离条件下载波相位差分定位效果进行了分析,从而对北斗系统中长距离载波相位差分的定位性能做出评估。

The global research on Beidou positioning has become more and more thorough. We use the actual receiving data to analyze the positioning performance of dual frequency( B1,B2) carrier phase difference in Beidou system whose constellation structure is 5 GEO satellites,5IGSO satellites. The positioning performance is compared with that of global positioning navigation system( GPS) carrier phase difference. Because the carrier phase differential positioning accuracy is limited by geometric factors,ionosphere and troposphere,the combination of multi frequency observation can reduce or even eliminate these errors,and further improve the differential positioning accuracy. In this paper,the carrier phase difference positioning effect of the Beidou system,GPS system and assembly system in the medium and long distance condition is analyzed,thus the Beidou system in medium and long distance carrier phase positioning performance is evaluated.