北半球高纬度地区BDS-3新频率单点定位性能分析

Performance Analysis of BDS-3 New Frequency Single Point Positioning in High Latitude Areas of the Northern Hemisphere

北斗三号(BDS-3)已经正式开通全球服务,评估其新频率在高纬度地区的定位性能具有一定的科学意义,本文利用MGEX跟踪站实测数据分析了北半球高纬度地区BDS-3新频率单点定位精度。实验结果表明,在北半球高纬度地区,BDS-3卫星分布情况略差于GPS和Galileo系统,B1C、B2a以及B1C/B2a组合单点定位水平精度优于1 m,高程精度优于2 m,但略差于GPS和Galileo系统部分频率单点定位精度,对高纬度地区科学考察定位服务具有一定的参考意义。

The BDS-3 has officially opened its global service.It is of scientific significance to evaluate the positioning performance of its new frequency in high latitudes.In this paper,the accuracy of BDS-3 new frequency single point positioning in high latitude areas of the northern hemisphere is analyzed by using the measured data of MGEX tracking station.Experimental results show that in high latitudes of the northern hemisphere,the distribution of BDS-3 satellites is slightly worse than that of GPS and Galileo systems.The horizontal accuracy of B1C,B2a and B1C/B2a combined single point positioning is better than 1m,and the elevation accuracy is better than 2m,but slightly worse than that of GPS and Galileo systems at some frequencies.It has certain reference significance for scientific investigation and positioning services in high latitude areas.