摘要
北斗三号卫星导航系统(BDS-3)已于2020年6月底全面建成,BDS-3可在全球范围内提供导航定位服务。为评估完整的BDS-3系统精密单点定位精度,选择6个MGEX站点的观测数据,使用开源软件MG-APP分别对BDS3系统、GPS系统以及组合系统的精密单点定位(PPP)精度进行分析。结果表明BDS-3系统的定位精度与GPS在同一量级,在X、Y、Z三个方向的外符合精度(单天解)均在3.5 cm内;BDS-3的可见卫星观测数目比GPS多,BDS-3的精密单点定位精度和收敛时间均比GPS稍差;采用BDS-3与GPS系统组合解算可以提高测量定位的精度、收敛速度(利用效率)和可靠性。
Fully completed by the end of June 2020, Beidou-3 Satellite Navigation System(BDS-3) is able to provide global navigation and positioning services. To assess single point positioning precision of complete system BDS-3, Point Positioning Precisions(PPP) of BDS3, GPS, and combined system were analyzed respectively by using software MG-APP based on the observed data from six MGEX stations. The results show that the positioning precision of system BDS-3 is at the same level as that of GPS, and the outer compliance accuracies(single day solution) in Direction X, Y and Z are within the range of 3.5 cm. The number of satellites observed through BDS-3 is more than that by GPS, but the former one has slightly lower point positioning precision and a little longer convergence time in comparison with GPS. Combination of BDS-3 and GPS can improve the positioning accuracy, convergence speed(utilization efficiency) and reliability.
作者
孙洪瑞
葛金龙
钮建定
吴卫平
Sun Hongrui;Ge Jinlong;Niu Jianding;Wu Weiping(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)
出处
《港工技术》
2022年第1期117-120,共4页
Port Engineering Technology
