摘要
伽利略卫星导航系统是由欧盟和欧洲航天局联合打造的全球卫星导航系统。本文提出了一种基于GPS/Galileo双系统伪距、载波相位观测量的精密单点定位模型,利用MGEX数据网提供的实测数据对双系统动态、静态PPP进行了解算分析并且分别与单一GPS或Galileo系统解算结果进行对比分析。结果显示,双系统组合定位能力远优于任一单系统;双系统动态PPP定位精度可达厘米级,同时定位收敛时间也更快;双系统组合静态PPP的定位精度在1~3cm量级,静态PPP的定位精度优于相应数据动态PPP的定位精度;双GNSS系统组合对城市遮挡环境下的定位导航具有重要意义。
Galileo is a global navigation satellites system launched by the European Union and the European Space Agency. In this paper, we developed a precise point positioning model based on pseudo range and carrier phase observations of GPS/Galileo. We use a large number of measured data obtained from the MGEX to carry out kinematic PPP and static PPP solutions of GPS/Galileo and compare the results with GPS-only and Galileo-only modes respectively. The results show that, the accuracy and capability of dual-system positioning is far superior to any single system; the accuracy of dual-system kinematic PPP can reach cm level and the convergence time is shorter; the accuracy of dual-system static PPP can reach 1 -3cm level and static PPP performs better than kinematic PPP; dual-and multi-GNSS plays an important role in navigation and positioning under the circumstance of city building block.
出处
《工程勘察》
2018年第1期70-74,共5页
Geotechnical Investigation & Surveying
