GPS/GLONASS/BDS/Galileo动态精密单点定位精度及收敛时间分析  

Analysis on Accuracy and Convergence Time of Multi-GNSS Kinematic Precise Point Positioning: GPS/GLONASS/BDS/Galileo

作　　者：王利华 周定杰 刘鸿飞 苏国田 宗云婷 陈世杰 WANG Lihua;ZHOU Dingjie;LIU Hongfei;SU Guotian;ZONG Yunting;CHEN Shijie(Surveying and Mapping Engineering Institute of Yunnan Province,Kunming 650033,China;Yuxi Real Estate Registration Center,Yuxi 653108,China;Yunnan Earthquake Agency,Kunming 650224,China)

机构地区：[1]云南省测绘工程院,云南昆明650033 [2]玉溪市不动产登记中心,云南玉溪653108 [3]云南省地震局,云南昆明650224

出　　处：《测绘地理信息》2020年第4期64-69,共6页Journal of Geomatics

摘　　要：全球卫星导航系统(global navigation satellite system,GNSS)迅猛发展,在轨卫星数量不断增多,多系统轨道和钟差产品精度也在逐步提高,使得多模GNSS联合精密单点定位(precise point position,PPP)成为可能。分析了多模GNSS联合动态PPP精度及性能,给出了多模GNSS联合PPP算法;基于MGEX(Multi-GNSS Experiment)网数据,分析了多GNSS联合动态PPP在定位精度、收敛时间等方面的表现以及截止高度角对其产生的影响。实验结果表明,与GPS(global positioning system)单系统PPP相比,4系统联合动态PPP在精度及收敛速度上具有明显改善,E、N、U方向定位精度分别由1.24 cm、0.97 cm、3.59 cm提高到0.78 cm、0.77 cm、2.48 cm,收敛时间由22.7 min缩短为9.8 min。截止高度角的增加对单系统动态PPP性能影响很大,而多系统却保持了良好的稳定性。With the rapid development of GNSS,improvement of the number of on-orbit satellites and the improvement of precision of multi-system orbit and clock product,it is necessary to investigate the kinematic PPP with multi-system.The aim of this paper is to analyze the performance of multi-system kinematic PPP.Firstly,the algorithm of quad-system kinematic PPP was introduced.Then the performance of quad-system kinematic PPP in the positioning accuracy and convergence time is analyzed based on data provided by MGEX,and the influence of cut-off angle is also analyzed.Compared with single GPS,the multi-system kinematic PPP showed better performance on the accuracy and convergence time,the accuracy in direction of E,N,U is improved from 1.24 cm,0.97 cm,3.59 cm to 0.78 cm,0.77 cm,2.48 cm respectively;convergence time is shortened from 22.7 min to 9.8 min.The increase of cut-off angle has great influence on the dynamic PPP performance of single system,while multi-system maintains good stability.

关 键 词：多模全球卫星导航系统 动态精密单点定位 定位精度 收敛时间 截止高度角 

分 类 号：P228[天文地球—大地测量学与测量工程]