摘要
研究了观测数据短时失锁或中断情况下的精密单点定位-模糊度解算(precise point positioning-ambiguity resolution,PPP-AR)模糊度快速重收敛方法,给出了合理的观测值精化信息外推时间阈值,从系统端和用户端分别论证了该方法对提升现有非差网络RTK(undifferenced network real time kinematic positioning,URTK)服务可靠性的重要意义,并设计了相应的实时测试方案进行验证分析。测试结果表明,观测值精化信息可有效外推至少30s,采用PPP-AR模糊度快速重收敛技术后,即使在周跳频繁发生的恶劣观测条件下也能使URTK系统端和用户端保持较高的服务可靠性。用户无需区域增强系统支持即可独立实现模糊度快速重收敛,有效降低了用户从URTK系统端获取区域增强信息时的实时数据通讯负担。
We study PPP-AR rapid ambiguity re-convergence in the case of short-term loss or disruption of observation data,offer a reasonable extrapolation time threshold for using augmentation information,demonstrate the reliability improvement of existing URTK services when using this method,and design a corresponding real-time testing scheme to verify its availability.The results show that,augmentation information can be extrapolated for at least 30 s,and that the PPP-AR rapid ambiguity re-convergence method can improve the reliability of URTK service for control center and rovers even in poor observation conditions.Rovers can independently realize ambiguity rapid re-convergence without the support of regional URTK augmentation service,which will reduce the real-time data communication burden between rovers and control center significantly.
作者
邹璇
陈亮
李宗楠
唐卫明
施闯
ZOU Xuan CHEN Liang LI Zongnan TANG Weiming SHI Chuang(GNSS Research Center, Wuhan University, Wuhan 430079, China State Key Laboratory of Geodesy and Earth＇s Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China)
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2016年第10期1366-1371,共6页
Geomatics and Information Science of Wuhan University
基金
大地测量与地球动力学国家重点实验室开放基金(SKLGED2013-4-9-E)
国家自然科学基金(41304028)
高等学校博士学科点专项科研基金(20130141120005)
国家高技术研究和发展计划(2014AA123101)
三峡工程鱼类资源保护重点实验室基金(SXSN/4008)
武汉大学自主科研项目(2042016kf0184)~~
关键词
非差网络RTK
精密单点定位
模糊度固定
模糊度快速重收敛
区域增强
实时
undifferenced network RTK
precise point positioning ambiguity resolution
rapid ambiguity re-convergence
regional augmentation
real-time
