Application of Atmospheric Augmentation for PPP-RTK with Instantaneous Ambiguity Resolution in Kinematic Vehicle Positioning

被引:0
|
作者
Shao, Zhu-Feng [1 ]
Gong, Dun-Wei [2 ]
Qu, Zi-Yang [3 ]
Xu, Sheng-Yi [4 ]
Lei, Xiao-Ting [4 ]
Li, Zhen [4 ]
机构
[1] China Univ Min & Technol, Sch Informat & Control Engn, Xuzhou 221116, Peoples R China
[2] Qingdao Univ Sci & Technol, Coll Automat & Elect Engn, Qingdao 266000, Peoples R China
[3] Kepler Satellite Orbit Sci & Technol Wuhan Co Ltd, Wuhan 430079, Peoples R China
[4] Wuhan Univ, GNSS Res Ctr, Wuhan 430079, Peoples R China
关键词
GNSS; PPP-RTK; atmospheric augmentation; vehicle navigation; PRECISE; PERFORMANCE; NAVIGATION; CLOCK;
D O I
10.3390/rs16152864
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The long convergence time and non-robust positioning accuracy are the main factors limiting the application of precision single-point positioning (PPP) in kinematic vehicle navigation. Therefore, a dual/triple-frequency multi-constellation PPP-RTK method with atmospheric augmentation is proposed to achieve cm-level reliable kinematic positioning. The performance was assessed using a set of static station and kinematic vehicle positioning experiments conducted in Wuhan. In the static experiments, instantaneous convergence within 1 s and centimeter-level positioning accuracy were achieved for PPP-RTK using dual-frequency observation. For the kinematic experiments, instantaneous convergence was also achieved for dual-frequency PPP-RTK in open areas, with RMS of 2.6 cm, 2.6 cm, and 7.5 cm in the north, east, and up directions, respectively, with accuracy similar to short-baseline real-time kinematic positioning (RTK). Horizontal positioning errors of less than 0.1 m and 3D positional errors of less than 0.2 m were 99.54% and 98.46%, respectively. Additionally, after the outage of GNSS and during satellite reduction in obstructed environments, faster reconvergence and greater accuracy stability were realized compared with PPP without atmospheric enhancement. Triple-frequency PPP-RTK was able to further enhance the robustness and accuracy of positioning, with RMS of 2.2 cm, 2.0 cm, and 7.3 cm, respectively. In summary, a performance similar to RTK was achieved based on dual-frequency PPP-RTK, demonstrating that PPP-RTK has the potential for lane-level navigation.
引用
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页数:16
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