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A New Method to Accelerate PPP Convergence Time by using a Global Zenith Troposphere Delay Estimate Model

Published online by Cambridge University Press:  29 April 2014

Yibin Yao ,
Chen Yu  and
Yufeng Hu
Yibin Yao*
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China) (Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China)
Chen Yu
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China)
Yufeng Hu
Affiliation:
(School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China)
*
(E-mail: ybyao@whu.edu.cn)
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Abstract

This paper presents a new algorithm to accelerate Precise Point Positioning (PPP) convergence. The main idea is to consider the station tropospheric zenith total delay, which is obtained by a global zenith troposphere delay estimate model, as virtual observation and combine it with phase and pseudo-range observations to formulate observation equations. Without relying on any other external enhancement information, it only requires four satellites to quickly complete the positioning with centimetre-level accuracy. Compared with the conventional method, the new one brings about 15% improvement in convergence time.

Keywords

PPPConvergence timeZenith troposphere-delay estimate modelVirtual observation
Type
Research Article
Information
The Journal of Navigation , Volume 67 , Issue 5 , September 2014 , pp. 899 - 910
Copyright
Copyright © The Royal Institute of Navigation 2014 

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