期刊
JOURNAL OF NAVIGATION
卷 67, 期 5, 页码 899-910出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0373463314000265
关键词
PPP; Convergence time; Zenith troposphere-delay estimate model; Virtual observation
资金
- National Natural Science Foundation of China [41174012, 41274022]
- National High Technology Research and Development Program of China [2013AA122502]
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.
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