Towards Reliable and Precise BeiDou Positioning with Stochastic Modelling

被引:1
作者
Li, Bofeng [1 ]
Hao, Qingzhi [1 ]
机构
[1] Tongji Univ, Coll Surveying & Geoinformat, Shanghai, Peoples R China
来源
INTERNATIONAL SYMPOSIUM ON EARTH AND ENVIRONMENTAL SCIENCES FOR FUTURE GENERATIONS | 2018年 / 147卷
关键词
BeiDou; Cross correlation; Elevation-dependence; Stochastic model; Time correlation; GPS; VARIANCE;
D O I
10.1007/1345_2016_225
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The China's BeiDou system is the first global satellite navigation system to broadcast the three frequency signals for full constellation. A lot of studies have been done recently for positioning and navigation by using BeiDou three frequency signals, but mostly based on the GPS-like empirical stochastic model. This paper aims to study the stochastic modelling of BeiDou observations and then analyze its impact on the ambiguity resolution and precision positioning. To generalize the stochastic model, the satellite-dependent precisions, cross correlations between arbitrary two frequencies and time correlations for each frequency are set up. The results indicate that comparing with empirical stochastic model, the realistic stochastic model can improve the ambiguity resolution and positioning precision. Besides, the derived variance matrix of parameters with realistic stochastic model can objectively reflect the actual precisions of parameter estimates, which is rather important for solution evaluation in real applications.
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页码:229 / 235
页数:7
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