BeiDou B2/Galileo E5b短基线紧组合相对定位模型及性能评估

doi:10.11947/j.AGCS.2016.F020

测绘学报 ›› 2016, Vol. 45 ›› Issue (S2): 1-11.doi: 10.11947/j.AGCS.2016.F020

• 论文 • 下一篇

BeiDou B2/Galileo E5b短基线紧组合相对定位模型及性能评估

张小红^1,2,3, 吴明魁¹, 刘万科^1,2,3

1. 武汉大学测绘学院, 湖北武汉 430079;
2. 地球空间信息技术协同创新中心, 湖北武汉 430079;
3. 武汉大学测绘学院导航定位技术研究中心, 湖北武汉 430079

收稿日期:2016-11-25 修回日期:2016-12-20 出版日期:2017-01-31 发布日期:2017-05-20
通讯作者: 刘万科 E-mail:wkliu@sgg.whu.edu.cn
作者简介:张小红(1975-),男,博士,教授,研究方向为卫星导航与精密定位技术。E-mail:xhzhang@sgg.whu.edu.cn
基金资助:
国家重点研发计划（2016YFB0501803）；国家自然科学基金（91638203）；湖北省自然科学杰出青年基金（2015CFA039）

Model and Performance Analysis of Tightly Combined BeiDou B2 and Galileo E5b Relative Positioning for Short Baseline

ZHANG Xiaohong^1,2,3, WU Mingkui¹, LIU Wanke^1,2,3

1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
2. Collaborative Innovation Centre for Geospatial Technology, Wuhan 430079, China;
3. Research Center of Positioning and Navigation Technology, School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China

Received:2016-11-25 Revised:2016-12-20 Online:2017-01-31 Published:2017-05-20
Supported by:
The National Key Research and Development Program of China (No. 2016YFB0501803), The National Nature Science Foundation of China (No. 91638203), and The Natural Science Foundation for Distinguished Young Scholar of Hubei Province (No. 2015CFA039)

摘要/Abstract

摘要：

随着GPS和GLONASS系统的现代化以及Galileo和BeiDou卫星导航系统的建设，GNSS正朝多频多系统的方向发展。本文对BeiDou B2/Galileo E5b短基线紧组合相对定位的模型与算法进行了研究，详细推导了BeiDou B2/Galileo E5b短基线紧组合相对定位的模型与算法，并对其定位性能进行了分析。重点分析了BeiDou B2与Galileo E5b频点的接收机间差分系统间偏差的长期稳定性，结果表明：基线两端的接收机类型（包括固件版本）相同时，差分系统间偏差接近于0；基线两端的接收机类型不同时，差分系统间偏差较大，但具有长期稳定性，因此能够事先标定并作为改正数用于后续的定位中。最后基于BeiDou B2/Galileo E5b单频单历元相对定位试验对系统间紧组合模型的定位效果进行了比较验证。结果表明，相对于传统的松组合模型，使用改正系统间偏差的紧组合模型能够显著提高模糊度固定的成功率，尤其是在遮挡比较严重、单系统可观测到的卫星数较少的情况下，模糊度固定成功率可以提高10%~25%。

关键词: 北斗, 伽利略, 紧组合, 差分系统间偏差, 相对定位

Abstract:

With the modernization of GPS and GLONASS, and construction of Galileo and BeiDou, multi-frequency multi-GNSS is a trend. For the first time this paper investigates the model, algorithm, and performance of tightly combined relative positioning using BeiDou B2 and Galileo E5b observations for short baselines. The model and algorithm was first deduced in detail. Then the long stability of between-receivers differential inter-system bias (DISB) between BeiDou B2 and Galileo E5b observations was analyzed emphatically. It is shown that for baselines with identical receivers (the same firmware version), the DISB is close to zero; for baselines with different receiver types, the DISB is significant but with long stability, which allows for a-prior calibration of these DISBs. Finally, the performance of tightly combined positioning was evaluated using single frequency BeiDou B2 and Galileo E5b observations in an instantaneous approach. It is demonstrated that the DISB corrected tightly combined model can significantly improve the ambiguity resolution performance with respect to the loosely combined model. The improvement can be especially significant (10%~25%) under environments where the navigation signals are serious blocked or the observed satellite for each system is limited.

Key words: Beidou(BDS), Galileo, tightly combined, differential inter-system bias(DISB), relative positioning

中图分类号:

P288

张小红, 吴明魁, 刘万科. BeiDou B2/Galileo E5b短基线紧组合相对定位模型及性能评估[J]. 测绘学报, 2016, 45(S2): 1-11.

ZHANG Xiaohong, WU Mingkui, LIU Wanke. Model and Performance Analysis of Tightly Combined BeiDou B2 and Galileo E5b Relative Positioning for Short Baseline[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S2): 1-11.

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BeiDou B2/Galileo E5b短基线紧组合相对定位模型及性能评估

Model and Performance Analysis of Tightly Combined BeiDou B2 and Galileo E5b Relative Positioning for Short Baseline

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