GALILEO Augmentation for a Precise Positioning Application

R. Jones, D. Price

Abstract:	The paper addresses aspects of the design of GALILEO augmentation systems and the resultant services that may be delivered to future users of precise positioning. Following some brief contextual information relating to the GALILEO project, its core system and Local Elements (augmentations), the paper identifies a key application and discusses the performance and business needs of the main user community. The service delivery business model appropriate to this user community is then described. The paper then addresses the GALILEO signals in space together with those anticipated to be available from modernised GPS that are relevant to commercial precise positioning in the 2008-2010 time frame. A potential GALILEO Local Element (LE) architecture is then described. An assessment of the performance achievable by this architecture is then presented. The results of various simulations using the described GNSS signals and Real Time Kinematic (RTK) architecture are presented. The simulation scenarios explore the affects on positioning accuracy and robustness of varying key parameters including baseline lengths, error magnitudes, network design, numbers of frequencies used, RTK algorithm used, use of Three Carrier Ambiguity Resolution (TCAR) and choice of constellations. Finally, conclusions and recommendations for the future of off-shore precise positioning augmentation systems resulting from this study are presented. This paper is based upon work conducted within European Commission (EC) and European Space Agency (ESA) funded GALILEO studies. The views expressed are the opinions of the authors and do not reflect EC/ESA policy.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	579 - 592
Cite this article:	Jones, R., Price, D., "GALILEO Augmentation for a Precise Positioning Application," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 579-592.
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