Future GNSS Constellation Performances inside Urban Environments

Íñigo Ballester-Gúrpide, Esperanza Herráiz-Monseco, Andrés Juez-Muñoz, Miguel M. Romay-Merino and Theresa W. Beech

Abstract:	Recent research analyses done in EC and ESA projects indicate that satellite navigation systems have their biggest market potential in the road transportation domain. The estimated European road market valuation during 1998-2007 is about $17.7 billion versus an aviation market valuation of about $4.7 billion for the same time period [Ref. 4]. With that prospect, the Galileo constellation objective is not only to satisfy aviation user needs, in addition to that, road user needs must be carefully analysed. Galileo by itself might not satisfy the road user needs inside urban canyons, as it can be difficult to have four or more satellites in view in most circumstances. The benefit of using Galileo in combination with other GNSS systems such as GPS will be analysed using a powerful constellation performance analysis tool (Elcano). This paper describes the results of the several simulations performed in order to study the accuracy levels given by the proposed Galileo constellation. Different urban environments will be analysed in order to identify the benefit of the combination of the various GNSS systems, and in particular to assess the possibility of avoiding the use of external sensors like odometers. Please notice that only geometrical considerations have been taken into account in this analysis. Factors such as multi-path and signal degradation have not been considered. Keywords: Galileo, GNSS (Global Navigation Satellite Systems), urban canyons, urban environments, performances.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2436 - 2445
Cite this article:	Ballester-Gúrpide, Íñigo, Herráiz-Monseco, Esperanza, Juez-Muñoz, Andrés, Romay-Merino, Miguel M., Beech, Theresa W., "Future GNSS Constellation Performances inside Urban Environments," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2436-2445.
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