Future Satellite Navigation System Architecture - System Performance

T. Beck, H.L. Trautenberg, F. Soualle, F. Amarillo, L. Stopfkuchen, D. Felbach, A. Fernandez, P. Poirier, L. Montoya, L. Greda, A. Konovaltsev, J. Hammesfahr

Abstract:	The Galileo project is currently finalizing its design and development phase with the related major segment CDR (Critical Design Review) milestones that have been successfully passed for the Ground Mission Segment and the Test User Segment in 2008 and which will be finalized in 2009/2010 for the Space Segment. Anticipating a replenishment of Galileo initial system satellites after ten years of operation and based on a start of the first Galileo IOV satellite in 2010, the second generation satellites should be available at the beginning of 2020. Thus enhancements on Galileo are currently already under detailed assessment. To improve the currently projected Galileo system different alternatives and innovative technologies, methods, concepts, and algorithms for satellite navigation have been investigated in a related study of ESAs GNSS evolution program, which was led by Astrium GmbH. A future Galileo architecture has been defined and elaborated. Its new functionalities compared to the current Galileo architecture are: • Inter-satellite ranging measurements • Satellite time scale generation by clock ensemble • On-board clock and on-board signal monitoring capabilities • GPS correction data via commercial service • Local single frequency C-band service • Multi-beam ground segment antenna Within the paper a detailed overview of the necessary updates of the ground and space functions as well as of ground and space technologies is presented. The mentioned system improvements have major impacts on system performance contributors and thus in the end on the overall Galileo system performance. The system performance has been analyzed in depth for different services for global, regional and local scenarios and is presented within this paper. Furthermore, the system performance of two Galileo constellations with 36 satellites has been analyzed. The conclusions on the overall system performance are also presented and discussed within this paper. The reduction of the ground monitoring network is a potential result of the new technologies. A significant reduction of the ground segment was expected and is presented within this paper for a LPV200 test scenario. As a conclusion, a future system architecture for Galileo using new and innovative technologies is presented as well as the significant system performance improvements that can be achieved.
Published in:	Proceedings of the 2010 International Technical Meeting of The Institute of Navigation January 25 - 27, 2010 Catamaran Resort Hotel San Diego, CA
Pages:	987 - 1001
Cite this article:	Beck, T., Trautenberg, H.L., Soualle, F., Amarillo, F., Stopfkuchen, L., Felbach, D., Fernandez, A., Poirier, P., Montoya, L., Greda, L., Konovaltsev, A., Hammesfahr, J., "Future Satellite Navigation System Architecture - System Performance," Proceedings of the 2010 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2010, pp. 987-1001.
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