Designing a Multimodal GNSS Based on Optimal Cost Efficiency to All Users

Jacqueline Doble

Abstract:	In designing architectures for future GNSS, too much emphasis is often given to air transport requirements for GNSS and little to the needs of other users such as rail, road and marine. The problem with this approach is that aviation requirements are probably the most stringent of any user sector and therefore any architecture designed to meet such requirements is in danger of imposing an over performing and over costly system on the majority of users who are unable to realize matching benefits. The official view of IATA is that the airline community does not want to pay for the whole cost of the system. However if other users do not benefit from a system built to meet high RNP it would not be appropriate to pass these costs on to these lower end users. It would be more effective to design the base system to meet (and not exceed) the requirements for a maximum amount of users, with system elements to meet any more stringent requirements being paid for and developed only by the user community concerned. The problem is that today no-one knows what such an optimal system would comprise. This paper proposes a methodology to determine via a unique cost benefit technique an optimized multimodal GNSS architecture. In this approach a Required Navigation Performance index shall be applied across all user sectors. This methodology represents a new approach to cost benefit analysis: Not only is it the first time a GNSS study of this nature has tried to look at the benefits of GNSS for non- aviation users, but also in doing so it aims to help design the future GNSS by reaching a compromise between technical performance and deliverable benefits to the total user base. This study which is being financed by the EUROPEAN COMMISSION, is expected to have significant input into European GNSS 2 research programmes.
Published in:	Proceedings of the 1996 National Technical Meeting of The Institute of Navigation January 22 - 24, 1996 Loews Santa Monica Hotel Santa Monica, CA
Pages:	443 - 445
Cite this article:	Doble, Jacqueline, "Designing a Multimodal GNSS Based on Optimal Cost Efficiency to All Users," Proceedings of the 1996 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1996, pp. 443-445.
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