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- W3107264904 abstract "Applications of satellites navigation system are expending rapidly, and Galileo should play a significant role in that development. Among the wide range of applications of such system, transportation in urban environment seems to be one of the most prominent Investigating the receiver performance in this medium requires a model of wave propagation. A deterministic method, based on geometrical optic, has been selected and allows to model the environment in 3D and multipath propagation to the desired level of accuracy. The urban environment is characterized by high masking angles and the presence of a great number of obstacles which produce multipath. We may assume that an urban user needs an availability greater than 90% with an accuracy better than 10 meters. However meeting this objective is not generally an easy task since the urban medium presents quite constraining conditions which do not always enable to compute the user location at the level of accuracy required. So several types of solutions to improve the system performance are considered in this paper. These solutions are to complement the Galileo constellation with GPS satellites and the use of additional sensor like baro-altimeter or dead reckoning, differential stations or pseudolites." @default.
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- W3107264904 date "2001-09-14" @default.
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- W3107264904 title "Galileo Performance Improvement for Urban Users" @default.
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