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Advanced Transport Telematics Positioning Requirements: An Assessment of GPS Performance in Greater London

Published online by Cambridge University Press:  01 September 1999

W. Y. Ochieng ,
P. J. Shardlow  and
Gordon Johnston
W. Y. Ochieng
Affiliation:
Imperial College of Science, Technology and Medicine
P. J. Shardlow
Affiliation:
Racal Survey Limited
Gordon Johnston
Affiliation:
Racal Survey Limited
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Abstract

This paper presents the results of a study carried out in the Greater London area to assess and characterise the performance of the Global Positioning System (GPS) for vehicle positioning in urban areas. The performance assessment addresses, in varying levels of detail, the issues of service coverage, positioning accuracy, integrity and availability of service. The project was supported by Racal Survey Limited and is part of the wider research at Imperial College in the area of architectural design and testing of Advanced Transport Telematics (ATT) systems. The results highlight the shortcomings of GPS as the sole means for in-car navigation in urban areas and details the temporal and spatial considerations to be taken into account in the process of designing an integrated positioning system capable of meeting navigation requirements placed on ATT systems.

Keywords

1. GPS2. GNSS3. Telematics4. Trials
Type
Research Article
Information
The Journal of Navigation , Volume 52 , Issue 3 , September 1999 , pp. 342 - 355
Copyright
© 1999 The Royal Institute of Navigation

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