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A Regional Space Segment Health Monitor for Local GPS Integrity Monitoring

Published online by Cambridge University Press:  12 September 2011

Carl Milner ,
Washington Ochieng ,
Wolfgang Schuster ,
Marco Porretta  and
Charles Curry
Carl Milner
Affiliation:
(Imperial College London)
Washington Ochieng*
Affiliation:
(Imperial College London)
Wolfgang Schuster
Affiliation:
(Imperial College London)
Marco Porretta
Affiliation:
(Ingegneria Dei Sistemi SpA)
Charles Curry
Affiliation:
(Chronos Technology Limited)
*
(Email: [email protected])
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Abstract

The benefits of Global Navigation Satellite Systems (GNSS) and in particular GPS have been demonstrated worldwide, and continue to accrue in the form of new applications. Today, some mission critical applications (largely driven by safety) mostly in aviation and to a lesser extent maritime, rely on a number of techniques for the provision of integrity monitoring services. However, for many applications such as those associated with the emergency services, road user charging and personal navigation devices, no such monitoring exists and service validation is limited due to technical and cost constraints. The problem is exacerbated by a recent increase in more challenging problems, particularly in the security industry, in which jamming devices have been used to disrupt the use of GPS. This paper presents a new approach for a cost effective local solution to the problems above, at the individual user level, by providing the user with information on Quality of Service (QoS). The approach is based on the deployment of a single or network of probes supported by an existing regional network. The probes communicate with a central server and are designed to detect localised events whilst the regional network isolates space segment anomalies. The latter is addressed in detail in this paper in terms of design methodology and performance, using the Ordnance Survey's UK GNSS network.

Keywords

Integrity MonitoringJammingClock Anomaly
Type
Research Article
Information
The Journal of Navigation , Volume 64 , Issue 4 , October 2011 , pp. 657 - 671
Copyright
Copyright © The Royal Institute of Navigation 2011

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References

REFERENCES

Beyerle, G., Ramatschi, M., Galas, R., Schmidt, T., Wickert, J. and Rothacher, M. (2009) “A Data archive of GPS navigation messages” GPS Solutions 13, 35–41CrossRefGoogle Scholar
Doherty, P., Raffi, E., Klobuchar, J. and El-Arini, M.B., (1994). Statistics of time rate of change of ionospheric range delay. In: Proceedings of ION GPS-94, Part 2, Salt Lake City 1589Google Scholar
Feng, S. and Ochieng, W. (2006) “An Efficient Worst User Location Algorithm for the Generation of the Galileo Integrity Flag” The Journal of Navigation, 59, 381–394CrossRefGoogle Scholar
Hofman-Wellenhof, B., Lichtenegger, H., Collins, J. (2001). “GPS Theory and Practice.” Springer-Verlag.Google Scholar
Malys, S., Lazeros, M., Gottschalk, S., Mobbs, S., Winn, B., Feess, W., Menn, W., Swift, E., Merrigan, M., Mathon, W. (1997) “The GPS Accuracy Improvement Initiative” Proceedings of the 10th International Technical Meeting of the satellite division of the institute of navigation, ION-97, Kansas City, 16–19 SeptemberGoogle Scholar
Milner, C. (2009) Determination of the Effects of GPS Failures on Aviation Applications, PhD Thesis, University of London (Imperial College London)Google Scholar