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Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

Msaewe, Hussein Alwan; Hancock, Craig M.; Psimoulis, Panos; Roberts, Gethin Wyn; Bonenberg, Lukasz; de Ligt, Huib

Authors

Hussein Alwan Msaewe

Craig M. Hancock

Panos Psimoulis panagiotis.psimoulis@nottingham.ac.uk

Gethin Wyn Roberts

Lukasz Bonenberg

Huib de Ligt



Abstract

GPS is the positioning tool of choice for a wide variety of applications where accurate (cm level or less) positions are required. However GPS is susceptible to a variety of errors that degrade both the quality of the position solution and the availability of these solutions. The contribution of additional observations from other GNSS systems may improve the quality of the positioning solution. This study investigates the contribution of the GLONASS and BeiDou systems and the potential improvement to the precision achieved compared to positioning using GPS only measurements. Furthermore, it is investigated whether the combination of the satellite systems can limit the noise level of the GPS-only solution. A series of zero-baseline measurements, of 1 Hz sampling rate, were recorded with different types of pairs of receivers over 12 consecutive days in the UK and in China simultaneously. The novel part in this study is comparing the simultaneous GNSS real measurements recorded in the UK and China. Moreover, the correlation between the geometry and positional precision was investigated.

The results indicate an improvement in a multi-GNSS combined solution compared to the GPS-only solution, especially when the GPS-only solution derives from weak satellite geometry, or the GPS-only solution is not available. Furthermore, all the outliers due to poor satellite coverage with the individual solutions are limited and their precision is improved, agreeing also with the improvement in the mean of the GDOP, i.e. the mean GDOP was improved from 3.0 for the GPS only solution to 1.8 for the combined solution. However, the combined positioning did not show significant positional improvement when GPS has a good geometry and availability.

Journal Article Type Article
Publication Date May 1, 2017
Journal Measurement
Print ISSN 1536-6367
Electronic ISSN 0263-2241
Publisher Taylor & Francis (Routledge)
Peer Reviewed Peer Reviewed
Volume 102
APA6 Citation Msaewe, H. A., Hancock, C. M., Psimoulis, P., Roberts, G. W., Bonenberg, L., & de Ligt, H. (2017). Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach. Measurement, 102, doi:10.1016/j.measurement.2017.02.004
DOI https://doi.org/10.1016/j.measurement.2017.02.004
Keywords Zero baseline; Multi-GNSS; Noise; Precision; DOP values; Correlations
Publisher URL http://www.sciencedirect.com/science/article/pii/S0263224117300933
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0



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