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Performance assessment of GPS/GLONASS single point positioning in an urban environment

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Abstract

In signal-degraded environments such as urban canyons and mountainous area, many GNSS signals are either blocked or strongly degraded by natural and artificial obstacles. In such scenarios standalone GPS is often unable to guarantee a continuous and accurate positioning due to lack (or the poor quality) of signals. The combination of different GNSSs could be a suitable approach to fill this gap, because the multi-constellation system guarantees an improved satellite availability compared to standalone GPS, thus providing enhanced accuracy, continuity and integrity of the positioning. The present GNSSs are GPS, GLONASS, Galileo and Beidou, but the latter two are still in the development phase. In this work GPS/GLONASS systems are combined for single point positioning and their performance are assessed for different configurations. Using GPS/GLONASS multi-constellation implies the addition of an additional unknown, i.e. the intersystem time scale offset, which requires a sacrifice of one measurement. Since the intersystem offset is quasi-constant over a short period, a pseudo-measurement can be introduced to compensate the sacrifice.

The benefit after adding a pseudo-measurement has been demonstrated in a vehicular test.

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Acknowledgements

The authors would like to thank the PLAN group (Position, Location And Navigation Group) of University of Calgary (Canada) for their valuable contribution and support and for providing the test equipment.

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Authors and Affiliations

  1. Department of Applied Sciences, “Parthenope” University of Naples, Napoli, Italy

    A. Angrisano, S. Gaglione & C. Gioia

Authors
  1. A. Angrisano
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  2. S. Gaglione
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  3. C. Gioia
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Corresponding author

Correspondence to S. Gaglione.

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Angrisano, A., Gaglione, S. & Gioia, C. Performance assessment of GPS/GLONASS single point positioning in an urban environment. Acta Geod Geophys 48, 149–161 (2013). https://doi.org/10.1007/s40328-012-0010-4

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  • DOI: https://doi.org/10.1007/s40328-012-0010-4

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