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2013•Journal of Spatial ScienceRequires access

A comparison between GPS-only and combined GPS+GLONASS Precise Point Positioning

Suelynn Choy, Shaocheng Zhang, François Lahaye, Pierre Héroux

Open publisher page 41 citations

Abstract

The benefits and challenges of a combined GPS and GLONASS Precise Point Positioning (PPP) system in post-processed static and kinematic modes are analysed and identified. Different elevation cut-off angles are applied to simulate satellites' availability in different sky view conditions. The results show that for kinematic PPP, the addition of GLONASS observations could speed up the solution convergence time and improve the accuracy and precision of the position estimates. However, for daily static PPP, the benefits of integrating GLONASS to the current GPS-only PPP system are marginal as the 24-hour cumulative satellite coverage is near-optimal with the current GPS constellation.

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What this paper is about

The benefits and challenges of a combined GPS and GLONASS Precise Point Positioning (PPP) system in post-processed static and kinematic modes are analysed and identified. Different elevation cut-off angles are applied to simulate satellites' availability in different sky view conditions. The results show that for kinematic PPP, the addition of GLONASS observations could speed up the solution convergence time and improve the accuracy and precision of the position estimates. However, for daily static PPP, the benefits of integrating GLONASS to the current GPS-only PPP system are marginal as the 24-hour cumulative satellite coverage is near-optimal with the current GPS constellation.

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Available abstract

The benefits and challenges of a combined GPS and GLONASS Precise Point Positioning (PPP) system in post-processed static and kinematic modes are analysed and identified. Different elevation cut-off angles are applied to simulate satellites' availability in different sky view conditions. The results show that for kinematic PPP, the addition of GLONASS observations could speed up the solution convergence time and improve the accuracy and precision of the position estimates. However, for daily static PPP, the benefits of integrating GLONASS to the current GPS-only PPP system are marginal as the 24-hour cumulative satellite coverage is near-optimal with the current GPS constellation.

Key concepts: GLONASS, Global Positioning System, Precise Point Positioning, Real Time Kinematic, Geodesy, Computer science, Convergence (economics), Satellite

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