The emerging Global Navigation Satellite Systems (GNSSs) can enhance single-frequency (SF) real-time kinematic (RTK) precise (centimetre-level) positioning. In this presentation the performance of low-cost (few hundred USDs) RTK receivers is presented. These low-cost GNSS receivers can track the American GPS, Chinese BDS, European Galileo and Japanese QZSS. A smartphone implementation of one the SF RTK receivers is also evaluated. The significant reduction in cost can increase the number of receivers that can be deployed, which would benefit atmospheric sciences (ionosphere and troposphere, as well as weather prediction), surveying, geophysics (deformation monitoring), unmanned aerial vehicle (UAV) applications, precise car navigation, and precision farming, to name a few examples. Results derived from real data with ionospheric disturbances at low, medium and high levels will be presented. It will be demonstrated that the low-cost SF RTK performance is competitive to that of more expensive (thousands of USDs) dual-frequency (DF) GPS receivers and antennas under such conditions, and for the baselines at hand. Finally, the future of low-cost RTK receivers is discussed.
Bio:
Robert teaches Geodesy and Least-squares adjustment theory, and conducts research in Global Navigation Satellite Systems (GNSSs). Robert joined the School of Surveying as a Lecturer in 2015, and was appointed Senior Lecturer from 2018. Robert is a member of the 10-member International Association of Geodesy (IAG) ICCT Joint Study Group “Multi-GNSS Theory and Algorithms”. His research interests involve deriving mathematical models for the combination of different countries’ RNSSs/GNSSs. Particular emphasis of his research is on the positioning performance using smartphones and low-cost receivers in New Zealand, as one of the few countries in the world with a good visibility of all GNSSs.
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