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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.
Acknowledgements
The authors would like to thank Mr. Peter Saunders from Photomapping Services Australia for providing the airborne GPS LiDAR data that were used in the analysis. The contribution of data from the IGS, GA, ESA/EOC, and IAC is also greatly appreciated. The authors gratefully acknowledge the two anonymous reviewers for carefully reading the manuscript and providing constructive feedback.