Abstract
Precise point positioning (PPP) employs readily available Global Navigation Satellite System (GNSS) orbit- and clock-correction products to perform point positioning using a single GNSS receiver. Recently, attention has turned to ambiguity-resolved real-time PPP (AR-RT-PPP), allowing PPP to potentially offer a viable alternative to real-time kinematic (RTK) positioning provided by local or regional Continuously Operating Reference Station (CORS) networks. Using an extensive data set covering all of New South Wales (NSW), Australia, this paper showed that AR-RT-PPP is achievable, on average providing positioning quality down to a few centimeters with an average ambiguity-resolution success rate of 84.3% and average convergence times of between 40 min and 1 h. The paper highlighted the advantages and disadvantages of this positioning technique from a user’s perspective and then outlined the current limitations and possible future direction of AR-RT-PPP as a fill-in service for sparser local or regional CORS networks.
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Data Availability Statement
Some or all data, models, or code used during the study were provided by a third party (modified RTKLIB software, real-time correction products). Direct requests for these materials may be made to the provider as indicated in the Acknowledgements.
Acknowledgments
Dr. Ken Harima of RMIT University, Melbourne, is gratefully acknowledged for providing the modified RTKLIB software used in this study. The International GNSS Service is thanked for providing the real-time correction products required for PPP processing.
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Published In
Journal of Surveying Engineering
Volume 146 • Issue 2 • May 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Apr 15, 2019
Accepted: Nov 4, 2019
Published online: Feb 19, 2020
Published in print: May 1, 2020
Discussion open until: Jul 19, 2020
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