Taiwan Online Precise Point Positioning Service: Methodology and Test Results
Publication: Journal of Surveying Engineering
Volume 150, Issue 3
Abstract
Online precise point positioning (PPP) computation services can bring substantial benefits to surveying engineering and its applications. This study introduces Taiwan’s first online PPP service, named Taiwan Online Precise Point Positioning Service (TOPS). TOPS uses a between-satellite single-differenced (BSSD) PPP model to process dual-frequency Global Positioning System (GPS) and Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS) measurements. Moreover, this study proposes a method of geodetic datum transformation from the International Terrestrial Reference Frame (ITRF) to Taiwan Geodetic Datum 1997 at epoch 2010.0 (denoted as TWD97[2010]), which is one of Taiwan’s official coordinate systems. The positioning performance of TOPS was tested. Results demonstrated that in terms of daily solutions, TOPS can provide accuracy comparable with that of other online services such as the Canadian Spatial Reference System Precise Point Positioning (CSRS-PPP). The positioning results were transformed from ITRF to TWD97[2010] and compared with predetermined fiducial coordinates, and the results indicated that although the largest discrepancy in the horizontal direction was about 5 cm, the overall accuracy of the transformation can satisfy the requirement of horizontal control surveys in Taiwan.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors are grateful to Prof. K. H. Chen of National Taipei University, Taiwan for important discussions and suggestions. The authors are also indebted to the National Science and Technology Council, Taiwan for grants MOST 110-2221-E-006-071-MY3 and MOST 110-2221-E-004-004-MY3.
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Information & Authors
Information
Published In
Journal of Surveying Engineering
Volume 150 • Issue 3 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 12, 2023
Accepted: Feb 6, 2024
Published online: Jun 4, 2024
Published in print: Aug 1, 2024
Discussion open until: Nov 4, 2024
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