GNSS rover receivers’ horizontal positioning accuracy assessments based on NRTK-VRS surveying

Abstract

This research investigates a horizontal positioning accuracy obtained from the NRTK-VRS GNSS positioning technique. Measured and computed RMSEs are compared based on the data obtained from 2122 test points within the GNSS CORS network. Rover controllers and receivers have been applied for positioning solutions at every designed test point and their corresponding RMSE measurements. This work compares the measured and computed RMSEs based on this network real-time positioning. Result shows that the 1.5 cm of measured RMSE from the controller is equivalent to 3.4 cm of the computed horizontal positioning accuracy; therefore, the scale factor is 2.27.

Keywords:

• Receiver horizontal positioning accuracy
• NRTK-VRS GNSS positioning services
• Cadastral surveying Thailand

Acknowledgements

We thank DOL for providing GNSS observations and measurement results to this research to analyse and evaluate the positioning accuracy of the countrywide NRTK-VRS GNSS positioning services. Moreover, the techniques supported by CHC NAVTECH, THAILAND, are much appreciated.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Teetat Charoenkalunyuta

Teetat Charoenkalunyuta holds a PhD degree in Geomatics Engineering from Chulalongkorn University. He is an assistant professor at Department of Survey Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. His research interests are in GNSS surveying, CORS system and Cadastral Surveying.

Chalermchon Satirapod

Chalermchon Satirapod holds a PhD in GNSS Surveying from the University of New South Wales (UNSW), Australia. He is currently serving as a full professor at Department of Survey Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. His research interests are new GNSS data processing techniques and quality assured GNSS surveying for a range of static and kinematic applications.

Namphon Saksanit

Namphon Saksanit holds a master’s degree in GNSS surveying from Chulalongkorn University. He is now working at the Royal Thai Survey Department, Bangkok, Thailand.

Thayathip Thongtan

Thayathip Thongtan obtains a PhD in Geomatics Engineering from University College London. She currently serves as an electrical metrologist at time and frequency laboratory, National Institute of Metrology Thailand.