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Year 2025
 
Vol 66, Issue 5, [10 - 2025]

Determining the displacement velocity of some continuously operating reference stations (CORS) in Vietnam in the period 2019÷2024 using the Precise Point Positioning method

DOI:10.46326/JMES.2025.66(5).08

  • Affiliations:

    1 Department of Geomatics Engineering, Ho Chi Minh City University of Technology, Vietnam
    2 Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 16th-Apr-2025
  • Revised: 29th-July-2025
  • Accepted: 18th-Aug-2025
  • Online: 1st-Oct-2025
Pages: 89 - 97
Views: 57
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Abstract:

Precise knowledge of tectonic motion allows us to better understand the mechanism of Earth's crustal deformation and dynamics. The modern method commonly used to determine the velocity of tectonic plate movement today is Precise Point Positioning (PPP). We use the online service of the Canadian Ministry of Natural Resources CSRS - PPP to process GNSS data of 12 Continuously Operating Reference Stations (CORS) in Vietnam during the period 2019÷2024. These CORSs are managed by Tuong Anh Company and are evenly distributed throughout the territory. The PPP processing results show that the time series of the North, East and Up components of the CORS stations fluctuate with a period of approximately 1 year. After modeling this variation with a sine function with a fixed period of 351.6 days, we calculated the average displacement velocity of the stations as (-8.8, +29.6, -3.1) mm/year in the North, East and Up components. Compared to the period 2019÷2022, the displacement velocity of the tectonic plate is almost unchanged in direction and magnitude. The deviation in the horizontal components is 1 mm/year and the Up is 1.6 mm/year. In order to avoid possible effects due to the conversion of the ITRF 2014 to ITRF 2020 on November 27, 2022, we calculated the displacement velocity for the period 12/2022÷9/2024. This result gives an average deviation compared to the period 2019÷2024 in the horizontal and up components of 1mm/year and 3mm/year. It proves the model fit and the correctness of the applied coordinate transformation parameter set.

How to Cite
., L.Ngoc Nguyen and ., V.Dinh Trinh 2025. Determining the displacement velocity of some continuously operating reference stations (CORS) in Vietnam in the period 2019÷2024 using the Precise Point Positioning method (in Vietnamese). Journal of Mining and Earth Sciences. 66, 5 (Oct, 2025), 89-97. DOI:https://doi.org/10.46326/JMES.2025.66(5).08.
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