<![CDATA[The International Terrestrial Reference Frame (ITRF) is a global reference framework essential for maintaining the consistency and precision of positioning results in response to ongoing geodynamic changes. The adoption of ITRF2020 requires updates to geodetic control point coordinates to ensure compliance with international reference standards. This study aims to update the benchmark coordinates at Itera based on the ITRF2020 global reference frame. Observations were conducted using the static GNSS network method constrained to InaCORS and IGS reference stations. Observation data quality was evaluated using TEQC to assess multipath effects and ionospheric delay-related parameters. The data were then processed with GAMIT/GLOBK, and the resulting coordinates were transformed from ITRF2014 to ITRF2020. Benchmark points ITR01, ITR06, and ITR12 exhibited relatively poor quality control results, characterized by high multipath values and numerous IOD and cycle-slip occurrences. The coordinates of the 17 Benchmark points observed in 2025 were successfully updated. Horizontal positional precision ranged from 0.0001 to 0.041 m, while the largest vertical precision value was 0.337 m at ITR05. Coordinate changes between ITRF2014 and ITRF2020 were generally 0.001–0.002 m, except at ITR12, where the change reached 0.119 m, requiring further evaluation and re-observation. Improving network geometry is recommended to enhance positioning precision and support infrastructure development at Itera.]]>
Copyrights © 2026
