籍利平 编译 资料来源: ITRF | Itrf2020-u2024 ITRF2020-u2024 is the second ITRF020 update, generated by adding four years (2021.0 – 2025.0) of data after the end of the ITRF2020 input data. The four Technique Centers (IDS, IGS, ILRS, IVS) who provided four years of extended time series of ...