Presentation Information
[23p-P05-57]Calibration of International Atomic Time by the atomic fountain primary frequency standard, NMIJ-F2
〇Akifumi Takamizawa1, Shinya Yanagimachi1, Ken Hagimoto1 (1.NMIJ AIST)
Keywords:
atomic fountain primary frequency standard,International Atomic Time,uncertainty evaluation
We have developed the cesium atomic fountain primary frequency standard, NMIJ-F2, which is our second fountain, to contribute to the calibration of International Atomic Time (TAI). The type A and type B relative uncertainties were evaluated to be 2.3 × 10−13 τ−1/2 (τ: averaging time) and 4.6 × 10−16, respectively. The reports of the frequency data to BIPM for calibration of TAI was started, and 17 reports were published by Dec. 2023.