| Title: | Absolute frequency measurement of the 87Sr optical lattice clock at NTSC using international atomic time |
| First author: | LU Xiaotong |
| Page number: | 1-7 |
| Issue: | 015008 |
| PubYear: | 2023 |
| Volume: | 60 |
| Impact factor: | |
| Publication name: | |
| Abstract: | We report the absolute frequency measurement of the 5s21S0 → 5s5p3P0 transition in 87Sr optical lattice clock (Sr1) at National Time Service Center. Its systematic frequency shifts are evaluated carefully with a total relative uncertainty of 5.1 × 10-17. The measured absolute frequency is 429 228 004 229 872.91(18) Hz with a relative uncertainty of 4.1 × 10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a global navigation satellite system link. |