“…The satellite link uncertainty in y(UTC(NMIJ) − TAI) was calculated to be 2.3 × 10 −15 for T link = 25 days, 2.0 × 10 −16 for T link = 30 days, and 1.7 × 10 −16 for T link = 35 days using the recommended formula ( √ 2u A )/[(3600 × 24 × 5)( T link 5 ) 0.9 ] [16] with the statistical uncertainty u A = 0.3 ns reported in Circular T. The statistical and systematic uncertainties of y(TAI − SI) were calculated from the total uncertainty of y(TAI − SI) and the systematic uncertainties of the primary and secondary frequency standards reported in Circular T. During the present half-year period, the frequency of TAI was calibrated by using the following frequency standards: Cs thermal beam clocks (PTB-Cs1 and PTB-Cs2 [59]), Cs fountain clocks (SYRTE-FO1, SYRTE-FO2, SYRTE-FOM [60], PTB-CSF1, PTB-CSF2 [61], SU-CsFO2 [62], and NIM5 [63]), a Rb fountain clock (SYRTE-FORb [64]), and a Sr optical lattice clock (NICT-Sr1 [29]). Since Circular T only provides the total uncertainty of y(TAI−SI), the systematic uncertainty of y(TAI − SI) was estimated using the systematic uncertainties and weights of the individual frequency standards based on a method described in Ref.…”