# Estimate of d by individual PSFS measurements and corresponding uncertainties. # All values are expressed in 10^-15 and are valid for the stated period of estimation. # Values are reported as published in Circular T. # 'YYMM' stands for the year 20YY and month MM of the Circular T in which the measurement was published. # For Secondary Frequency Standard, 'Year(uS)' stands for the year of the recommendation of the updates to the list of the standard frequencies #-------------------------------------------------------------------------------------------------------------------------- # Standard Period of d uA uB ul/Lab ul/Tai u uSrep Ref(uB) uB(Ref) Steer Year(uS) YYMM Uptime # NPLI-CsF1 Estimation #-------------------------------------------------------------------------------------------------------------------------- NPLI-CsF1 56679 56689 -0.27 0.93 2.36 0.19 0.53 2.60 PFS/NA [1] 2.5 Y 1411 NPLI-CsF1 57319 57329 -3.88 0.90 2.82 0.19 0.53 3.01 PFS/NA [1] 2.50 Y 1511