Last TP Data Published by BIPM

Coordinated Universal Time UTC and its local realization UTC(TP). Computed values of [UTC−UTC(TP)] and uncertainties valid for the period of this Circular.

From 2006 January 1, 0h UTC, TAI−UTC = 33 s. From 2009 January 1, 0h UTC, TAI−UTC = 34 s.

UTC−UTC(TP), ns
Date 0h UTC Dec 29 Jan 3 Jan 8 Jan 13 Jan 18 Jan 23 Jan 28 Uncertainty/ns
MJD 55559 55564 55569 55574 55579 55584 55589 uAuBu
  2.8 0.4 −3.5 −0.3 1.2 −3.0 1.8 0.55.35.3
Date 0h UTC Jan 28 Feb 2 Feb 7 Feb 12 Feb 17 Feb 22 Feb 27 Uncertainty/ns
MJD 55589 55594 55599 55604 55609 55614 55619 uAuBu
  1.8 −3.3 −1.1 −7.2 −5.0 −10.7 −13.8 0.35.25.2
Date 0h UTC Feb 27 Mar 4 Mar 9 Mar 14 Mar 19 Mar 24 Mar 29 Uncertainty/ns
MJD 55619 55624 55629 55634 55639 55644 55649 uAuBu
  −13.8 −20.6 −18.7 −19.0 −17.7 −27.7 −24.6 0.35.25.2
Date 0h UTC Mar 29 Apr 3 Apr 8 Apr 13 Apr 18 Apr 23 Apr 28 Uncertainty/ns
MJD 55649 55654 55659 55664 55669 55674 55679 uAuBu
  −24.6 −20.6 −24.4 −20.8 −12.3 −11.1 −3.7 0.35.25.2
Date 0h UTC Apr 28 May 3 May 8 May 13 May 18 May 23 May 28 Uncertainty/ns
MJD 55679 55684 55689 55694 55699 55704 55709 uAuBu
  −3.7 2.2 3.5 0.1 5.5 10.7 15.1 0.35.25.2
Date 0h UTC May 28 Jun 2 Jun 7 Jun 12 Jun 17 Jun 22 Jun 27 Uncertainty/ns
MJD 55709 55714 55719 55724 55729 55734 55739 uAuBu
  15.1 22.3 26.7 26.8 34.5 41.1 34.4 0.45.15.1
Date 0h UTC Jun 27 Jul 2 Jul 7 Jul 12 Jul 17 Jul 22 Jul 27 Uncertainty/ns
MJD 55739 55744 55749 55754 55759 55764 55769 uAuBu
  34.4 31.8 28.1 24.3 18.9 18.8 21.0 0.45.15.1
Date 0h UTC Aug 1 Aug 6 Aug 11 Aug 16 Aug 21 Aug 26 Aug 31 Uncertainty/ns
MJD 55774 55779 55784 55789 55794 55799 55804 uAuBu
  22.0 17.7 14.1 8.5 8.3 7.7 −0.9 0.45.15.1
Date 0h UTC Aug 31 Sep 5 Sep 10 Sep 15 Sep 20 Sep 25 Sep 30 Uncertainty/ns
MJD 55804 55809 55814 55819 55824 55829 55834 uAuBu
  −0.9 −9.7 −8.5 −2.1 0.6 5.8 0.9 0.45.15.1
Date 0h UTC Sep 30 Oct 5 Oct 10 Oct 15 Oct 20 Oct 25 Oct 30 Uncertainty/ns
MJD 55834 55839 55844 55849 55854 55859 55864 uAuBu
  0.9 −0.6 0.7 0.9 2.9 −4.1 −4.2 0.35.15.1
Date 0h UTC Oct 30 Nov 4 Nov 9 Nov 14 Nov 19 Nov 24 Nov 29 Uncertainty/ns
MJD 55864 55869 55874 55879 55884 55889 55894 uAuBu
  −4.2 −5.8 −5.6 −6.0 −6.9 −9.4 −7.5 0.35.15.1
Date 0h UTC Nov 29 Dec 4 Dec 9 Dec 14 Dec 19 Dec 24 Dec 29 Uncertainty/ns
MJD 55894 55899 55904 55909 55914 55919 55924 uAuBu
  −7.5 −9.9 −11.2 −11.1 −12.0 −15.0 −20.2 0.35.15.1

Monthly Clock Rates

Monthly rates of TAI−clock for intervals of one month ending at the given dates (unit is ns/day, "–" denotes that the clock was not used).

Date MJD Clocks
S/N 154 S/N 163 S/N 1227 S/N 2476
28 Jan 2011 55589 8.90 17.03 14.19 6.20
27 Feb 2011 55619 8.57 17.24 13.76 6.47
29 Mar 2011 55649 8.54 17.53 13.50 6.24
28 Apr 2011 55679 10.89 18.13 14.06 6.10
28 May 2011 55709 11.73 18.23 14.15 5.40
27 Jun 2011 55739 9.66 19.62 14.63 6.58
27 Jul 2011 55769 9.80 19.88 14.23 6.07
31 Aug 2011 55804 9.17 20.38 14.15 5.93
30 Sep 2011 55834 8.94 21.03 14.41 6.67
30 Oct 2011 55864 11.28 21.72 14.06 5.88
29 Nov 2011 55894 10.43 – 14.11 6.85
29 Dec 2011 55924 10.46 – 13.80 7.17

Relative Clock Weights

Relative weights (in percent) of the clocks for intervals of one month ending at the given dates.

Date MJD Clocks
S/N 154 S/N 163 S/N 1227 S/N 2476
28 Jan 2011 55589 0.081 0.010 0.744 0.536
27 Feb 2011 55619 0.067 0.012 0.729 0.571
29 Mar 2011 55649 0.074 0.014 0.744 0.744
28 Apr 2011 55679 0.077 0.018 0.755 0.755
28 May 2011 55709 0.075 0.022 0.751 0.751
27 Jun 2011 55739 0.079 0.023 0.737 0.737
27 Jul 2011 55769 0.085 0.027 0.729 0.729
31 Aug 2011 55804 0.089 0.029 0.716 0.716
30 Sep 2011 55834 0.077 0.033 0.720 0.720
30 Oct 2011 55864 0.070 0.032 0.668 0.657
29 Nov 2011 55894 0.101 – 0.683 0.639
29 Dec 2011 55924 0.131 – 0.702 0.684