Published BIPM data for 2012

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

From 2009 January 1, 0h UTC, TAI−UTC = 34 s. From 2012 July 1, 0h UTC, TAI−UTC = 35 s.

UTC−UTC(TP), ns

Date 0h UTC

MJD

 

Dec 29

55924

−20.2

Jan 3

55929

−19.9

Jan 8

55934

−16.3

Jan 13

55939

−19.4

Jan 18

55944

−22.3

Jan 23

55949

−29.5

Jan 28

55954

−23.4

Uncertainty/ns

uA      uB      u

0.3     5.1     5.1

Date 0h UTC

MJD

 

Jan 28

55954

−23.4

Feb 2

55959

−29.3

Feb 7

55964

−29.0

Feb 12

55969

−25.8

Feb 17

55974

−24.7

Feb 22

55979

−21.5

Feb 27

55984

−15.6

Uncertainty/ns

uA      uB      u

0.3     5.1     5.1

Date 0h UTC

MJD

 

Feb 27

55984

−15.6

Mar 3

55989

−12.1

Mar 8

55994

−7.2

Mar 13

55999

−4.4

Mar 18

56004

−1.7

Mar 23

56009

−3.1

Mar 28

56014

1.5

Uncertainty/ns

uA      uB      u

0.3     5.3     5.1

Date 0h UTC

MJD

 

Mar 28

56014

1.5

Apr 2

56019

8.3

Apr 7

56024

12.9

Apr 12

56029

8.7

Apr 17

56034

10.2

Apr 22

56039

9.9

Apr 27

56044

9.6

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Apr 27

56044

9.6

May 2

56049

17.7

May 7

56054

21.6

May 12

56059

25.4

May 17

56064

29.2

May 22

56069

30.9

May 27

56074

34.7

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

May 27

56074

34.7

Jun 1

56079

34.5

Jun 6

56084

45.2

Jun 11

56089

39.0

Jun 16

56094

42.0

Jun 21

56099

42.5

Jun 26

56104

41.6

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Jul 1

56109

30.3

Jul 6

56114

32.3

Jul 11

56119

33.9

Jul 16

56124

35.7

Jul 21

56129

34.5

Jul 26

56134

29.9

Jul 31

56139

27.3

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Jul 31

56139

27.3

Aug 5

56144

21.0

Aug 10

56149

17.1

Aug 15

56154

11.1

Aug 20

56159

−2.2

Aug 25

56164

−0.7

Aug 30

56169

−2.0

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Aug 30

56169

−2.0

Sep 4

56174

−4.5

Sep 9

56179

−4.8

Sep 14

56184

−8.2

Sep 19

56189

−15.9

Sep 24

56194

−19.8

Sep 29

56199

−22.7

Uncertainty/ns

uA      uB      u

0.3     5.1     5.1

Date 0h UTC

MJD

 

Sep 29

56199

−22.7

Oct 4

56204

−22.7

Oct 9

56209

−23.7

Oct 14

56214

−20.5

Oct 19

56219

−19.7

Oct 24

56224

−22.4

Oct 29

56229

−26.8

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Oct 29

56229

−26.8

Nov 3

56234

−27.3

Nov 8

56239

−21.5

Nov 13

56244

−20.7

Nov 18

56249

−17.2

Nov 23

56254

−13.8

Nov 28

56259

−13.4

Uncertainty/ns

uA      uB      u

0.3     5.2     5.2

Date 0h UTC

MJD

 

Nov 28

56259

−13.4

Dec 3

56264

−14.9

Dec 8

56269

−19.8

Dec 13

56274

−21.9

Dec 18

56279

−25.9

Dec 23

56284

−26.6

Dec 28

56289

−28.8

Uncertainty/ns

uA      uB      u

0.3     5.1     5.1

 

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 2012

55954  8.91 -
14.05 6.64
27 Feb 2012 55984 10.29 -
13.94 6.50
28 Mar 2012 56014 10.58 -
14.25 6.57
27 Apr 2012 56044  9.80 2.62 13.95 6.73
27 May 2012 56074 10.43 2.87 14.73 6.73
26 Jun 2012 56104  8.86 3.01 14.83 6.66
31 Jul 2012 56139  9.45 3.30 14.90 7.00
30 Aug 2012 56169  9.96 2.64 14.17 6.38
29 Sep 2012 56199 10.07 4.21 14.08 6.66
29 Oct 2012 56229  9.59 3.51 14.16 6.74
28 Nov 2012 56259  8.86 3.28 14.67 6.86
28 Dec 2012 56289 10.81 2.21 13.72 6.07

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 2012

55954 0.117

-

0.706 0.683
27 Feb 2012 55984 0.122 - 0.704 0.704
28 Mar 2012 56014 0.138 - 0.687 0.687
27 Apr 2012 56044 0.147 - 0.685 0.685
27 May 2012 56074 0.247 - 0.670 0.670
26 Jun 2012 56104 0.186 - 0.670 0.670
31 Jul 2012 56139 0.178 - 0.694 0.694
30 Aug 2012 56169 0.187 0.696 0.696 0.696
29 Sep 2012 56199 0.200 0.210 0.687 0.687
29 Oct 2012 56229 0.297 0.293 0.687 0.687
28 Nov 2012 56259 0.264 0.397 0.685 0.685
28 Dec 2012 56289 0.281 0.318 0.696 0.696

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