NIST Time Scale Data Archive
Updated monthly
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UTC - UTC (NIST)
The deviation of UTC(NIST) from UTC has been less than +/-100 ns since July 6, 1994. The table below shows values of UTC - UTC(NIST) as supplied by the BIPM Circular T for the most recent period in which data are available.
UTC - UTC(NIST)Values (at 10-day intervals)
|
Date
|
MJD
|
UTC-UTC(NIST)
ns
|
|
2012-12-28
|
56289
|
-9.5
|
|
2012-12-18
|
56279
|
-6.6
|
|
2012-12-08
|
56269
|
-4.7
|
|
2012-11-28
|
56259
|
-3.1
|
|
2012-11-18
|
56249
|
-1.3
|
|
2012-11-08
|
56239
|
-1.4
|
|
2012-10-29
|
56229
|
0.5
|
|
2012-10-19
|
56219
|
2.5
|
|
2012-10-09
|
56209
|
2.8
|
|
2012-09-29
|
56199
|
2.9
|
|
2012-09-19
|
5618  9 |
3.9
|
|
2012-09-09
|
56179
|
3.3
|
|
2012-08-30
|
56169
|
2.8
|
|
2012-08-20
|
56159
|
2.7
|
|
2012-08-10
|
56149
|
2.8
|
|
2012-07-31
|
56139
|
2.3
|
|
2012-07-21
|
56129
|
2.9
|
|
2012-07-11
|
56119
|
3.5
|
|
2012-07-01
|
56109
|
4.8
|
|
2012-06-21
|
56099
|
5.5
|
|
2012-06-11
|
56089
|
7.8
|
|
2012-06-01
|
56079
|
9.3
|
|
2012-05-22
|
56069
|
10.2
|
|
2012-05-12
|
56059
|
9.1
|
|
2012-05-02
|
56049
|
7.0
|
|
2012-04-22
|
56039
|
4.1
|
|
2012-04-12
|
56029
|
0.9
|
|
2012-04-02
|
56019
|
-0.6
|
|
2012-03-23
|
56009
|
-1.9
|
|
2012-03-13
|
55999
|
-2.3
|
|
2012-03-03
|
55989
|
-3.4
|
|
2012-02-22
|
55979
|
-4.7
|
|
2012-02-12
|
55969
|
-2.7
|
|
2012-02-02
|
55959
|
-0.8
|
|
2012-01-23
|
55949
|
1.4
|
|
2012-01-13
|
55939
|
2.7
|
|
2012-01-03
|
55929
|
4.5
|
