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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
2009-12-24
55189
16.0
2009-12-14
55179
17.9
2009-12-04
55169
18.1
2009-11-24
55159
15.6
2009-11-14
55149
14.1
2009-11-04
55139
7.8
2009-10-25
55129
3.9
2009-10-15
55119
0.6
2009-10-05
55109
-5.2
2009-09-25
55099
-10.2
2009-09-15
55089
-13.8
2009-09-05
55089
-15.1
2009-08-26
55069
-15.8
2009-08-16
55059
-16.4
2009-08-06
55049
-14.7
2009-07-27
55039
-12.3
2009-07-17
55029
-9.6
2009-07-07
55019
-4.9
2009-06-27
55009
0
2009-06-17
54999
4.7
2009-06-07
55989
5.7
2009-05-28
54979
10.3
2009-05-18
54969
11.2
2009-05-08
54959
10.8
2009-04-28
54949
9.7
2009-04-18
54939
7.0
2009-04-08
54929
10.0
2009-03-29
54919
7.5
2009-03-18
54909
7.1
2009-03-09
54899
4.9
2009-02-27
54889
4.3
2009-02-17
54879
2.0
2009-02-07
54869
1.7
2009-01-28
54859
3.9
2009-01-18
54849
3.9
2009-01-08
54839
4.0