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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
2010-12-29
55559
6.7
2010-12-19
55549
5.5
2010-12-09
55539
3.9
2010-11-29
55529
0.9
2010-11-19
55519
1.1
2010-11-09
55509
-0.6
2010-10-30
55499
-1.6
2010-10-20
55489
-3.7
2010-10-10
55479
-4.6
2010-09-30
55469
-3.3
2010-09-10
55449
-0.1
2010-08-31
55439
-2.2
2010-08-21
55429
-3.6
2010-08-11
55419
-5.1
2010-08-01
55409
-7.4
2010-07-22
55399
-9.4
2010-07-12
55389
-9.5
2010-07-02
55379
-10.6
2010-06-22
55369
-11.8
2010-06-12
55359
-10.7
2010-06-02
55349
-9.3
2010-05-23
55339
-8.1
2010-05-13
55329
-6.8
2010-05-03
55319
-5.6
2010-04-23
55309
-4.6
2010-04-13
55299
-3.9
2010-04-03
55289
-4.0
2010-03-24
55279
-3.4
2010-03-14
55269
-2.5
2010-03-04
55259
-1.8
2010-02-22
55249
-2.2
2010-02-12
55239
-0.4
2010-02-02
55229
3.7
2010-01-23
55219
5.7
2010-01-13
55209
10.1
2010-01-03
55199
15.0