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
|
