|
NIST Time Scale Data Archive
Updated
monthly |
|
UTC(USNO) - UTC(NIST)
The United States Naval Observatory (USNO) and the National Institute of Standards and
Technology (NIST) make regular comparisons of their respective time scales. These
comparisons are made using GPS common-view measurements from up to approximately 10 GPS satellites. The
table below lists recent differences between the two time scales.
Weekly
UTC(USNO, Master Clock) - UTC(NIST)Values
Date |
MJD |
UTC(USNO)-UTC(NIST)
(+/- 20 ns) |
2008-08-28 |
54706 |
-2 ns |
2008-08-21 |
54699 |
3 ns |
2008-08-14 |
54692 |
5 ns |
2008-08-07 |
54685 |
5 ns |
2008-07-31 |
54678 |
6 ns |
2008-07-24 |
54671 |
3 ns |
2008-07-17 |
54664 |
2 ns |
2008-07-10 |
54657 |
2 ns |
2008-07-03 |
54650 |
0 ns |
2008-06-26 |
54643 |
-3 ns |
2008-06-19 |
54636 |
-7 ns |
2008-06-12 |
54629 |
-7 ns |
2008-06-05 |
54622 |
-8 ns |
2008-05-29 |
54615 |
-10 ns |
2008-05-22 |
54608 |
-12 ns |
2008-05-15 |
54601 |
-14 ns |
2008-05-08 |
54594 |
-14 ns |
2008-05-01 |
54587 |
-13 ns |
2008-04-24 |
54580 |
-13 ns |
2008-04-17 |
54573 |
-15 ns |
2008-04-10 |
54566 |
-14 ns |
2008-04-03 |
54559 |
-13 ns |
2008-03-27 |
54552 |
-14 ns |
2008-03-20 |
54545 |
-12 ns |
2008-03-13 |
54538 |
-11 ns |
2008-03-06 |
54531 |
-9 ns |
2008-02-28 |
54524 |
-8 ns |
2008-02-21 |
54517 |
-5 ns |
2008-02-14 |
54510 |
-3 ns |
2008-02-07 |
54503 |
-2 ns |
2008-01-31 |
54496 |
-1 ns |
2008-01-24 |
54489 |
0 ns |
2008-01-17 |
54482 |
1 ns |
2008-01-10 |
54475 |
2 ns |
2008-01-03 |
54468 |
2 ns |
Online: September 2002 - Last update: September 4, 2008 - ep