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NIST USNO 2007 Archive
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 nanoseconds) |
|---|---|---|
| 2007-12-27 | 54461 | 4 ns |
| 2007-12-20 | 54454 | 5 ns |
| 2007-12-13 | 54447 | 5 ns |
| 2007-12-06 | 54440 | 6 ns |
| 2007-11-29 | 54433 | 7 ns |
| 2007-11-22 | 54426 | 8 ns |
| 2007-11-15 | 54419 | 7 ns |
| 2007-11-08 | 54412 | 7 ns |
| 2007-11-01 | 54405 | 7 ns |
| 2007-10-25 | 54398 | 8 ns |
| 2007-10-18 | 54391 | 7 ns |
| 2007-10-11 | 54384 | 6 ns |
| 2007-10-04 | 54377 | 4 ns |
| 2007-09-27 | 54370 | 2 ns |
| 2007-09-20 | 54363 | 0 ns |
| 2007-09-13 | 54356 | -1 ns |
| 2007-09-06 | 54349 | -3 ns |
| 2007-08-30 | 54342 | -4 ns |
| 2007-08-23 | 54335 | -4 ns |
| 2007-08-16 | 54328 | -4 ns |
| 2007-08-09 | 54321 | -2 ns |
| 2007-08-02 | 54314 | -4 ns |
| 2007-07-26 | 54307 | -3 ns |
| 2007-07-19 | 54300 | -3 ns |
| 2007-07-12 | 54293 | -2 ns |
| 2007-07-05 | 54286 | -1 ns |
| 2007-06-28 | 54279 | 1 ns |
| 2007-06-21 | 54272 | 3 ns |
| 2007-06-14 | 54265 | 4 ns |
| 2007-06-07 | 54258 | 4 ns |
| 2007-05-31 | 54251 | 6 ns |
| 2007-05-24 | 54244 | 9 ns |
| 2007-05-17 | 54237 | 11 ns |
| 2007-05-10 | 54230 | 12 ns |
| 2007-05-03 | 54223 | 15 ns |
| 2007-04-26 | 54216 | 15 ns |
| 2007-04-19 | 54209 | 16 ns |
| 2007-04-12 | 54202 | 15 ns |
| 2007-04-05 | 54195 | 16 ns |
| 2007-03-29 | 54188 | 19 ns |
| 2007-03-22 | 54181 | 20 ns |
| 2007-03-15 | 54174 | 21 ns |
| 2007-03-08 | 54167 | 21 ns |
| 2007-03-01 | 54160 | 21 ns |
| 2007-02-22 | 54153 | 23 ns |
| 2007-02-15 | 54146 | 23 ns |
| 2007-02-08 | 54139 | 23 ns |
| 2007-02-01 | 54132 | 25 ns |
| 2007-01-25 | 54125 | 26 ns |
| 2007-01-18 | 54118 | 28 ns |
| 2007-01-11 | 54111 | 28 ns |
| 2007-01-04 | 54104 | 26 ns |