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.
Date | MJD | UTC(USNO) - UTC(NIST) (+/- 20 nanoseconds) |
---|---|---|
2016-12-29 | 57751 | -4.3 ns |
2016-12-22 | 57744 | -5.6 ns |
2016-12-15 | 57737 | -7.0 ns |
2016-12-08 | 57730 | -6.2 ns |
2016-12-01 | 57723 | -3.1 ns |
2016-11-24 | 57716 | -1.6 ns |
2016-11-17 | 57709 | -2.7 ns |
2016-11-10 | 57702 | -1.9 ns |
2016-11-03 | 57695 | -2.0 ns |
2016-10-27 | 57688 | 0.2 ns |
2016-10-20 | 57681 | 2.2 ns |
2016-10-13 | 57674 | 3.8 ns |
2016-10-06 | 57667 | 2.5 ns |
2016-09-29 | 57660 | 2.7 ns |
2016-09-22 | 57653 | 0.8 ns |
2016-09-15 | 57646 | 1 ns |
2016-09-08 | 57639 | 0.8 ns |
2016-09-01 | 57632 | -1.8 ns |
2016-08-25 | 57625 | -5.7 ns |
2016-08-18 | 57618 | -6 ns |
2016-08-11 | 57611 | -6 ns |
2016-08-04 | 57604 | -6.9 ns |
2016-07-28 | 57597 | -5.2 ns |
2016-07-21 | 57590 | -5.1 ns |
2016-07-14 | 57583 | -2.2 ns |
2016-07-07 | 57576 | -1.2 ns |
2016-06-30 | 57569 | -0.9 ns |
2016-06-23 | 57562 | 0.6 ns |
2016-06-16 | 57555 | 1.5 ns |
2016-06-09 | 57548 | 0 ns |
2016-06-02 | 57541 | 0.5 ns |
2016-05-26 | 57534 | -0.2 ns |
2016-05-19 | 57527 | -2 ns |
2016-05-12 | 57520 | -2.5 ns |
2016-05-05 | 57513 | -2.6 ns |
2016-04-28 | 57506 | -3.9 ns |
2016-04-21 | 57499 | -3.9 ns |
2016-04-14 | 57492 | -1.1 ns |
2016-04-07 | 57485 | 0.7 ns |
2016-03-31 |
57478 |
2 ns |
2016-03-24 |
57471 |
-1 ns |
2016-03-17 |
57464 |
-2 ns |
2016-03-10 |
57457 |
-4 ns |
2016-03-03 |
57450 |
-4 ns |
2016-02-25 | 57443 | -7 ns |
2016-02-18 | 57436 | -8 ns |
2016-02-11 | 57429 | -9 ns |
2016-02-04 | 57422 | -9 ns |
2016-01-28 | 57415 | -7 ns |
2016-01-21 | 57408 | -9 ns |
2016-01-14 | 57401 | -6 ns |
2016-01-07 | 57394 | -4 ns |