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) (+/- 5 ns) |
---|---|---|
2023-05-30 | 60094 | -2.1 ns |
2023-05-25 | 60089 | -2.7 ns |
2023-05-20 | 60084 | -2.4 ns |
2023-05-15 | 60079 | -2.3 ns |
2023-05-10 | 60074 | -1.9 ns |
2023-05-05 | 60069 | -0.2 ns |
2023-04-30 | 60064 | +0.4 ns |
2023-04-25 | 60059 | +1.1 ns |
2023-04-20 | 60054 | +1.4 ns |
2023-04-15 | 60049 | +2.8 ns |
2023-04-10 | 60044 | +3.1 ns |
2023-04-05 | 60039 | +2.6 ns |
2023-03-31 | 60034 | +1.9 ns |
2023-03-26 | 60029 | +0.9 ns |
2023-03-21 |
60024 |
+0.3 ns |
2023-03-16 | 60019 | -0.2 ns |
2023-03-11 | 60014 | -1.2 ns |
2023-03-06 | 60009 | -1.2 ns |
2023-03-01 | 60004 | -2.0 ns |
2023-02-24 | 59999 | -2.2 ns |
2023-02-19 | 59994 | -1.7 ns |
2023-02-14 | 59989 | -1.6 ns |
2023-02-09 | 59984 | +0.1 ns |
2023-02-04 | 59979 | +1.0 ns |
2023-01-30 | 59974 | +1.5 ns |
2023-01-25 | 59969 | +1.9 ns |
2023-01-20 | 59964 | +1.2 ns |
2023-01-15 | 59959 | +0.6 ns |
2023-01-10 | 59954 | +0.3 ns |
2023-01-05 | 59949 | +0.3 ns |