RELATIONSHIP BETWEEN TAI AND UTC


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Limits of validity (at 0h UTC) TAI-UTC (MJD = Modified Julian Day)

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1961  Jan.  1 - 1961  Aug.  1     1.422 818 0s + (MJD - 37 300) x 0.001 296s
      Aug.  1 - 1962  Jan.  1     1.372 818 0s +        ""
1962  Jan.  1 - 1963  Nov.  1     1.845 858 0s + (MJD - 37 665) x 0.001 123 2s
1963  Nov.  1 - 1964  Jan.  1     1.945 858 0s +        ""
1964  Jan.  1 -       April 1     3.240 130 0s + (MJD - 38 761) x 0.001 296s
      April 1 -       Sept. 1     3.340 130 0s +        ""
      Sept. 1 - 1965  Jan.  1     3.440 130 0s +        ""
1965  Jan.  1 -       March 1     3.540 130 0s +        ""
      March 1 -       Jul.  1     3.640 130 0s +        ""
      Jul.  1 -       Sept. 1     3.740 130 0s +        ""
      Sept. 1 - 1966  Jan.  1     3.840 130 0s +        ""
1966  Jan.  1 - 1968  Feb.  1     4.313 170 0s + (MJD - 39 126) x 0.002 592s
1968  Feb.  1 - 1972  Jan.  1     4.213 170 0s +        ""
1972  Jan.  1 -       Jul.  1    10s            
      Jul.  1 - 1973  Jan.  1    11s    
1973  Jan.  1 - 1974  Jan.  1    12s    
1974  Jan.  1 - 1975  Jan.  1    13s    
1975  Jan.  1 - 1976  Jan.  1    14s   
1976  Jan.  1 - 1977  Jan.  1    15s   
1977  Jan.  1 - 1978  Jan.  1    16s   
1978  Jan.  1 - 1979  Jan.  1    17s
1979  Jan.  1 - 1980  Jan.  1    18s
1980  Jan.  1 - 1981  Jul.  1    19s   
1981  Jul.  1 - 1982  Jul.  1    20s   
1982  Jul.  1 - 1983  Jul.  1    21s    
1983  Jul.  1 - 1985  Jul.  1    22s    
1985  Jul.  1 - 1988  Jan.  1    23s
1988  Jan.  1 - 1990  Jan.  1    24s 
1990  Jan.  1 - 1991  Jan.  1    25s
1991  Jan.  1 - 1992  Jul.  1    26s
1992  Jul.  1 - 1993  Jul   1    27s
1993  Jul.  1 - 1994  Jul.  1    28s
1994  Jul.  1 - 1996  Jan.  1    29s
1996  Jan.  1 - 1997  Jul.  1    30s
1997  Jul.  1 - 1999  Jan   1    31s
1999  Jan.  1 - 2006  Jan   1    32s
2006  Jan.  1 - 2009  Jan   1    33s
2009  Jan.  1 - 2012  Jul   1    34s
2012  Jul.  1 -                  35s