Hi Shiro,
On Sun, Mar 2, 2014 at 6:15 PM, Shiro Kawai <[email protected]> wrote: > In section 6.14, the description of current-second reads: > > The value 0.0 represents midnight on January 1, 1970 TAI > (equivalent to ten seconds before midnight Universal Time) > > However, according to the TAI-UTC table > ( ftp://maia.usno.navy.mil/ser7/tai-utc.dat ), > it appears that TAI-UTC difference reached 10s > only after 1972. Here's the excerpt of the table: > > 1966 JAN 1 =JD 2439126.5 TAI-UTC= 4.3131700 S + (MJD - 39126.) X > 0.002592 S > 1968 FEB 1 =JD 2439887.5 TAI-UTC= 4.2131700 S + (MJD - 39126.) X > 0.002592 S > 1972 JAN 1 =JD 2441317.5 TAI-UTC= 10.0 S + (MJD - 41317.) X 0.0 > S > 1972 JUL 1 =JD 2441499.5 TAI-UTC= 11.0 S + (MJD - 41317.) X 0.0 > S > 1973 JAN 1 =JD 2441683.5 TAI-UTC= 12.0 S + (MJD - 41317.) X 0.0 > S > > Before 1972 the formula is a bit involved, but January 1, 1970 > > is MJD 40587, and the TAI-UTC difference is about 8s. > > > I'm not very familiar in this field so it's likely that > > I'm missing something. Are there a reference I can look up > > for the "ten seconds" explanation in R7RS? > > > > _______________________________________________ > Scheme-reports mailing list > [email protected] > http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports > >
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