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 tableit appears that TAI-UTC difference reached 10sonly 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, 1970is MJD 40587, and the TAI-UTC difference is about 8s.I'm not very familiar in this field so it's likely thatI'm missing something. Are there a reference I can look upfor the "ten seconds" explanation in R7RS?
_______________________________________________
Scheme-reports mailing list
Scheme-reports@x
http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports
_______________________________________________ Scheme-reports mailing list Scheme-reports@x http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports