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UNIX$@$G$b(Jleapsec$@$r=hM}$7$F$$$k(J($@=hM}$G$-$k(J)$@$i$7$$$H$$$&$3$H$O(J
$@0J30$KCN$i$l$F$$$J$$!#$H$3$m$,!"@_Dj$;$:$K;H$C$F$$$k$N$+!"(J
$@<BAu$KITNI$,$"$k$N$+!"$I$&$d$i5!G=$7$F$$$J$$$h$&$G$"$k(J.
$@$H$$$&$N$,%]%$%s%H$G$9$,!"0J2<?M$+$i$N<u$1Gd$j$J$,$i(J
$@B?>/$N2r@b$r$H(J:

--------------------------------------------------------------
|
|UT1: Universal Time 1           $@@$3&;~(J ($@CO5e$N<+E>1?F0$N4QB,$+$i7hDj(J)
|TAI: International Atomic Time  $@9q:]86;R;~(J ($@4p=`86;R;~7W$N4QB,$+$i7hDj(J)
|UTC: Cordinated Universal Time  $@6(Dj@$3&;~(J (TAI$@$H(JUT1$@$r;H$C$F7h$a$k(J)
|
|$@!VNr;KE*(J/$@@83hE*(J/$@?4>pE*$K$O(J UT1 $@$r;H$$$?$$!%(J
|$@$7$+$74QB,$+$i$bL@$i$+$@$,CO5e$N<+E>$OIT5,B'$KMI$i$$$G$$$k$N$G(J 
|$@$=$l$r:,K\$N4p=`$H$O$G$-$:(J UTC $@$r;H$C$F$$$k!W$N$,8=>u!%(J
|
|UTC $@$O(J TAI $@$H(J UT1 $@$r0J2<$N$h$&$KAH$_9g$o$;$F7hDj$9$k!'(J
|
|    * UTC $@$N(J 1$@IC$ND9$5$O(J TAI $@$N(J 1$@IC$ND9$5$HF1$8$G9q:]86;RIC$H$$$&(J.
|
|    * 1 $@9q:]86;RIC(J $@$O(J $@J?6Q3$?eLL(J($@87L)$K$O%8%*%$%I(J)$@>e$G7W$C$?(JSI $@C10L7O(J
|      $@$K$*$1$k(J 1$@IC$HF1$8$G(J, $@%;%7%&%`(J133$@$N$"$kFCDj$NJ|<M<~4|$N(J
|       9192631770$@G\$H$9$k(J.
|
|    *  UTC $@$N;~9o$O(J UT1 $@$+$i$"$^$jN%$l$J$$$h$&$KD4@0$5$l$F$$$k!%(J
|       1958$@G/=iF,$K$O(J TAI $@$H(J UT1 $@$O0lCW$7$F$$$?$,CO5e$N<+E>;~4V$N(J
|       $@Dc2<$K$h$j(J UT1 $@$O(J TAI $@$HHf$Y$FCY$l5$L#$J$N$G(J UT1 $@$H(J UTC $@$N(J
|       $@:9$,(J 0.9$@IC$r1[$($J$$$h$&$K1<IC$rA^F~$9$k(J.
|
|TIME>  ntp $@$O$d$a$F!"(JDJB$@$,:n$C$?(Jclockspeed$@$H$$$&$N$K@Z$jBX$($^$7$?!#(J
|TIME>  $@$3$C$A$O(JUNIX$@%7%9%F%`$N%/%m%C%/$r(JTAI$@$K9g$o$;$^$9!#(J
|TIME>  $@$*$+$2$G$$$m$$$m@"9g$o$;$,BgJQ$G$9$,!"$J$s$H$+!#(J
|
|TAI $@$K$"$o$;$k$H(J UT1 $@$d(J UTC $@$H$O$@$s$@$s$:$l$F$f$/$o$1$G$9$M!%(J
|
|TIME> >  $@5?Ld$O(J2)$@$N%+%&%s%H$,$b$7@53N$@$H$9$k$H!"(J1970$@G/0JMh$N1<IC(J32$@IC$O(J
|TIME> >  $@$I$3$K9T$C$?$N$+!"$I$3$G$I$&D4@0$7$F$$$k$N$+$H$$$&$3$H$G$9!#(J
|TIME> 
|TIME>   UNIX$@$N%+%&%s%H$O5/E@$,(JTAI$@$G(J10$@IC$:$l$F$$$F!"(J
|TIME>   $@$=$l0J9_$N(J22$@IC$OB8:_$7$J$+$C$?G!$/!"F0$$$F$$$k!#(J
|TIME>   $@$D$^$j!"1<IC$O4XCN$7$J$$$H$$$&$3$H$N$h$&$G$9!#(J
|
|$@$=$&$$$&$3$H$K$J$j$^$9!%(J
|
|TIME>   $@$9$k$H!"1<IC$N$H$-$K$I$&$9$k$+$,LdBj$K$J$j$^$9!#(J
|
|NTp $@$G$O!$FMA3(J 1$@ICA^F~$9$k$N$G$9!%(JTAI $@$KF14|$9$k;~7W$r;}$C$F$$$k(J
|$@?M$+$i8+$k$H!$1<ICA^F~$KH<$$FMA3#1IC$:$l$^$9!%(J
|
|NTT $@$N(J 104 $@$G$O!$1<ICA0$N(J1$@;~4V$O(J1$@IC$r(J 1/3600$@IC$@$1?-$P$9$H(J
|$@$-$$$F$$$^$9!%(J ($@MW3NG'(J)
|
|TIME>   $@$^$?!"$"$k;~9o$HJL$N;~9o$H$N4V$K2?ICB8:_$7$?$+$H$$$&(J
|TIME>   $@7W;;$O$*$+$7$/$J$j$^$9!#(J
|
|UTC $@$G0z$-;;$9$k$H$=$&$$$&$3$H$K$J$j$^$9!%(J
|
|TIME>   $@$H$s$G$b$J$$%7%9%F%`$@$H$$$&$3$H$K$J$j$^$9$,!"K\Ev$G$7$g$&$+!#(J
|
|$@2a5n$K4X$7$F$O1<ICA^F~$N;~4|$OH=$C$F$$$^$9$+$i!$(JUTC $@$+$i(J TAI $@$K(J
|$@JQ49$9$k$3$H$O2DG=$G$9!%(JTAI $@$G0z$-;;$9$l$PLdBj$J$$$H;W$$$^$9!%(J
|
|$@L$Mh$O$o$+$j$^$;$s!%$$$D1<IC$rA^F~$9$k$+$O?M4V$,6(Dj$G(J(*)$@7h$a$k$3$H(J
|$@$G$9$+$i!%(J
|
|(*) IERS(International Earth Rotation Service, $@9q:]CO5e2sE>(J
|    $@4QB,;v6H(J) $@$,7hDj$7$F$$$k!%(J
|
|
|$@>\$7$$;v>p$O(J DJB$@$N%Z!<%8(J
|  <ftp://koobera.math.uic.edu/www/proto/utctai.html>
|$@$r;2>H$N$3$H(J
|
|------

$@$b$7$b(J, UNIX $@$NFbB";~7W(J(machine time)$@$,(J1970$@G/$N$"$k;~E@$+$i$N(J
$@0lIC$r@Q;;$7$?$b$N$H$9$l$P!"1<IC$J$I$H$OL54X78$G!"(JTAI$@$H(J
$@F1$89o$_$G;~4V$,?J$s$G$$$/$O$:$G$"$k$+$i!"FbB";~7W$r$"$o$;$k(J
$@0Y$N4p=`$H$J$k(J($@9q:](J)$@;~7W$O(J TAI $@$G$J$1$l$P$*$+$7$$(J.
$@$7$+$7!"(JTAI$@$O@83h$G;H$&;~7W$H$O1<IC$NB8:_$K$h$j$:$l$k(J.
$@$3$l$O%+%l%s%@!<$G1<F|$,1<G/$KA^F~$5$l$k$N$HF1MM$G$"$k$+$i!"(J
$@ICC10L$NFbB";~7W$N;~9o$r?M4V8~$1$K(Jhhmmss$@$GI=<($9$k$H$-$K(J
$@49;;$9$k$N$HF1$8M}6~$G$"$k(J.
FreeBSD$@$K$b(Jleapsecond$@$rEPO?$9$k5!G=$,$"$k$h$&$J$N$@$,!"(J
$@BP1~$9$k1<IC$NA^F~;~9o$N%G!<%?$O!"$9$3$7D4$Y$?8B$j$G$O(J
$@G[IU$5$l$F$$$k(JOS$@$N>u67$@$H(J,$@$I$&$d$i2?$bF~$C$F$$$J$$$i$7$$(J.
