4 # This code is free software; you can redistribute it and/or modify it
5 # under the terms of the GNU General Public License version 2 only, as
6 # published by the Free Software Foundation. Sun designates this
7 # particular file as subject to the "Classpath" exception as provided
8 # by Sun in the LICENSE file that accompanied this code.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 # CA 95054 USA or visit www.sun.com if you need additional information or
22 # have any questions.
23 #
24 # @(#)leapseconds 8.6
25
26 # Allowance for leapseconds added to each timezone file.
27
28 # The International Earth Rotation Service periodically uses leap seconds
29 # to keep UTC to within 0.9 s of UT1
30 # (which measures the true angular orientation of the earth in space); see
31 # Terry J Quinn, The BIPM and the accurate measure of time,
32 # Proc IEEE 79, 7 (July 1991), 894-905.
33 # There were no leap seconds before 1972, because the official mechanism
34 # accounting for the discrepancy between atomic time and the earth's rotation
35 # did not exist until the early 1970s.
36
37 # The correction (+ or -) is made at the given time, so lines
38 # will typically look like:
39 # Leap YEAR MON DAY 23:59:60 + R/S
40 # or
41 # Leap YEAR MON DAY 23:59:59 - R/S
42
43 # If the leapsecond is Rolling (R) the given time is local time
44 # If the leapsecond is Stationary (S) the given time is UTC
61 Leap 1989 Dec 31 23:59:60 + S
62 Leap 1990 Dec 31 23:59:60 + S
63 Leap 1992 Jun 30 23:59:60 + S
64 Leap 1993 Jun 30 23:59:60 + S
65 Leap 1994 Jun 30 23:59:60 + S
66 Leap 1995 Dec 31 23:59:60 + S
67 Leap 1997 Jun 30 23:59:60 + S
68 Leap 1998 Dec 31 23:59:60 + S
69 Leap 2005 Dec 31 23:59:60 + S
70 Leap 2008 Dec 31 23:59:60 + S
71
72 # INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
73 #
74 # SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
75 #
76 # SERVICE DE LA ROTATION TERRESTRE
77 # OBSERVATOIRE DE PARIS
78 # 61, Av. de l'Observatoire 75014 PARIS (France)
79 # Tel. : 33 (0) 1 40 51 22 26
80 # FAX : 33 (0) 1 40 51 22 91
81 # e-mail : services.iers@obspm.fr
82 # http://hpiers.obspm.fr/eop-pc
83 #
84 # Paris, 4 July 2008
85 #
86 # Bulletin C 36
87 #
88 # To authorities responsible
89 # for the measurement and
90 # distribution of time
91 #
92 # UTC TIME STEP
93 # on the 1st of January 2009
94 #
95 # A positive leap second will be introduced at the end of December 2008.
96 # The sequence of dates of the UTC second markers will be:
97 #
98 # 2008 December 31, 23h 59m 59s
99 # 2008 December 31, 23h 59m 60s
100 # 2009 January 1, 0h 0m 0s
101 #
102 # The difference between UTC and the International Atomic Time TAI is:
103 #
104 # from 2006 January 1, 0h UTC, to 2009 January 1 0h UTC : UTC-TAI = - 33s
105 # from 2009 January 1, 0h UTC, until further notice : UTC-TAI = - 34s
106 #
107 # Leap seconds can be introduced in UTC at the end of the months of December
108 # or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
109 # six months, either to announce a time step in UTC or to confirm that there
110 # will be no time step at the next possible date.
111 #
112 # Daniel GAMBIS
113 # Head
114 # Earth Orientation Center of IERS
115 # Observatoire de Paris, France
|
4 # This code is free software; you can redistribute it and/or modify it
5 # under the terms of the GNU General Public License version 2 only, as
6 # published by the Free Software Foundation. Sun designates this
7 # particular file as subject to the "Classpath" exception as provided
8 # by Sun in the LICENSE file that accompanied this code.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 # CA 95054 USA or visit www.sun.com if you need additional information or
22 # have any questions.
23 #
24 # <pre>
25 # This file is in the public domain, so clarified as of
26 # 2009-05-17 by Arthur David Olson.
27
28 # Allowance for leapseconds added to each timezone file.
29
30 # The International Earth Rotation Service periodically uses leap seconds
31 # to keep UTC to within 0.9 s of UT1
32 # (which measures the true angular orientation of the earth in space); see
33 # Terry J Quinn, The BIPM and the accurate measure of time,
34 # Proc IEEE 79, 7 (July 1991), 894-905.
35 # There were no leap seconds before 1972, because the official mechanism
36 # accounting for the discrepancy between atomic time and the earth's rotation
37 # did not exist until the early 1970s.
38
39 # The correction (+ or -) is made at the given time, so lines
40 # will typically look like:
41 # Leap YEAR MON DAY 23:59:60 + R/S
42 # or
43 # Leap YEAR MON DAY 23:59:59 - R/S
44
45 # If the leapsecond is Rolling (R) the given time is local time
46 # If the leapsecond is Stationary (S) the given time is UTC
63 Leap 1989 Dec 31 23:59:60 + S
64 Leap 1990 Dec 31 23:59:60 + S
65 Leap 1992 Jun 30 23:59:60 + S
66 Leap 1993 Jun 30 23:59:60 + S
67 Leap 1994 Jun 30 23:59:60 + S
68 Leap 1995 Dec 31 23:59:60 + S
69 Leap 1997 Jun 30 23:59:60 + S
70 Leap 1998 Dec 31 23:59:60 + S
71 Leap 2005 Dec 31 23:59:60 + S
72 Leap 2008 Dec 31 23:59:60 + S
73
74 # INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
75 #
76 # SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
77 #
78 # SERVICE DE LA ROTATION TERRESTRE
79 # OBSERVATOIRE DE PARIS
80 # 61, Av. de l'Observatoire 75014 PARIS (France)
81 # Tel. : 33 (0) 1 40 51 22 26
82 # FAX : 33 (0) 1 40 51 22 91
83 # Internet : services.iers@obspm.fr
84 #
85 # Paris, 4 July 2009
86 #
87 # Bulletin C 38
88 #
89 # To authorities responsible
90 # for the measurement and
91 # distribution of time
92 #
93 # INFORMATION ON UTC - TAI
94 #
95 # NO positive leap second will be introduced at the end of December 2009.
96 # The difference between Coordinated Universal Time UTC and the
97 # International Atomic Time TAI is :
98 #
99 # from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 s
100 #
101 # Leap seconds can be introduced in UTC at the end of the months of December
102 # or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
103 # six months, either to announce a time step in UTC, or to confirm that there
104 # will be no time step at the next possible date.
105 #
106 # Daniel GAMBIS
107 # Director
108 # Earth Orientation Center of IERS
109 # Observatoire de Paris, France
|