| leapseconds (181418) | leapseconds (181424) |
|---|---|
| 1# @(#)leapseconds 8.5 | 1# @(#)leapseconds 8.6 |
| 2 3# Allowance for leapseconds added to each timezone file. 4 5# The International Earth Rotation Service periodically uses leap seconds 6# to keep UTC to within 0.9 s of UT1 7# (which measures the true angular orientation of the earth in space); see 8# Terry J Quinn, The BIPM and the accurate measure of time, 9# Proc IEEE 79, 7 (July 1991), 894-905. --- 29 unchanged lines hidden (view full) --- 39Leap 1990 Dec 31 23:59:60 + S 40Leap 1992 Jun 30 23:59:60 + S 41Leap 1993 Jun 30 23:59:60 + S 42Leap 1994 Jun 30 23:59:60 + S 43Leap 1995 Dec 31 23:59:60 + S 44Leap 1997 Jun 30 23:59:60 + S 45Leap 1998 Dec 31 23:59:60 + S 46Leap 2005 Dec 31 23:59:60 + S | 2 3# Allowance for leapseconds added to each timezone file. 4 5# The International Earth Rotation Service periodically uses leap seconds 6# to keep UTC to within 0.9 s of UT1 7# (which measures the true angular orientation of the earth in space); see 8# Terry J Quinn, The BIPM and the accurate measure of time, 9# Proc IEEE 79, 7 (July 1991), 894-905. --- 29 unchanged lines hidden (view full) --- 39Leap 1990 Dec 31 23:59:60 + S 40Leap 1992 Jun 30 23:59:60 + S 41Leap 1993 Jun 30 23:59:60 + S 42Leap 1994 Jun 30 23:59:60 + S 43Leap 1995 Dec 31 23:59:60 + S 44Leap 1997 Jun 30 23:59:60 + S 45Leap 1998 Dec 31 23:59:60 + S 46Leap 2005 Dec 31 23:59:60 + S |
| 47Leap 2008 Dec 31 23:59:60 + S |
|
| 47 48# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) 49# 50# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE 51# 52# SERVICE DE LA ROTATION TERRESTRE | 48 49# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) 50# 51# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE 52# 53# SERVICE DE LA ROTATION TERRESTRE |
| 53# OBSERVATOIRE DE PARIS | 54# OBSERVATOIRE DE PARIS |
| 54# 61, Av. de l'Observatoire 75014 PARIS (France) 55# Tel. : 33 (0) 1 40 51 22 26 56# FAX : 33 (0) 1 40 51 22 91 | 55# 61, Av. de l'Observatoire 75014 PARIS (France) 56# Tel. : 33 (0) 1 40 51 22 26 57# FAX : 33 (0) 1 40 51 22 91 |
| 57# Internet : services.iers@obspm.fr | 58# e-mail : services.iers@obspm.fr 59# http://hpiers.obspm.fr/eop-pc |
| 58# | 60# |
| 59# Paris, 18 January 2008 | 61# Paris, 4 July 2008 |
| 60# | 62# |
| 61# Bulletin C 35 | 63# Bulletin C 36 |
| 62# | 64# |
| 63# To authorities responsible | 65# To authorities responsible |
| 64# for the measurement and | 66# for the measurement and |
| 65# distribution of time | 67# distribution of time |
| 66# | 68# |
| 67# INFORMATION ON UTC - TAI | 69# UTC TIME STEP 70# on the 1st of January 2009 |
| 68# | 71# |
| 69# NO positive leap second will be introduced at the end of June 2008. 70# The difference between Coordinated Universal Time UTC and the 71# International Atomic Time TAI is : | 72# A positive leap second will be introduced at the end of December 2008. 73# The sequence of dates of the UTC second markers will be: |
| 72# | 74# |
| 73# from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s | 75# 2008 December 31, 23h 59m 59s 76# 2008 December 31, 23h 59m 60s 77# 2009 January 1, 0h 0m 0s |
| 74# | 78# |
| 79# The difference between UTC and the International Atomic Time TAI is: 80# 81# from 2006 January 1, 0h UTC, to 2009 January 1 0h UTC : UTC-TAI = - 33s 82# from 2009 January 1, 0h UTC, until further notice : UTC-TAI = - 34s 83# |
|
| 75# Leap seconds can be introduced in UTC at the end of the months of December | 84# Leap seconds can be introduced in UTC at the end of the months of December |
| 76# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every 77# six months, either to announce a time step in UTC, or to confirm that there | 85# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every 86# six months, either to announce a time step in UTC or to confirm that there |
| 78# will be no time step at the next possible date. 79# 80# Daniel GAMBIS | 87# will be no time step at the next possible date. 88# 89# Daniel GAMBIS |
| 81# Head 82# Earth Orientation Center of the IERS | 90# Head 91# Earth Orientation Center of IERS |
| 83# Observatoire de Paris, France | 92# Observatoire de Paris, France |