[LEAPSECS] Fwd: IERS Message No. 282: Coordinated Universal Time (UTC) to retain "leap second"

[mike at lumieresimaginaire.com]

NTP5 should be with us before then, hopefully with the feature of
disseminating multiple timescales. There is a hope for rubbery seconds
yet. 

On 23.11.2015 18:58, Rob Seaman wrote: 

> FYI
> 
>> Begin forwarded message: 
>> 
>> FROM: central_bureau at iers.org
>> 
>> DATE: November 23, 2015 at 9:50:38 AM MST
>> 
>> TO: messages at iers.org
>> 
>> SUBJECT: IERS MESSAGE NO. 282: COORDINATED UNIVERSAL TIME (UTC) TO RETAIN "LEAP SECOND"
>> 
>> ************************************************************************
>> IERS Message No. 282                                   November 23, 2015
>> ************************************************************************
>> 
>> Coordinated Universal Time (UTC) to retain "leap second"
>> 
>> New reference time scale to be considered by World Radiocommunication
>> Conference in 2023
>> 
>> Geneva, 19 November 2015 - The ITU World Radiocommunication Conference
>> (WRC-15), currently in session in Geneva from 2 to 27 November, has
>> decided that further studies are required on the impact and application
>> of a future reference time-scale, including the modification of
>> coordinated universal time (UTC) and suppressing the so-called "leap
>> second".
>> 
>> Leap seconds are added periodically to adjust to irregularities in the
>> earth's rotation in relation to Coordinated Universal Time (UTC), the
>> current reference for measuring time, in order to remain close to mean
>> solar time (UT1). A leap second was added most recently on 30 June 2015
>> at 23:59:60 UTC. The proposal to suppress the leap second would have
>> made continuous reference time-scale available for all modern electronic
>> navigation and computerized systems to operate while eliminating the
>> need for specialized ad hoc time systems.
>> 
>> The decision by WRC-15 calls for further studies regarding current and
>> potential future reference time-scales, including their impact and
>> applications. A report will be considered by the World
>> Radiocommunication Conference in 2023. Until then, UTC shall continue to
>> be applied as described in Recommendation ITU-R TF.460-6
>> [https://www.itu.int/rec/R-REC-TF.460-6-200202-I/en] and as maintained
>> by the International Bureau of Weights and Measures (BIPM).
>> 
>> WRC-15 also calls for reinforcing the links between ITU and the
>> International Bureau of Weights and Measures (BIPM). ITU would continue
>> to be responsible for the dissemination of time signals via
>> radiocommunication and BIPM for establishing and maintaining the second
>> of the International System of Units (SI) and its dissemination through
>> the reference time scale.
>> 
>> Studies will be coordinated by ITU along with international
>> organizations such as the International Maritime Organization (IMO), the
>> International Civil Aviation Organization (ICAO), the General Conference
>> on Weights and Measures (CGPM), the International Committee for Weights
>> and Measures (CIPM), the International Bureau of Weights and Measures
>> (BIPM), the International Earth Rotation and Reference Systems Service
>> (IERS), the International Union of Geodesy and Geophysics (IUGG), the
>> International Union of Radio Science (URSI), the International
>> Organization for Standardization (ISO), the World Meteorological
>> Organization (WMO), and the International Astronomical Union (IAU).
>> 
>> "Modern society is increasingly dependent on accurate timekeeping," said
>> ITU Secretary-General Houlin Zhao. "ITU is responsible for disseminating
>> time signals by both wired communications and by different
>> radiocommunication services, both space and terrestrial, which are
>> critical for all areas of human activity."
>> 
>> "The worldwide coordination of time signals is critical for the
>> functioning and reliability of systems that depend on time," said
>> Francois Rancy, Director of the ITU Radiocommunication Bureau. "ITU will
>> continue to work with international organizations, industry and user
>> groups towards providing coherent advice on current and potential future
>> reference time-scales."
>> 
>> Source: ITU Press Release,
>> http://www.itu.int/net/pressoffice/press_releases/2015/53.aspx
>> 
>> ************************************************************************
>> IERS Messages are edited and distributed by the IERS Central Bureau.
>> If not stated otherwise, the IERS is only the distributor of the message
>> and is not responsible for its content.
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>> please write to <central_bureau at iers.org>.
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>> ************************************************************************
> 
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