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: [email protected] >> >> DATE: November 23, 2015 at 9:50:38 AM MST >> >> TO: [email protected] >> >> 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. >> To submit texts for distribution and to subscribe or unsubscribe, >> please write to <[email protected]>. >> Archives: http://www.iers.org/Messages/ >> ************************************************************************ > > _______________________________________________ > LEAPSECS mailing list > [email protected] > https://pairlist6.pair.net/mailman/listinfo/leapsecs
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