Eventually you get there: http://www.bipm.org/en/scientific/tai/time_server.html
and find out that these folks have signed to it: http://www.bipm.org/en/convention/member_states/ Think I'll skip the research as to how much of the World this covers. On 29 March 2010 00:36, Magnus Danielson <[email protected]> wrote: > Chris Cheney wrote: >>> >>> I think that is the BIPM (http://www.bipm.org/en/home/) in association >>> with the IERS (http://hpiers.obspm.fr/) >>> >>> Peter >>> >>> >>> On 28 March 2010 10:29, Steve Rooke <[email protected]> wrote: >>> >>>> >>>> What puzzles me is who is the keeper of "legal time" for the other >>>> 93.4% of land mass and 95.5% of population of the World other than the >>>> US. >>>> >> >> _By definition_ (ITU-R-TF.460-4, Annex 1), the keeper of UTC is BIPM with >> assistance from the IERS. But "legal time", being a national matter, is >> something quite different and might or might not be aligned with UTC, >> depending on the individual nation state. > > ITU gets its authority from being an UN organisation. The reason they have > TF.460-4 is because there are radio transmitters for time. Nowadays that > document should be handled differently than ITU-R. > > BIPM gets its authority from the signature nations of the metric convention, > which then meet in the General Conference on Weights and Measures (CGPM) and > International Committee for Weigths and Measures. > > http://www.bipm.org/en/convention/ > http://www.bipm.org/en/convention/cgpm/ > http://www.bipm.org/en/committees/cipm/ > http://www.bipm.org/en/convention/member_states/ > > In addition to all that, there is a number of related organisations for > related calibration, traceability and accreditations. ISO is also a part of > the mixture. > > Just go to BIPM and the above links and read for yourselves. With a little > curiosity you will eventually figure out how everything connects. > > It all boils down to nations signing a number of binding agreements. That > creates a common reference system, mutual recognition, same procedures etc. > > Cheers, > Magnus > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Steve Rooke - ZL3TUV & G8KVD A man with one clock knows what time it is; A man with two clocks is never quite sure. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
