Magnus and all, interestlingly the discussion about GMT seem to be a never ending story, all over the world. As I know GMT was already renamed in the year 1925 ( or 1928 acc. other source ) to UT and "universal time coordinated" (U T C) (that) is standard since January 1, 1972. acc. "About the Time" :
http://www.fai.org/astronautics/time.asp , look into the short overview to this history. "Does anyone know the exact difference between GMT and UTC?" - this question seem to be already very old, Magnus. Richard B. Langley wrote a summary trying to give the right answer with "A Few Facts Concerning GMT, UT, and the RGO ". His article can be found here: http://www.apparent-wind.com/gmt-explained.html It summarizes: "The Greenwich mean time, GMT, has today only an historical interest. It has been abandoned since the thirties for successively the T U 1, the T U 2 and finally, in 1972, for the much more regular universal time coordinated, U T C, that must be used for all present use." ! That is what I thought as well quite a while. But I had to change ever so often all kind of scientific and technical units, and I see the need to adopt it, I am sure we have to be open for more steps into the future. Learning will never end...! Arnold On Tue, 17 Mar 2009 21:12:18 -0000, Jean-Louis Oneto wrote: >Hello, >The French Legal Time Reference is defined since a 1978 decree by the >UTC(OP) realisation of UTC, as stated here: >http://syrte.obspm.fr/index.php?prefix=temps&lang=en >Furthermore, the International Earth Rotation Service at Paris Observatory >is responsible for the leapseconds insertion in UTC... >Have a nice day, >Jean-Louis Oneto >Grasse - France >----- Original Message ----- >From: "Magnus Danielson" <mag...@rubidium.dyndns.org> >To: "Discussion of precise time and frequency measurement" ><time-nuts@febo.com> >Sent: Tuesday, March 17, 2009 7:27 PM >Subject: Re: [time-nuts] Loran-C & French Clocks >> Arnold, >> >>> I therefore cannot see any problem is with France, >>> but we have the need to define more precise and stable >>> reference time from where we can then measure and add >>> the Earth and Solar instabilities for our daily used standard >>> watches, in order to be enabled still to continue living and >>> travelling sun synchronously.... >>> >>> I hope not having been informed wrong so far, >>> kind regards and always precise time >> >> Please recall that just because the TAI and UTC clocks is being >> maintained by BIPM just outside of Paris does not mean the same as being >> legally accepted basis of time within France. >> >> Citing relevant law stating that the time of France shall be UTC + 1h >> for normal time and UTC + 2h for summer time is providing the piece of >> the puzzle that I was asking for. >> >> I have read Swedish and Danish law in this respect, as well as most >> translations of the EC directive on summertime. >> >> It should be noted that I do not assume UTC = GMT. >> >> Cheers, >> Magnus >> _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
