[LEAPSECS] the big artillery
michael.deckers at yahoo.com
Wed Nov 5 15:13:29 EST 2014
On 2014-11-05 11:28, Steffen Nurpmeso wrote:
> Oh, the German Physikalisch-Technische Bundesanstalt (PTB) also
> has a general -- at least -- overview of the set of problems.
> (English:  and all around that; oops, not everything is
> translated, what a shame! I hope it's not due to lack of
> resources, which seems to become notorious in Germany [for things
> that really matter at least].)
>  <https://www.ptb.de/cms/en/fachabteilungen/abt4/fb-44/ag-441/realisation-of-the-si-second.html>
> Rest under
The very beginning of the last reference is misleading and
"Properties of UTC
The time scale UTC (Coordinated Universal Time) owes its
existence to the CCIR (International Consultative Committee
of Radiocommunications) of the ITU (International
Telecommunications Union) which proposed to broadcast
time signals worldwide in a "coordinated" way, i.e.
by reference to a common time scale."
The concept for UTC was devised by people from the BIH
and some other metrology institutes, not by the CCIR;
and the CCIR has never produced a time scale. It is
unfortunate that most sources about time and time scales
are full of inaccuracies and errors like these, perpetuated
through hundreds of papers and books.
Steve Allen's page
gives a carefully researched, reliable account of the history
of UTC and other time scales, based on the primary sources.
It is the result of an enormous labor in extracting the facts
from a mixture with myth and hearsay.
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