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: [1] 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].)
......
[1]
<https://www.ptb.de/cms/en/fachabteilungen/abt4/fb-44/ag-441/realisation-of-the-si-second.html>
Rest under
<https://www.ptb.de/cms/en/fachabteilungen/abt4/fb-44/ag-441/realisation-of-legal-time-in-germany/>
The very beginning of the last reference is misleading and
wrong:
"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
[http://www.ucolick.org/~sla/leapsecs/timescales.html]
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.
Michael Deckers.
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