Sovereign states have some degree of control over civil time; the
remaining control is
in the control of individuals, either through personal whims or
voluntary collective
action. The IAU, ITU, BIPM, ISO, and all the rest do not have control
over civil timekeeping
because the weights and measures inspectors who enforce measurement laws do
not take orders from them, they take orders from the sovereign state
that employs them.
Gerry Ashton
On 2/8/2011 11:50 AM, Rob Seaman wrote:
I said:
Civil timekeeping is a worldwide system.
Poul-Henning Kamp wrote:
No it is not.
It is remarkable how the most aggressive responses to my posts are when I mention "system
engineering" or "best practices" or otherwise suggest that this is fundamentally an
exercise in proper system design.
Nobody can prevent your government or my government from defining local time as
UTC + Xh 31 minutes + 41.5 seconds.
Sounds like a good argument for a coherent international process, not for
tossing the UTC baby to the dingos.
UTC is not civil time anywhere,
I understand that you wish to assert that local time == civil time. But you
also assert that computer networks worldwide must be synchronized. Is this
latter somehow not a civil function?
Local time is layered on UTC
The former deals with local foibles. The latter with global standards. One of
those standards is the synodic day. UTC is layered on TAI, which introduces a
separate global standard, the SI-second.
The three layers work together. If we're to entertain remodeling the
underlying architecture on a fundamental scale then system engineering best
practices are the tools to do this.
Rob
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