[ntp:questions] Re: Deadline soon for leap second comments
michael.no.spam.cook at wanadoo.fr
Sun Oct 9 20:54:11 UTC 2005
<snip> all that is gold...
Thanks for the excellent and comprehensive documentation. I haven't
trawled it all , but it seems to me that common sense should prevail.
" If it isn't broke, don't fix it!"
From the history of time measurement, we can see that the modifidations
that have been made in recent times, definitions of UT0, UT1 etc, have
been made to give better numerical approximations to a continuing and
non predictable variation in the earths rotation. It should be also
evident that however close we get to understanding the causes and
amplitudes of these variations, the butterfly will be one step ahead.
The application of leap seconds allows these changes to be reflected in
a timespan which is comprehensible by humans. All the mechanisms to
measure and agree on any neccessary modifications are already in place
and the SIZE of the change is not perceptible by humans and so doesn't
perturb them. Whereas, adding/subtracting hours on a xxx year cycle is
essentially revolutionary rather than evolutionary. Abandoning the
current practice will leave any future modifications to the whim of the
wind and political expediancy.
Note also that human interaction with the earth may be having an
impact that will soon be detecatable in tha earths rotation and I may
accelerate those changes. I am thinking of the displacement of water
mass with climate change.
I am an optimist by heart, but I expect that if our activity changes
our climate to the extent that seems to be likely, at least leap seconds
will allow us to time our demise with better precision.
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