On 2/7/2011 2:49 PM, Tony Finch wrote:
On Mon, 7 Feb 2011, Finkleman, Dave wrote:
This discussion exposes the fact that we don't all have to work in the
same reference frame or time system - as long as we understand what we
are using and make it clear to users.
Though the whole point of universal time is that it's the default timscale
for civil use and only specialists should need anything else.
Tony.
Many units are derived from the second. While I might be interested in
reporting
the time of day of an event in UTC, I will make virtually all other
measurements,
such as current, force, mass, and length, in units derived from the SI
second as
it exists in my reference frame. If I carry out a precision realization
of any of the
other units, the SI second in my reference frame will follow, even if I
don't have
an atomic clock.
Gerry Ashton
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