[time-nuts] Primary Time Standards

[Tony Finch]

Magnus Danielson <magnus at rubidium.dyndns.org> wrote:
>
> If you read the fine-print, the SI second is now defined for sea-level gravity
> and at 0 K black-body raditation, so compensation for these effects should be
> done.

The definition of the second is independent of your frame of reference,
otherwise it wouldn't be a universal unit of measurement. When the SI
second is used to create a timescale then it must be referred to a
standard frame of reference. In the case of TAI and UTC, the frame of
reference is the rotating geoid.

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
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