[LEAPSECS] Nit-pick: SI second

[Tony Finch]

On Mon, 7 Feb 2011, Hal Murray wrote:

>

> Doesn't it depend upon gravity (aka sea level)?  Is that standardized?


Yes. The SI second is defined independent of any reference frame.  The
TAI second is the SI second as realised on the geoid. There are other
timescales that are based on SI seconds in particular reference frames,
most notably TCG and TCB.

Tony.
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