[LEAPSECS] the big artillery
zefram at fysh.org
Thu Nov 6 07:22:37 EST 2014
Michael Deckers via LEAPSECS wrote:
> The symbol TAI(k) is defined in
> RECOMMENDATION ITU-R TF.536-2: Time-scale notations
> of 2003 with the text:
> TAI(k): Time-scale realized by the institute "k" and defined
> by the relation TAI(k) = UTC(k) + DTAI,
Oh cool, same as my definition. I didn't know about this Recommendation.
I thought this notation was natural and intuitive, as a way of referring
to this concept, and it's nice to have that supported by an independent
coinage. Also nice to now be able to refer to a definition with higher
status than "stuff wot I just thought up".
> The contributions by the various metrology institutes to TAI
> are independent from the UTC(k) and are denoted by TA(k) in
> Circular T by the BIPM.
There aren't enough TA(k) to account for all the contributions to TAI.
The TA(k) are a small group, very rarely adding new ones, and notably
lacking some of the major contributors to TAI. There's no TA(NPL),
More information about the LEAPSECS