On Nov 5, 2014, at 1:59 PM, Michael Deckers via LEAPSECS <[email protected]> wrote:
> > On 2014-11-05 16:27, Zefram wrote: > >> ....................................................... UTC is always >> an integral number of seconds offset from TAI, and so by construction >> UTC(NPL) is always an integral number of seconds offset from TAI(NPL). >> Hence each of the marks also occurs at the top of a second of TAI(NPL). > > 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, where DTAI > is the number of integral seconds specified by the > International Earth Rotation Service (IERS) as > being the difference between UTC and TAI; > > I do not know whether that notation has ever been put > to serious use outside this recommendation. Ah, that’s interesting. That also post-dates my research about what to call a TAI time scale that’s based on UTC for our product. Outside of this list, I’ve not seen TAI(k) and had been told that the notation I posted would likely be what people would expect, but it would be even better if we called it something else entirely to avoid confusion. At the time, I couldn’t find anything beyond ‘Please don’t call something you do TAI unless you are BIPM’ :). Warner
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