Re: [Ntp] Leap second draft

[Steve Allen <[e-mail]>]

On Sat 2019-03-30T14:24:16-0400 Daniel Franke hath writ:
> No, these details aren't strictly necessary, but neither do they
> excessively complicate things and I think keeping them in leads to
> better ontological clarity. I'd especially like to keep the
> map/territory distinction between TAI and TT intact.

Note that TT was not defined until 1991.  NTP was already in use.

Note that the definition of TAI did not match the definition of
TT until 2018-11 when CGPM 26 approved Resolution 2.
Note that TT and TAI are now defined at the geopotential level
W_0 = 62 636 856.0 m^2 s^-2
and that chronometers at other potentials run at different rates.

Note that effective 2019-05-20 Resolution 1 of CGPM 26 redefines the
SI such that the fundamental unit is the hertz [Hz] and that the
second [s] will be a derived unit.

So long as civil calendar days are based on measurements of the
rotating earth the long-term behavior of simple differences between
time stamps of UTC and NTP match the mean solar second, not the SI
second.

Are you sure that you want to specify that NTP uses the SI second?

--
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