[time-nuts] Garmin GPS12XL V3.51

[Tim Shoppa]

Beyond the predictability of physical variation, there is also the unknown
probability of a human decision to abolish leap seconds, while also
continuing to satisfy the various legal requirements around the world that
civil time be tied to the Sun.
https://en.wikipedia.org/wiki/Leap_second#Proposal_to_abolish_leap_seconds

Tim N3QE

On Thu, Apr 11, 2019 at 3:01 PM Adrian Godwin <artgodwin at gmail.com> wrote:

> Thanks. So the current estimate of 13 is towards the high end and variation
> is large enough that 40 years with might be sufficiently low that only 1
> rollover is assumed. Not likely to overflow the leap second count early
> either.
>
>
> On Thu, Apr 11, 2019 at 3:01 PM Tony Finch <dot at dotat.at> wrote:
>
> > Adrian Godwin <artgodwin at gmail.com> wrote:
> > >
> > > How much variation in the rate of leap second insertion is there?
> >
> > 1972-01-01 - 1992-01-01 : 17
> > 1973-01-01 - 1993-01-01 : 16
> > 1974-01-01 - 1994-01-01 : 16
> > 1975-01-01 - 1995-01-01 : 16
> > 1976-01-01 - 1996-01-01 : 15
> > 1977-01-01 - 1997-01-01 : 15
> > 1978-01-01 - 1998-01-01 : 15
> > 1979-01-01 - 1999-01-01 : 14
> > 1980-01-01 - 2000-01-01 : 14
> > 1981-01-01 - 2001-01-01 : 13
> > 1982-01-01 - 2002-01-01 : 12
> > 1983-01-01 - 2003-01-01 : 11
> > 1984-01-01 - 2004-01-01 : 10
> > 1985-01-01 - 2005-01-01 : 10
> > 1986-01-01 - 2006-01-01 :  9
> > 1987-01-01 - 2007-01-01 : 10
> > 1988-01-01 - 2008-01-01 : 10
> > 1989-01-01 - 2009-01-01 :  9
> > 1990-01-01 - 2010-01-01 : 10
> > 1991-01-01 - 2011-01-01 :  9
> > 1992-01-01 - 2012-01-01 :  8
> > 1993-01-01 - 2013-01-01 :  8
> > 1994-01-01 - 2014-01-01 :  7
> > 1995-01-01 - 2015-01-01 :  6
> > 1996-01-01 - 2016-01-01 :  7
> > 1997-01-01 - 2017-01-01 :  6
> > 1998-01-01 - 2018-01-01 :  6
> > 1999-01-01 - 2019-01-01 :  6
> > 2000-01-01 - 2020-01-01 :  6
> >
> > Tony.
> > --
> > f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
> > Trafalgar: In east, northerly 5 or 6. In west, variable 3 or 4. In east,
> > moderate, occasionally rough. in west, moderate, occasionally rough in
> > north.
> > In east, fair. In west, mainly fair. In east, good. In west, good.
> >
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