[tz] Potted history of timekeeping from the BBC
marshall.eubanks at gmail.com
Mon Apr 10 16:24:12 UTC 2017
On Tue, Apr 4, 2017 at 11:07 AM, Derick Rethans <tz at derickrethans.nl> wrote:
> On Tue, 4 Apr 2017, Randal L. Schwartz wrote:
> > >>>>> "John" == John Haxby <john.haxby at oracle.com> writes:
> > John> (If you're ever near Greenwich I recommend visiting the Royal
> > John> Observatory, taking the obligatory foot-in-both-hemispheres selfie
> > John> and then going to look at the clocks.)
> > And you should also note that the location where they charge you to take
> > that photograph is about 20 meters to the west of where it should be.
> > At least, I presume my modern smartphone's GPS is fairly accurate, as
> > well as having looked it up on Google Earth later.
> I always thought that the meridian line as marked is 0° in *OSGB36*, not
> WGS84 which is what GPS uses:
George Kaplan and his colleagues went into why the "Greenwich Meridian"
moved pretty exhaustively.
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