[154422] in North American Network Operators' Group
RE: F-ckin Leap Seconds, how do they work?
daemon@ATHENA.MIT.EDU (Tony Finch)
Tue Jul 3 18:34:06 2012
Date: Tue, 3 Jul 2012 23:33:22 +0100
From: Tony Finch <dot@dotat.at>
To: Keith Medcalf <kmedcalf@dessus.com>
In-Reply-To: <85c752350c2e434f9c86242d474c4614@mail.dessus.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Keith Medcalf <kmedcalf@dessus.com> wrote:
>
> You are assuming facts not in evidence. The rotation is merely
> irregular within the capabilities of our scheme of measurement,
> calculation, and observation.
There is LOTS of evidence that the earth's rotation is irregular. VLBI,
laser ranging of the moon, etc. This was known long before the atomic
clock was invented, and it is why the definition of the second was changed
from one based on earth rotation to one based on Newcomb's ephemerides,
before the change to an atomic second.
Tony.
--
f.anthony.n.finch <dot@dotat.at> http://dotat.at/
Hebrides, Bailey: East backing northeast 5 or 6, decreasing 4 later in
Hebrides. Rough in Bailey at first, otherwise moderate. Rain at times, fog
patches. Moderate, occasionally very poor.
