nanog mailing list archives
Re: F-ckin Leap Seconds, how do they work?
From: Marshall Eubanks <marshall.eubanks () gmail com>
Date: Thu, 5 Jul 2012 11:14:59 -0400
On Thu, Jul 5, 2012 at 9:55 AM, Peter Lothberg <roll () stupi se> wrote:
Leap seconds are to align the artificial and very stable atomic timescale with the irregular and slowing rotation of the earth.You are assuming facts not in evidence. The rotation is merely irregular w= ithin the capabilities of our scheme of measurement, calculation, and obser= vation. Once upon a time eclipses of the sun and moon were "random magic",= before the mechanism was understood. So to the periodic cycles of the rot= ation of the earth about its axis, the planet about the sun, etc., are view= ed as "magical". This is not due to magic, but rather limitations of under= standing.Earth is 10e-8 in frequency, a nanosecond a day is kindof 10e-14 on frequency. Tom has done the work to document it.. http://www.leapsecond.com/museum/earth/
And, by the way, the deformations and exchanges of angular momentum that drive Earth rotation variations are probably the best understood global geophysical processes there are. Absolutely no magic is required. Regards Marshall
--Peter
Current thread:
- Re: F-ckin Leap Seconds, how do they work?, (continued)
- Re: F-ckin Leap Seconds, how do they work? Paul Graydon (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Steve Allen (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Saku Ytti (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Tony Finch (Jul 03)
- RE: F-ckin Leap Seconds, how do they work? Keith Medcalf (Jul 03)
- RE: F-ckin Leap Seconds, how do they work? Tony Finch (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Majdi S. Abbas (Jul 03)
- RE: F-ckin Leap Seconds, how do they work? Keith Medcalf (Jul 03)
- RE: F-ckin Leap Seconds, how do they work? Tony Finch (Jul 03)
- RE: F-ckin Leap Seconds, how do they work? Peter Lothberg (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? Marshall Eubanks (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? George Herbert (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? Randy Fischer (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Tony Finch (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Joel jaeggli (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? valdis . kletnieks (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Joel jaeggli (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Jay Ashworth (Jul 03)
- Message not available
- Fwd: Re: F-ckin Leap Seconds, how do they work? shawn wilson (Jul 03)
- Re: Fwd: Re: F-ckin Leap Seconds, how do they work? valdis . kletnieks (Jul 03)
- Re: Fwd: Re: F-ckin Leap Seconds, how do they work? Chris Adams (Jul 03)