[LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds
seaman at noao.edu
Mon Oct 25 00:50:32 EDT 2010
On Oct 24, 2010, at 6:30 PM, Warner Losh wrote:
> And what are these other time scales available today?
I suppose it depends on what "time scale" means. Start with all the zone times, of course. Then all the scientific time scales, TT, etc. Engineering time scales - if one is pedantic, anything with its own clock defines a time scale - or anything containing an oscillator of any sort, for that matter.
>> I personally find it weird that the keepers of the atomic clocks apparently want to (also) kill off TAI (International Atomic Time).
> Interesting, but not relevant.
The motivation of those pursuing the redefinition of UTC is relevant.
> UTC is the only game in town, for all practical purposes.
We likely have different definitions of "practical", and different ideas of the scope of the word "all".
> It is the only one broadcast world wide in real time,
Well, yes - for those who dismiss GPS as an option. Also, let's not completely ignore the original notion of UTC to convey realizations of both UT1 and TAI. It doesn't seem a step forward to throw out two of the three.
The Earth itself is the most robust timekeeper (if not most regular).
> it is the only one that will stand up in court.
A contract specifying a different time scale should be enforceable in most jurisdictions.
> Leap seconds make UTC a non-uniform-radix time notation, which is pretty weird.
Our wobbling home does that. Leap seconds are a means to an end. By all means lets consider others.
Define the problem, solve the problem - not the other way round.
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