On Jun 15, 2007, at 3:06 AM, M. Warner Losh wrote:

It all depends on how you define 'mean' and what the acceptable error in your current estimator of that mean is. Civilization, at least in the USA, has shown that it can tolerate over an hour and a half deviation from mean local solar time (Time Zones and Daylight Savings Time show this).

Again, I won't belabor previous discussions. Deviations between local time and zone time are static - and persist whether or not there are leap seconds. Deviations between apparent solar time and mean solar time are periodic. Embargoing leap seconds would introduce a secular term. This is something new. The familiar figure eight of the analemma would no longer close upon itself.

Rob Seaman
NOAO

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