On Jan 21, 2013, at 10:28 AM, Steve Allen wrote: > Radio Regulation 2.5 implies that UTC is connected with earth rotation: > > 2.5 Whenever a date is used in connection with Coordinated > Universal Time (UTC), this date shall be that of the prime > meridian at the appropriate time, the prime meridian > corresponding to zero degrees geographical longitude.
On Jan 21, 2013, at 12:01 PM, Poul-Henning Kamp wrote: > Grasping at straws, are we ? We've gotten quite good at grasping straw: http://youtu.be/JxbMYx8OFds :-) As with the two timestamps above, clocks are subdivisions of calendars. The concept of a prime meridian is an implicit statement that clocks are approximations to subdivisions of the synodic day, that is, that clocks keep mean solar time. On the other hand, a clock that is not an approximation to solar time will be ultimately incommensurable with the calendar. It is notions like leap hours that grasp at straws. Rob _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
