Michael Deckers <[email protected]> wrote: > > But ephemeris time was deduced from astronomical observations of the > Moon, not from quartz clocks.
Thanks for the clarifications. I wanted to emphasize that during the "short reign of ephemeris time" reference clocks were not corrected by observations of earth orientation, or at least that was not how the most accurate corrections were made. And that quartz clocks were more stable than observations of earth orientation but not more stable than observations of the moon. Quartz clocks have problems with their frequency changing as they age, and it took oo damn long to get frequency corrections from the moon :-) Tony. -- f.anthony.n.finch <[email protected]> http://dotat.at/ Malin: Variable 3 or 4. Slight or moderate. Mainly fair. Good. _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
