[email protected] said: > Different regions can have different phase behavior. I have only seen West > Coast plots on this list. When I did some work with this in Minnesota in the > eighties, the phase variation was only about 6 seconds during a day and zero > from day to day.
On the west coast, the "zero from day to day" part is optimistic. I agree that they generally do a good job, but there are times when they shift by more than 1 second per day, averaged over a month. Here is an example: http://users.megapathdsl.net/~hmurray/time-nuts/line/Calif-60Hz-2015-May.png Zooming out: http://users.megapathdsl.net/~hmurray/time-nuts/line/Calif-60Hz-2014-2015.pn g ------ There is an interesting question. If you keep time by counting cycles, how do you get started? I assume there is an official cycle counting clock deep in a control center. Is there a backup? What do they do when the control center loses power? ... -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
