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Episode 211 was a good primer on celestial navigation. It covers time piece construction. Building your own backyard continental drift hardware would be high on the coolness scale. ------Original Message------ From: Wolfgang Sender: time-nuts-boun...@febo.com To: Discussion of precise time and frequency measurement ReplyTo: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] BYMLBI (Back Yard Medium LBI) Sent: Mar 18, 2011 8:58 PM On Friday 18 March 2011, Brooke Clarke wrote: > For a number of decades I've tried to figure out a way to measure the > period of the Earth's rotation accurate to at least 1 ms. > > [...] > > Is it possible to do it using a radio method in my (large) back yard? > 1 ms / day = 1.2e-8 = 460um position accuracy on the ground. If the measurement takes more than a couple of days, continental drift may need to be considered. - Wolfgang, DL1SKY _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.