Hi Rhoderick, Check your estimates -- for 1 km the redshift should be 1e-13, not 1e-15.
The experiment is certainly possible. It's been done many times -- going up, and going down -- though usually above MSL. Doing it below MSL is on my TODO list; using either mine shaft (land) or bathysphere (sea). The logistics are a bit more complicated than driving clocks up a mountain. You can contact me directly for more info. To get an idea of how these experiments are done, see: http://leapsecond.com/great2016a/ http://leapsecond.com/great2005/ http://leapsecond.com/ptti2006/ /tvb ----- Original Message ----- From: "Rhoderick Beery" <rjbe...@gmail.com> To: <time-nuts@febo.com> Sent: Tuesday, February 21, 2017 9:13 AM Subject: [time-nuts] advice > Greetings Time-Nuts! > > I'm a physics theorist interested in performing an experiment to measure > the gravitational time dilation beneath the surface of the Earth. Boulby > Labs in the UK is 1.1 km down which would generate a time differential from > the surface on the order of 1 part in 10^15 -- not much to work with! > > I've investigated measuring redshift/blueshift from lasers but our > wavemeter technology is no where near accurate enough. I've concluded that > my best solution is to use atomic clocks, of which I know very little > about. I thought a clock-enthusiast mail group would be a fantastic way for > me to learn about the subject as well as possibly spur ideas on the lab > test design itself. > > Thanks in advance!! > ------- > Rhoderick Beery > direct: 402-817-9363 > _______________________________________________ > 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.