If you are in Germany the Zugspitze at 2962 meter and Garmisch 700 meter would be perfect. Good amenities at both locations.                                                                                                                                                                                                         Bert Kehren                                                                                                                                                                                                                                                                                                   In a message dated 11/27/2021 5:12:19 PM Eastern Standard Time, jim@luxfamily.com writes:  On 11/27/21 12:37 PM, Thomas Valerio wrote: > I think that Tom's GREAT adventure is kind of what sealed the deal making > me a time-nut or at least a time-nuts lurker, a lot of this stuff is still > little over my head, but I keep reading. > > If anyone is inclined and has the clocks and the kids ( I don't have > either ), there is always Mount Evans and Pikes Peak, although you may > have to leave the clocks behind overnight.  Mount Evans is still on my > bucket list but without clocks and two or three days of time to monitor > them, I don't think I will be doing the Mount Evans edition of GREAT.  For > anyone that is flush enough to afford or can beg, borrow or steal access > to a Microsemi chip scale atomic clock, I think a Mount Evans edition > would be an awesome addition to Tom's original work. > >    Thomas Valerio > I don't think a CSAC would be good enough. Tom's experiment was 22 ns out of 42 hours or about 1.45E-13. That's quite a bit smaller than a CSAC adev over that period. There's a variety of roads that go to ~12,000 ft in Colorado, about ~10,000 in CA (Tioga Pass isn't closed yet), so you can get about 3x change, but still you're talking <1E-12. Mammoth Mtn has a gondola to the top, but it's only 11,000. There may be a ski resort in CO that's higher. >> For newcomers to time-nuts, Andy is asking about my DIY gravitational >> time dilation experiment(s). >> >>  > What am I missing? >> >> It looks like you used the wrong value (or wrong units) for "h". >> >> The summit of Mt Rainier is 14411 ft (4400 m), but the highest point on >> Mt Rainier that is accessible by road is the Paradise visitors center at >> 5400 ft. Our house is at 1000 ft elevation so the net difference in >> elevation of the clocks was 4400 ft (1340 m). >> >> The clock(s) on the mountain ran fast by gh/c² = 9.8 × 1340 / (3e8)² = >> 1.5e-13. Fast clocks gain time. We stayed for about 42 hours so the net >> time dilation was 42×3600 × gh/c² = 22 ns. >> >> ---- >> >> For more information see the Project G.R.E.A.T. 2005 page: >> >> http://leapsecond.com/great2005/ >> >> Better yet, these two recent talks from 2018 and 2020 cover all 3 GREAT >> experiments: >> >> <http://web.stanford.edu/group/scpnt/pnt/PNT18/presentation_files/I08-VanBaak-GPS_Flying_Clocks_and_Relativity.pdf> >> >> <http://leapsecond.com/ptti2020/2020-PTTI-tvb-Atomic-Timekeeping-Hobby.pdf> >> >> Lots of time nutty photos in both of those! >> >> /tvb >> >> >> On 11/27/2021 7:33 AM, Andy Talbot wrote: >>> Just been reading your adventures with 3 Cs clocks, a mountain and 3 >>> kids, >>> but I can't make the estimate of time dilation work out. >>> You measured ~ 23ns and say it agrees with calculation >>> >>> The equation quoted in a related reference, for "low elevations" is >>> g.h/c² >>> which if you plug in g = 9.81 m/s²  and h = 4300m for Mt Rainer gives >>> an >>> expected value of 4.7 * 10^-16. >>> Over 2 days, 2 * 86400s, that would be 81 ns in total, four times your >>> value >>> >>> What am I missing? >>> >>> Was just speculating what Ben Nevis at a mere 1340m height might offer >>> >>> Andy >>> www.g4jnt.com >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >>> send an email to time-nuts-leave@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >> an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com To unsubscribe, go to and follow the instructions there.