On 2010-02-11, David J Taylor <david-tay...@blueyonder.delete-this-bit.and-this-part.co.uk.invalid> wrote: > Thanks, John. Was the measurement down to the nanosecond level?
From the abstract: Around-the-World Atomic Clocks: Observed Relativistic Time Gains J. C. Hafele 1 and Richard E. Keating 2 1 Department of Physics, Washington University, St. Louis, Missouri 63130 2 Time Service Division, U.S. Naval Observatory, Washington, D.C. 20390 Four cesium beam clocks flown around the world on commercial jet flights during October 1971, once eastward and once westward, recorded directionally dependent time differences which are in good agreement with predictions of conventional relativity theory. Relative to the atomic time scale of the U.S. Naval Observatory, the flying clocks lost 59 ± 10 nanoseconds during the eastward trip and gained 273 ± 7 nanoseconds during the westward trip, where the errors are the corresponding standard deviations. These results provide an unambiguous empirical resolution of the famous clock "paradox" with macroscopic clocks. The article is publised in: Science 14 July 1972: Vol. 177. no. 4044, pp. 168 - 170 DOI: 10.1126/science.177.4044.168 _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
