"Greg Hennessy" <greg.hennessy@> wrote in message news:It%cn.19853
[]
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.
Greg, thanks for that. It sounds as if the measurements were down to the
ten-nanosecond level or so. Those of us at the microsecond level may be
spared relativistic corrections.
A pity they make you pay to see an article that old.
Cheers,
David
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