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General Relativity and Gravitation

, Volume 10, Issue 3, pp 181–204 | Cite as

A test of the equivalence principle using a space-borne clock

  • R. F. C. Vessot
  • M. W. Levine
Research Articles

Abstract

An experimental verification of Einstein's equivalence principle has been made using an atomic hydrogen maser in a space probe attaining an altitude of 10,000 km above the earth's surface. At the present stage of the data reduction, confirmation is at the 2×10−4 level of accuracy. The experiment and the resulting data are described including a comment on the limits to the anisotropy of the velocity of light. We believe that this is the first direct, high-accuracy test of the symmetry of the propagation of light and a beginning in the use of high-accuracy clocks in space to measure relativistic phenomena.

Keywords

Hydrogen Anisotropy Atomic Hydrogen Differential Geometry Space Probe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Vessot, R. F. C., and Levine, M. W. (1977). InExperimental Gravitation, ed. B. Bertotti (Atti dei Convegni Lincei, Academia Nazionale dei Lincei, Roma), vol. 34, p. 371.Google Scholar
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    Nordtvedt, K. (1976). InExperimental Gravitation, ed. B. Bertotti (Atti dei Convergni Lincei, Accademia Nazionale dei Lincei, Roma), vol. 39, p. 247.Google Scholar

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Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • R. F. C. Vessot
    • 1
    • 2
  • M. W. Levine
    • 1
    • 2
  1. 1.Center for AstrophysicsHarvard College ObservatoryUSA
  2. 2.Smithsonian Astrophysical ObservatoryCambridge

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