Analysis of the capability and limitations of relativistic gravity measurements using radio astronomy methods

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gravitational Fields, Radio Astronomy, Radio Interferometers, Relativistic Theory, Error Analysis, Gravitational Constant, Perturbation Theory, Wave Propagation

Scientific paper

The uses of radar observations of planets and very-long-baseline radio interferometric observations of extragalactic objects to test theories of gravitation are described in detail with special emphasis on sources of error. The accuracy achievable in these tests with data already obtained, can be summarized in terms of: retardation of signal propagation (radar), deflection of radio waves (interferometry), advance of planetary perihelia (radar), gravitational quadrupole moment of sun (radar), and time variation of gravitational constant (radar). The analyses completed to date have yielded no significant disagreement with the predictions of general relativity.

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