A-priori "imprinting" of General Relativity itself on some tests of it?

Details A-priori "imprinting" of General Relativity itself on some tests of it? A-priori "imprinting" of General Relativity itself on some tests of it?

2010-02-24

arxiv.org/abs/1002.4596v1

Advances in Astronomy Volume 2010 (2010), Article ID 735487

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTex, 11 pages, no figures, no tables. Accepted in Advances in Astronomy

Scientific paper

10.1155/2010/735487

We investigate the effect of possible a-priori "imprinting" effects of general relativity itself on satellite/spaceraft-based tests of it. We deal with some performed or proposed time-delay ranging experiments in the Sun's gravitational field. It turns out that the "imprint" of general relativity on the Astronomical Unit and the solar gravitational constant GM_{\odot}, not solved for in the so far performed spacecraft-based time-delay tests, induces an a-priori bias of the order of 10^-6 in typical solar system ranging experiments aimed to measuring the space curvature PPN parameter gamma. It is too small by one order of magnitude to be of concern for the performed Cassini experiment, but it would affect future planned or proposed tests aiming to reach a 10^-7-10^-9 accuracy in determining gamma.

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