LETTER TO THE EDITOR: dG/dt measurement and the timing of lunar laser ranging observations

Details LETTER TO THE EDITOR: dG/dt measurement and the timing of lunar laser ranging observations LETTER TO THE EDITOR: dG/dt measurement and the timing of lunar laser ranging observations

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cqgra..20l.147n&link_type=abstract

Classical and Quantum Gravity, Volume 20, Issue 11, pp. L147-L154 (2003).

Physics

1

Scientific paper

Two fundamental tests of general relativity are achieved using over three decades of lunar laser ranging (LLR) data - confirming the equality of the Sun's acceleration rate of the Earth and Moon to about a part in 1013 precision, and finding no time variation in the strength of Newton's G to precision of a part in 1012 per year. LLR is an ongoing mission, and these tests of physical theory should remain at the frontier of precision for time to come. The contribution of each individual LLR measurement to the precision of dotG determination varies strongly through the lunar motion's monthly cycle and from month to month. A worth function which quantifies this variation is derived and illustrated: it can be employed by observers who have scheduling discretions in order to more rapidly improve the estimation precision for the scientific parameter dotG.

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