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Gravitational clock: A proposed experiment for the measurement of the gravitational constant GThe increased importance and the fundamental significance of accurately measuring the gravitational constant G are discussed along with recent or proposed experimental measurements of G. The method of using mutually gravitating bodies in the clock mode in a drag-free satellite is described. A satellite experiment consisting of the flat-plate spherical mass oscillator proposed combines the mathematical and experimental conveniences most simply. It is estimated that accuracies of 1 part in 1,000,000 are easily obtainable by careful fabrication of parts. The use of cryogenic techniques, thin films, and superconductors allows increased accuracies of two or three orders of magnitude or better. These measurements can be increased to the level of 1 part in 10 to the 11th power at which time-variations, and other variations, in G can be observed.
Document ID
19750014902
Document Type
Technical Memorandum (TM)
Authors
Smalley, L. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 3, 2013
Publication Date
January 23, 1975
Subject Category
Geophysics
Report/Patent Number
NASA-TM-X-64920
Accession Number
75N22974
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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