RESEARCH TOWARD FEASIBILITY OF AN INSTRUMENT FOR MEASURING VERTICAL GRADIENTS OF GRAVITY
Abstract
The theories for the determination of the Newtonian gravitation constant (G) and the earth's gravitational constant (GM) have been examined. Two experiments have been considered for determining the Newtonian constant, one of which appears to be capable of improving the accuracy of measurement of G by at least one order of magnitude. Measurement of GM by gradient techniques does not, however, appear to yield any improved accuracy. Experimental tests have demonstrated that the rotating gravitational gradient sensor concept is capable of measuring static gravitational gradients in the 1 g environment of the earth and that the sensor designs have the accuracy needed for useful measurements (5 to the minus 9th power/square sec). A design of a prototype transportable gradiometer system has been completed and a program for fabrication and test has been established. A study of sensor applications indicates that these sensors can aid in airborne gravimetry surveys by improving the guidance system performance and by obtaining a real time measurement of local gravity anomalies.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0828853
Entities
People
- Robert L. Forward
Organizations
- HRL Laboratories