Document Type and Number:
Japanese Patent JPS542113
Kind Code:
B1
Abstract:
An improved gravity gradiometer and system for use thereof for accurately measuring gravity gradients from moving vehicles. The gradiometer comprises a symmetrically configured float buoyantly supported in a high-density, low-viscosity fluid within a symmetrically configured case of slightly larger size. The instrument is configured and maintained such that the float is neutrally buoyant. Further, the mass of the float is distributed in accordance with the particular gravity gradient sought to be measured. The float is suspended in 6 DEG of freedom via a highly sensitive electric or magnetic suspension system which, in combination with a feedback control loop, acts to measure the desired component or combination of components of the gravity gradient in a manner described. The gradiometer incorporates a highly precise thermal control sub-system and an extremely sensitive internal balancing arrangement. One or more gradiometers is employed in an inertially stabilized system so as to measure the desired components or combinations of components of the gravity gradient from a moving vehicle.
Application Number:
JP4457671A
Publication Date:
February 02, 1979
Filing Date:
June 22, 1971
Export Citation:
International Classes:
G01V7/10; (IPC1-7): G01V7/00
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