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Superconducting tensor gravity gradiometerThe employment of superconductivity and other material properties at cryogenic temperatures to fabricate sensitive, low-drift, gravity gradiometer is described. The device yields a reduction of noise of four orders of magnitude over room temperature gradiometers, and direct summation and subtraction of signals from accelerometers in varying orientations are possible with superconducting circuitry. Additional circuits permit determination of the linear and angular acceleration vectors independent of the measurement of the gravity gradient tensor. A dewar flask capable of maintaining helium in a liquid state for a year's duration is under development by NASA, and a superconducting tensor gravity gradiometer for the NASA Geodynamics Program is intended for a LEO polar trajectory to measure the harmonic expansion coefficients of the earth's gravity field up to order 300.
Document ID
19820039510
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Paik, H. J.
(Maryland, University College Park, MD, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Instrumentation And Photography
Accession Number
82A23045
Funding Number(s)
CONTRACT_GRANT: NAS8-33822
Distribution Limits
Public
Copyright
Other

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