Superconducting Gravity Gradiometers (SGGs)
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چکیده
Three models of SGGs with increasing complexity and sensitivity have been developed at Maryland [Chan et al., 1987; Moody et al., 2002]. The Model II SGG has reached an operating sensitivity of 0.02 E Hz (1 E ≡ 1 Eötvös ≡ 10 s), three orders of magnitude improvement over the sensitivity achieved by room-temperature gradiometers. With such vastly improved sensitivity, the SGG finds useful application in geophysical measurements, oil and mineral prospecting, and inertial navigation. The great potential for practical application has inspired several groups around the world to develop similar instruments. At Maryland, a new SGG with improved linear acceleration rejection capability is under development.
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