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|Title:||Superconducting gravity gradiometer for space and terrestrial applications||Author(s):||Chan, Anthony Hing Hung||Author(s):||Moody, M. V.
Paik, H. J.
|Issue Date:||1986||Publisher:||AIP Publishing||Journal:||Journal of Applied Physics||Volume:||60||Issue:||12||Start page:||4308||End page:||4315||Abstract:||
A three‐axis superconducting gravity gradiometer with a potential sensitivity better than 10−3 Eötvös Hz−1/2 is currently under development for applications in space. Although such a high sensitivity may be needed for only a limited number of terrestrial applications, superconductivity offers many extraordinary effects which can be used to obtain a gravity gradiometer with other characteristics necessary for operation in a hostile moving‐base environment. Utilizing a number of recently devised techniques which rely on certain properties of superconductors, we have produced a design for a sensitive yet rugged gravity gradiometer with a high degree of stability and a common‐mode rejection ratio greater than 109. With a base line of 0.11 m, a sensitivity of 0.1 Eötvös Hz−1/2 is expected in an environment monitored to a level of 10−2 m s−2 Hz−1/2 for linear vibration and 7×10−6 rad s−1 Hz−1/2 for angular vibration. A conventional stabilized platform can be used at this level. The intrinsic noise level, which is two orders of magnitude lower, could be achieved by monitoring the attitude with a superconducting angular accelerometer which is under development. In addition, the new gradiometer design has the versatility of adapting the instrument to different gravity biases by adjusting stored dc currents.
|URI:||https://repository.cihe.edu.hk/jspui/handle/cihe/1311||DOI:||10.1063/1.337474||CIHE Affiliated Publication:||No|
|Appears in Collections:||CIS Publication|
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