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What: |
Possible Future Satellite Gradiometry Mission After GOCE |
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Who: |
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( Department of Physics, University of Marylan，College Park, Maryland, USA) |
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When: |
Monday morning, May 24th, 10:30 a.m |
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Where: |
Room 327, Office Block, 2 West Beijing Road (PMO, CAS) |
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Welcome to attend |
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( PMO Academic committee & academic circulating committee) |
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abstract
Sensitive superconducting accelerometers and gravity gradiometers have been developed for tests of laws of gravity, searches for new forces and particles, and gravity survey. These devices utilize benign properties of superconductors, as well as the enhanced mechanical stability of materials at cryogenic temperatures. By differencing the responses of two linear accelerometers in a superconducting circuit, a gravity gradiometer, which is immune to platform vibrations, has been constructed. The 4-K space cyrocoolers under development and near flight test can reduce the liquid helium payload to meet the stringent mass requirement of a low Earth orbiting satellite. With these two technologies combined, a possible future gravity gradiometry mission can improve the gravity sensitivity by two to three orders of magnitude over GOCE.
