Laboratory Demonstrations of Superconducting Gravity and Inertial Sensors for Space and Airborne Gravity Measurements
Significant improvements of the present gravity field models of the Earth are required to advance various branches of solid-Earth geophysics and oceanography (McNutt and Flinn, 1987). A powerful method of acquiring high-resolution global gravity data is remote sensing by means of an orbiting gravity gradiometer (Paik et al, 1988). In order to recover the gravity field to the required precision of 2 to 3 mGals with a resolution of 50 km from an altitude of 200 km, a gradiometer sensitivity of 3 × 10−4 E Hz−1/2 (1 E ≡ 10−9 s−2) is needed. Such a sensitivity represents improvement by five orders of magnitude from the sensitivity achieved in a room-temperature gravity gradiometer (Wells, 1983), and requires an unconventional approach to the sensor design and platform control.
KeywordsAngular Acceleration Proof Mass Levitation Force Gravity Survey Persistent Current
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