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《Crustal Deformation and Earthquake》 2005-02
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UPWARD CONTINUATION OF GROUND GRAVITY SPACE-TIME CHANGE TO SATELLITE HEIGHT

Wang Dan+{1,2)}, Li Hui+{1,2)}, Shen Chongyang+{1,2)}, Fan Chunbo+{3)} and Yang Guangliang+{1,2)} 1) Institute of Seismology, CEA, Wuhan430071 2) Crustal Movement Laboratory, Wuhan430071 3) School of Geodesy and Geomatics, Wuhan University, Wuhan430071  
In order to study the detection ability of a satellite at different height to ground gravity change and according to space analytic continuation principle, this paper makes an upward continuation of the ground gravity change to the height of several hundred km. The result shows that if there is gravity change of 93×10+{-8}ms+{-2} on the ground, a change of 20×10+{-8}ms+{-2} can be observed at the height of 450 km, so the observation accuracy should less than 20×10+{-8}ms+{-2} when monitoring seismicity by satellite gravity observing technology.
【Fund】: “863”课题:中国地震科学卫星计划的预研与制定(2003AA134060)
【CateGory Index】: P223
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