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《Chinese Journal of Geophysics》 2006-03
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Numerical simulation of Earth's gravitational field recovery from SST based on the energy conservation principle

ZHENG Wei~1,SHAO Cheng-Gang~1,LUO Jun~(1*),HSU Houtse~21 Department of Physics,Huazhong University of Science and Technology,Wuhan 430074,China2 Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077,China  
Based on the measurement principle of Satellite-to-Satellite Tracking mission(SST),the new and effective observation equations of two satellites and three satellites are established,respectively using the energy conservation principle.The high-accuracy Earth's gravitational field up to degree and order 120 is recovered through numerical simulation by applying an improved pre-conditioned conjugate-gradient(PCCG) iterative approach.The simulated results show that the accuracy of the Earth's gravitational field recovery using two satellites is close to the results of EIGEN-GRACE02S publicized by Jet Propulsion Laboratory(JPL) in America,and the accuracy of the Earth's gravitational field recovery using three satellites is about 2 times higher than that using two satellites.
【Fund】: 国家自然科学基金项目(40174049和40234039)资助
【CateGory Index】: P223.0
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