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《Science of Surveying and Mapping》 2010-01
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Research progress in international gravity satellites and future satellite gravity measurement program in China

ZHENG Wei①②,XU Hou-ze①,ZHONG Min①,YUN Mei-juan③(①Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077,China;②Disaster Prevention Research Institute,Kyoto University,Uji,Kyoto 611-0011,Japan;③Department of Applied Physics,Wuhan University of Science and Technology,Wuhan 430081,China)  
In this paper,firstly,the research organizations,orbit parameters,key payloads,tracking modes,measuring principles,scientific objectives and technical features of the international special Earth's gravity measurement satellites such as CHAMP,GRACE launched and GOCE,GRACE Follow-On,special lunar gravity measurement satellite GRAIL to be launched are introduced.Secondly,the current requirements of related disciplines to the accuracy of Earth gravitational field are expatiated.Finally,the authors suggest that the satellite-to-satellite tracking in the high-low or low-low mode should be selected in the future satellite gravity measurement program.The quantitative and systematic research demonstration on optimal selection of orbit parameters should be developed and error analysis of gravity satellite system should be done as quickly as possible.The key payloads of gravity satellite according to matching accuracy indexes should be studied as rapidly as possible,and the virtual simulation of satellite gravity measurement system should be constructed as early as possible.
【Fund】: 中国科学院知识创新计划(kzcx2-yw-202);; 国家“863”计划(2006AA09Z153);; 国家自然科学基金(40674038 40674013)
【CateGory Index】: P223
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