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《Progress in Geophysics》 2014-01
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Precision evaluation and analysis of least squares collocation method and spherical harmonic analysis method in the determination of the Earth's gravity field model

LIU Xiao-gang;YAN Zhi-chuang;SUN Wen;ZHOU Rui;Xi'an Research Institute of Surveying and Mapping;State Key Laboratory of Geo-Information Engineering;Key laboratory of Geo-space Environment and Geodesy of Ministry of Education,Wuhan University;Institute of Geospatial Information,Information Engineering University;  
Fundamental formulae of least squares collocation(LSC) method and spherical harmonic analysis method to recover the Earth ' s gravity field model(EGM) from T_(zz)component of satellite gravity gradients(SGG) are deduced,the precisions of these two methods in the determination of the EGM are compared by numerical experiments,and the advantage and disadvantage of these two methods in the recovery of the EGM are summarized and reviewed at last.
【Fund】: 国家自然科学基金资助项目(41304022 41174026 41104047);; 国家973资助项目(61322201 2013CB733303);; 地球空间环境和大地测量教育部重点实验室开放基金资助项目(11-01-03)联合资助
【CateGory Index】: P312.1
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