Effect of different inter-satellite range on measurement precision of Earth’s gravitational field from GRACE

作     者：Zheng Wei Hsu Houtse Zhong Min Yun Meijuan Zhou Xuhua 

作者机构：State Key Laboratory of Geodesy and Earth＇ s Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China Disaster Prevention Research Institute Kyoto University Uji Kyoto 611-001l Japan Department of Applied Physics Wuhan University of Science and Technology Wuhan 430081 China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2012年第3卷第1期

页      面：44-51页

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 07[理学] 08[工学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences for Distinguished Young Scholar(KZCX2-EW-QN114) the National Natural Science Foundation of China(41004006,41131067,11173049) the Merit-based Scientific Research Foundation of the State Ministry of Human Resources and Social Security of China for Returned Overseas Chinese Scholars(2011) the Open Research Fund Program of the Key Laboratory of Geo-Informatics of State Bureau of Surveying and Mapping(201031) the Open Research Fund Program of the Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences(2011-04) the Frontier Field Program of Knowledge Innovation of Institute of Geodesy and Geophysics of Chinese Academy of Sciences the Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(PLN1113) the Hubei Province Key Laboratory of Refractories and Ceramics Ministry-Province jointly-Constructed Cultivation Base for State key Laboratory(G201009) 

主　　题：GRACE inter-satellite range colored noise Earth' s gravitational field energy conservation principle 

摘      要：The precision of Earth＇s gravitational field from GRACE up to degree and order 120 was studied for different inter-satellite ranges using the improved energy conservation principle. Our simulated result shows that： For long wavelength （L≤20） at degree 20, the cumulative geoid-height error gradually decreased with increasing range, from 0. 052 cm for 110 km to 1. 156 times and 1. 209 times as large for 220 km and 330 kin, respectively. For medium-wavelength （ 100 ≤ L ≤ 120） at degree 120, the cumulative geoid-height error de- creased from 13. 052 cm for 110 km, to 1. 327 times and 1. 970 times as large for the ranges of 220 km and 330 km, respectively; By adopting an optimal range of 220 ± 50 km, we can suppress considerably the loss of precision in the measurement of the Earth＇ s long-wavelength and medium-wavelength gravitational field.