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《Journal of Astronautics》 2011-03
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Demonstration on Different Matching Relationship of Accuracy Indexes of Key Payloads in the Satellite-to-Satellite Tracking Mode

ZHENG Wei1,2,XU Hou-ze1,ZHONG Min1,YUN Mei-juan3 (1.Key Laboratory of Dynamic Geodesy,Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077,China; 2.Disaster Prevention Research Institute,Kyoto University,Uji,Kyoto 611-0011,Japan; 3.Department of Applied Physics,Wuhan University of Science and Technology,Wuhan 430081,China)  
The different matching relationships of accuracy indexes from GRACE on-board K-band ranging system,GPS receiver and SuperSTAR accelerometer are demonstrated systematically based on an improved energy conservation principle.The simulated results show:Firstly,accuracy indexes of GRACE key payloads display linear matching relationship;Secondly,due to the representation of characteristics of cumulative variation in dissipative energy,the contribution of accelerometer errors to the Earth's gravitational field is different from other key payloads;Thirdly,taking 1~10μm/s of accuracy indexes from K-band ranging system as a standard associated with accuracy indexes of other key payloads,cumulative geoid height errors are 17.6~174.8cm and 1.5°×1.5° cumulative gravity anomaly errors come to 0.3~2.8mGal at degree 120,which preferably agree with EIGEN-GRACE02S published by GFZ in Germany when accuracy indexes of K-band ranging system is 1μm/s;Lastly,it is proposed that optimal accuracy indexes of key payloads are designed as 1~3μm/s of intersatellite range-rate,3~10cm of orbital position,0.03~0.10mm/s of orbital velocity and 0.3~1.0 nm/s2 of nonconservative force in the future satellite-to-satellite tracking mode in China.This study will provide theoretical foundation and calculational guarantee for accurate and rapid determination of global gravitational field in the lunar gravity exploration program GRAIL and planetary exploration missions(e.g.Mars) in the solar system in future.
【Fund】: 中科院知识创新工程青年人才重要方向项目(KZCX2-EW-QN114);; 国家自然科学青年基金(41004006);; 湖北省自然科学基金(2010CDB05301)
【CateGory Index】: P223
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