星间距离影响GRACE地球重力场精度研究.pdfVIP

312 Vol. 31No. 2 2 0 1 1 4 JOURNAL OF GEODESY AND GEODYNAM ICS Apr. , 2011 : 1671 942( 2011) * GRACE 1, 2) 1) 1) 3) 4) 郑 伟 许厚泽 钟 敏 员美娟 周旭华 1), 430077 2), 611- 0011 3), 430081 4), 200030 , 120 GRACE: , GRACE(L 20) , ( 110 ~ 330 km ), 20, 110 km 0. 0 2 cm, 220 km 330 km 1. 1 6 1. 209, ( 100 L 120) , 120 , 110 km 13. 0 2 cm, 220 km 330 km 1. 327 1. 970, 220 0 km GRACE; ; ; ; : P223 : A DEMONSTRATED STUDY ON INFLUENCES OF INTERSATELLITE RANGE ON ACCURACY OF GRACE EARTH ! S GRAVITATIONAL FIELD 1, 2) 1) 1) 3) 4) ZhengW ei , Xu Houze , Zhong M in , Yun M eijuan and Zhou Xuhua 1)K ey Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, CAS, Wuhan 430077 2)D isasterPrevention Research Institute, Kyoto niversity, j,i Kyoto 611- 0011, Japan 3)Departmentof App lied Physics, Wuhan niversity of Science and Technology, Wuhan 430081 4)ShanghaiA stronom ical Observatory, CAS, Shanghai 200030 Abstract The GRACE Earth! s gravitational field comp lete up to degree and order 120 is recovered using the mi proved energy conservation principle and on the basis of d ifferent intersatellite ranges. The smi ulative results are as follow s: F irstly, based on the sam e accuracy indexes of GRACE key payloads, wh ile recovering the longw ave length Earth! s gravitational field (L 20), w ith the increase of intersatellite ranges ( 110 ~ 330 km ) little by lit tle, cumulative geoid height e