TIME DOMAIN LEAST SQUARES METHOD FOR RECOVERING EARTH’S GRAVITY FIELD BY SATELLITE GRAVITY GRADIENT
Zou Zhengbo 1,2) ;Luo Zhicai 3,4) ;Xing Lelin 1,2) ;Wu Yunlong 3) ; and Li Hui 1,2)
1)Institute of Seismology,CEA,Wuhan 4300712)Crustal Movement Laboratory,Wuhan 4300713)School of Geodesy and Geomatics,Wuhan University,Wuhan 4300794)Geomatics and Apllications Laboratory，Liaoning Technical University,Fuxin 123000
Abstract：Since the attenuation of the gravitaty field with altitude increasing can be sufficiently compensated by satellite gravity gradiometry, it is possible to recover earth’s gravity field with higher precision. On the basis of the satellite orbit perturbation theory, the error of gravity field model from satellite gravity gradiometry mission is analyzed with the timewise least square method. And the effects of gravity field on the accuracy are presented in maps，due to the choice of SGG parameters (such as satellite’s altitude，sampling rates，inclination of satellite and accuracy of gradiometery).The results indicate that time domain leastsquare method is suitable for the error analysis and the mission design of the measurement of satellite gravity gradiometery.
Zou Zhengbo,Luo Zhicai,Xing Lelin et al. TIME DOMAIN LEAST SQUARES METHOD FOR RECOVERING EARTH’S GRAVITY FIELD BY SATELLITE GRAVITY GRADIENT[J]. jgg, 2007, 27(3): 44-49.
