ON GRAVITY REDUCTION
Li Zhiyuan 1) ; Xing Lelin 1,2) ; Xiao Liangming 3) ; and Jiang Shenghua 4)
1)School of Geodesy and Geomatics of Wuhan Universtiy, Wuhan 4300792)Institute of Seismology, CEA, Wuhan 4300713)Municipal Bureau of Land and Resources of Jingtan,Jingtan 2130004)Wuhan Geotechnical Engineering and Surveying Institute,Wuhan 430022
Abstract In this paper we have explained the physical mechanism of gravity reduction in the view of constructing the reference earth model. Through the comparison of different models, the conclusion can be drawn that the inhomogeneous of mass distribution of earth interior should be taken into account and the accuracy
of lateral density should reach 0.001 g/cm 3 when determining a cmlevel geoid.
Key words ：
gravity reduction
geoid
reference earth model
lateral density variations
earth gravity field
Received: 01 January 1900
Corresponding Authors:
Li Zhiyuan
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