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Determination of geoid by GPS/Gravity data

LI Fei 1,2 ,YUE Jian-Li 1, ZHANG Li-Ming 2,3 1 School of Geodesy and Geomatics of Wuhan University, Wuhan 430072, China 2 Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China 3 Graduate School of the Chinese Academy of Sciences, Beijing 100049, China  
As an application and test of GPS/Gravity boundary value problem, a local geoid located on N area is determined, by using 702 GPS/Gravity data for calculation and 52 GPS/Leveling for matching and checking. The accuracy analyses by matching with GPS/Leveling data and by direct correction to system difference show that the determination of local geoid computed by GPS/Gravity data and method of GPS/Gravity BVP achieved centimeter accuracy.
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