Extending GOCE Geopotential Model Using Wenzel’s Weighted
Spectral Combination
1 Xi’an Division of Surveying and Mapping, 36 Xiying Road,Xi’an 710054, China
Abstract Some combined GOCE and EGM08 geopotential models are established using Wenzel’s weighted spectral combination approach. Cumulative geoid errors show that combined models have better performance than the EGM08 model alone. Results of geoid differences at GPS/leveling benchmark in America indicate that a Dir4+EGM08 combined model has best performance amongst others, enhancing geoid precision up to 8% relative to EGM08 model.
Key words ：
geopotential model
spectral combination
GPS/leveling
GOCE
EGM08
time-wise approach
direct approach
Received: 06 June 2014
Published: 02 June 2015
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