STUDY ON RECOVERING EARTH’S GRAVITY FIELD WITH
GOCE’S SST-HL DATA
1)Xi’an Research Institute of Surveying and Mapping,Xi’an 710054
2)State Key Laboratory of GeoInformation Engineering,Xi’an 710054
3)Key Laboratory of Geospace Environment and Geodesy of Ministry of Education,
Wuhan University,Wuhan 430079
4)Institute of Geospatial Information,Information Engineering University,Zhengzhou 450052
Abstract:A practical mathematic model was established based on the least squares method and spherical harmonic analysis method for solving the EGM from disturbing potential data.The results show that there are some influences on the EGM results when the observation data are in different data quantity and sampling rate.The precisions of the EGMs recovered with different resolutions are different between each others.The result recovered with the spherical harmonic analysis method is better than that with the least squares method.