Syncretic Processing of GOCE Satellite's SST and SGG Data Based on Spectral Combination Method
Abstract：Syncretic processing of various types of gravimetric data is one of the challenging and hot issues in the modeling of Earth's gravitational field model (EGM).The general expressions of the spectral weight and spectral combination of the united-processing of various types of gravimetric data are presented in this paper.What's more, the detailed expressions of spectral combination formulae and the corresponding spectral weights in the EGM determination using satellite-to-satellite tracking (SST) data and satellite gravity gradient (SGG) data of GOCE satellite are derived, based on spherical harmonic analysis method.Experimentation results show that the EGM computed by SGG data is improved by SST data in the low order, whatever the data are simulated or surveyed.It is concluded that as many types of gravimetric data as possible should be combined together in the data processing in order to improve the quality and reliability with widening scope and to improve the precision and spatial resolution of the computational results.
Keywords：Earth's gravitational field model(EGM)spectral combination methodspherical harmonic analysissatellite-to-satellite tracking(SST)satellite gravity gradient(SGG)geophysics
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 471-478 )