The Spherical Harmonic Model of Gravity Field in Mainland China by Slepian Local Spectrum Method

doi:10.11947/j.AGCS.2017.20150542

Abstract

Abstract: For the purpose of calculating the gravity field model through spherical harmonic method only based on local measurements, it calculated that the measured gravity field data in mainland China by Slepian local spectrum method, and also it evaluated that the error effected by the non-uniformity of measured points by the known spherical harmonic model of GOCE satellite datasets. Firstly it calculated that the Slepian basis functions in mainland China and took the 72 order spherical harmonic model of GOCE satellite to evaluate the effective of the method in non-uniformity of measured points. Then, it recalculated that the gravity filed model by the Slepian localized spectral approach based on the resample points of Chinese mainland, and determined the gravity field variation model of Chinese mainland using the repeated gravity measure datasets from 2005 to 2008.

Key words: spatio-spectral concentration approach, Slepian function, mainland China, gravity variation, spherical harmonic function

CLC Number:

P223

CHEN Shi, XU Weimin, WANG Qianshen. The Spherical Harmonic Model of Gravity Field in Mainland China by Slepian Local Spectrum Method[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(8): 952-960.

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