Geodesy and mine survey
Year: 
2017
Tom: 
22
#: 
1
37
Pages: 
30-49
Abstract:
On the basis of global models of the gravitational field of the Earth such as EIGEN-6C, EIGEN-6C3stat, GO_CONS_GCF_2_TIM_R5 and EIGEN-6C4, which are presented on the website of the German Research Centre for Geosciences (ICGEM) in the form of harmonic coefficients of the geopotential are constructed global quasigeoid models.For accuracy evaluation of the modern global quasigeoid models we performed a comparison of heights anomalies which are obtained from quasigeoid models, with heights which are obtained from the geometric leveling and GNSS measurements for the territories of two different Russian regions.We have carried out a comparison of quasigeoid heights calculated over investigated models and quasigeoid heights obtained according by the model EGM-2008. The paper presents degree dispersion of quasigeoid heights and their errors. Research of the high degree model EIGEN-6C4 showed improved spatial permission ability and accuracy quasigeoid heights in the study area relatively of the model data EGM-2008 on 5 percents.
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