Hunan 2017 GNSS Gravity Quasi-Geoid Model and Its Precision Analysis
Abstract Using nearly 70 000 gravity observation data, SRTM topographic data and GNSS/leveling control points data from Hunan and nearby districts, the EIGEN-6C4 global gravity fields model is taken to be the reference gravity field. And the Stokes-Helmert approach and spherical cap harmonic analysis are conducted to construct the 2′×2′ resolution Hunan GNSS gravity geoid model(HNGG2017). The precision test shows that the external error range is ±0.022 m. Compared to the historic model, the error of the new model in north areas such as Changde Hanshou and southwest areas such as Yongzhou Jiangyong are significantly reduced.
Key words :
quasi-geoid
global positioning system
leveling measurement
gravity
precision analysis
Cite this article:
DONG Mingxu,LI Jiancheng,HUA Liangchun et al. Hunan 2017 GNSS Gravity Quasi-Geoid Model and Its Precision Analysis[J]. jgg, 2019, 39(1): 66-71.
DONG Mingxu,LI Jiancheng,HUA Liangchun et al. Hunan 2017 GNSS Gravity Quasi-Geoid Model and Its Precision Analysis[J]. jgg, 2019, 39(1): 66-71.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2019/V39/I1/66
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