Journal of University of Chinese Academy of Sciences >
Evaluation of earth gravitational models based on classic geoid definition
Received date: 2016-01-25
Revised date: 2016-03-20
Online published: 2016-07-15
We propose an evaluation approach of earth gravitational models (EGMs) based on Gauss-Listing classic geoid definition.The classic geoid is defined as an equigeopotential surface.Using this character, we select a gravity geoid as reference surface, calculate the gravity potentials of different EGMs on the reference surface, and establish an index of gravity potential dispersion to evaluate EGMs.Using this approach we evaluate theoretical compliance abilities of different EGMs and of an EGM applied in different areas in the earth.The results show that the precision of EGM96 is higher than that of OSU91, and EGM2008 and EIGEN-6C4 have similar precisions.The results are consistent with the existing research conclusions.The results further declare that the precision of EGM2008 is slightly higher than that of EIGEN-6C4 in the cm level.
DING Jian , XU Houze , ZHANG Chuanyin . Evaluation of earth gravitational models based on classic geoid definition[J]. Journal of University of Chinese Academy of Sciences, 2016 , 33(4) : 528 -536 . DOI: 10.7523/j.issn.2095-6134.2016.04.014
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