大地测量与地球动力学2026，Vol.46Issue(1)：48-54,7.DOI:10.14075/j.jgg.2025.02.034
基于SRBF法确定似大地水准面的数值分析
Numerical Analysis of Gravimetric Quasi-Geoid Determination Based on SRBF Method
孟静娟 1赵辉 1王文超 1耿晓燕 1陈俊英1
作者信息
- 1. 自然资源部大地测量数据处理中心,西安,710054
- 折叠
摘要
Abstract
This paper employs the spherical radial basis function(SRBF)method to integrate terrestri-al gravity and airborne gravity data for the computation of the gravity quasi-geoid.Experiments are conducted from aspects such as terrain effects,model order,and basis function parameters to investi-gate the impact and variation patterns of different parameters.The results show that:1)The burial depth,effective distance,and expansion order of the basis function all affect the quality of the quasi-geoid refined by the SRBF method.The precision difference of the geoidal height anomalies corre-sponding to different parameter settings can reach up to 2.4 cm;2)Considering the terrain effects when calculating residual gravity data can improve the final quasi-geoid precision by 21.6％;3)Using two sets of GNSS/leveling points with different precisions and distributions for external validation of the quasi-geoid results,the best validation precision differs by 4.3 cm;4)In mountainous areas,by optimizing parameters to integrate terrestrial and airborne data,the optimal precision of the quasi-ge-oid result can reach 2.7 cm.关键词
球面径向基函数/航空重力/地面重力/GNSS/水准/局部重力场Key words
spherical radial basis function/airborne gravity/terrestrial gravity/GNSS/leveling/re-gional gravity field分类
天文与地球科学引用本文复制引用
孟静娟,赵辉,王文超,耿晓燕,陈俊英..基于SRBF法确定似大地水准面的数值分析[J].大地测量与地球动力学,2026,46(1):48-54,7.
