【摘要】 随着卫星探测近地空间地磁场数据的丰富,出现了多种卫星地磁场模型。本文研究了现有主要卫星地磁场模型的结构特点和应用范围,针对地磁场模型高斯系数阶数与场源成分的相关性,引入Mauersberger-Lowes谱分析的方法研究了最新的POMME-8、MF7和NGDC-720系列模型,得出POMME-8适用于地核主磁场建模,MF7适用于地壳场,NGDC-720适用于高阶地壳场的结论。最后用POMME-8(1-16阶)、MF7(16-120阶)和NGDC-720(120-720阶)模型构建了新的综合模型EMM720,并和已经发布的EMM2010模型共同与地面台站观测值进行了比较验证,结果表明EMM720与EMM2010精度相当,并在F和Y分量上略有提高。更多还原

【Abstract】 With the development of satellite exploring the near-earth space,more geomagnetic data achieved and more geomagnetic field model appeared. Aimed at the relationship between the order of Gauss coefficient and the source of geomagnetic field model,characteristics of structure and applications of environment were researched in this paper. The new method that Mauersberger-lowes spectrum is introduced to research geomagnetic field models,as POMME-8,MF7 and NGDC-720.The results show that POMME-8 is suitable for main magnetic field modeling,MF7 for crustal magnetic field,NGDC-720 for high degree of curstal. The new model named EMM720 is built in POMME-8( 1-16 order),MF7( 16-120 order) and NGDC-720( 120-720 order). Then the values among EMM720,EMM2010 and the ground station,which shows that the accuracy is similar,and EMM720 is better in F and Y components.更多还原