利用SWARM星群磁测数据反演地球主磁场模型WHU-MM01  

The Inversion of the Earth’s Main Magnetic Field Model WHU-MM01 with SWARM Satellite Magnetic Data

作　　者：聂琳娟[1,2] 许智铭 NIE Linjuan;XU Zhiming(Department of Hydraulic Engineering,Hubei Water Resources Technical College,Wuhan 430070,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]湖北水利水电职业技术学院水利工程系,湖北武汉430070 [2]武汉大学测绘学院,湖北武汉430079

出　　处：《测绘地理信息》2020年第5期16-19,共4页Journal of Geomatics

基　　金：国家自然科学基金(41474018)。

摘　　要：利用地磁指数条件、地方时条件、粗差条件等筛选方法实现了SWARM卫星磁测数据的预处理与精化,基于各种相关的先验模型对主磁场成分实施有效分离,利用球谐分析方法建立了全球地球主磁场模型WHU-MM01。通过与国际主流的EMM2015(1~15阶)、IGRF12(1~13阶)和POMME10(1~15阶)地球主磁场模型进行对比分析,发现WHU-MM01模型与EMM2015、IGRF12和POMME10模型精度相当,量级互差为3~10 nT。This paper summarizes the basic processes and steps of data preprocessing and refinement of SWARM satellite magnetic data and analyzes the data pretreatment methods, such as geomagnetism index, local time, and gross error conditions. Then, it uses various related prior models to separate the components of the main magnetic field. The spherical harmonic analysis is followed to establish the global model of the main magnetic field, namely, WHU-MM01 model. The accuracy of the model by calculating the difference between the WHU-MM01 model value and the SWARM satellite observations is verified. After that, the comparison of the WHU-MM01 model with the latest international release of the EMM2015(1-15) model, IGRF12(1-13) model and POMME10(1-15) is made to show that the WHU-MM01 model is equivalent to the accuracy of the EMM2015, IGRF12 and POMME10 models, and the order of magnitude difference is 3~10 nT.

关 键 词：SWARM 地球主磁场 地壳磁场 磁层 电离层 国际地磁参考场 

分 类 号：P332[天文地球—水文科学] P228[水利工程—水文学及水资源]