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木星磁场及磁场模型的对比分析
费涛, 方美华, 朱基聪, 田鹏宇
南京航空航天大学 航天学院, 南京 210016
摘要:
木星具有太阳系最强的行星磁场,是木星探测面临的基本环境。首先对磁场环境及其数学模型进行了调研,并在研究木星磁场模型以及磁场的数学原理的基础上,使用MATLAB数学工具实现了木星主磁场的计算,对VIP4、VIT4、O6和V1_17ev(eigenvector,特征向量)4个模型与磁测数据进行了对比及分析。研究结果表明这4个模型计算得到的磁场强度范围较为一致,但在全球磁场分布上存在差异,尤其是对磁南极位置的识别上,4个模型的结果都不相同;在对模型计算结果与探测数据的探讨分析中,发现4个模型与探测数据的符合较为一致,偏差均较小。可为木星探测的环境保障提供必要的理论基础和计算模型支撑。
关键词:  木星磁场;磁场数学模型;磁场分布;模型精度
DOI:10.15982/j.issn.2095-7777.2019.02.006
分类号:P353
基金项目:上海航天科技创新基金资助项目(SAST2016109);国家自然科学基金青年基金资助项目(11405085)
Comparative Analysis of Jupiter Magnetic Field and Magnetic Field Model
FEI Tao, FANG Meihua, ZHU Jicong, TIAN Pengyu
College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Abstract:
Jupiter has the strongest magnetic field among the planet in the Solar system. In this paper,Jovian magnetic field and its'models including VIP4, VIT4, O6 and V1 was investigated. And then the calculated magnetic field results by these models were compared. It was found the range of magnetic filed strength by these four models were consistent. While global magnetic field distribution were not exactly the same,especially the position of magnetic south poles. The deviation were small between the models and magnetic data obtained from spacecraft missions. It can provide necessary theoretical basis and computational model support for environmental protection of Jupiter exploration. VIP4,VIT4,O6 and V1 was investigated. And then the calculated magnetic field results by these models were compared. It was found the range of magnetic filed strength by these four models were consistent. While global magnetic field distribution were not exactly the same,especially the position of magnetic south poles. The deviation were small between the models and magnetic data obtained from spacecraft missions. It can provide necessary theoretical basis and computational model support for environmental protection of Jupiter exploration.
Key words:  Jupiter magnetic field;magnetic field mathematical model;magnetic field distribution;model precision