MF7磁异常场模型的建模与匹配性能分析  

Modeling of magnetic anomaly and Analysis about performance of geomagnetic matching of MF7

作　　者：郑玉航[1] 刘元元 张金生[1] 王仕成[1] 乔玉坤[1] 

机构地区：[1]第二炮兵工程大学精确制导与仿真实验室,西安710025

出　　处：《地球物理学进展》2013年第5期2256-2263,共8页Progress in Geophysics

基　　金：国家自然科学基金(60874093;60904083;61004128)资助

摘　　要：MF7模型是用来描述地球磁异常场的模型.针对MF7模型在地磁匹配中应用的可行性进行了详细论证.通过分析MF7磁异常场模型的建模原理和建模过程,引入了新的球谐函数,将普通的加法运算转化为乘法运算,并在Matlab软件下实现了数值计算和磁异常场的可视化,为计算和仿真提供了数据的支撑;利用建立的MF7模型,根据设定的仿真条件对磁异常场数据的适配性和匹配性进行了计算和仿真.结果表明,最终建立的MF7模型是正确的,可以提供高精度的数据和满足了磁异常场的可视化要求;由其提供的数据和基准图,在特定范围、噪声较小的区域可以实现精确匹配,并且可以为地磁匹配基准图的制备提供数据来源和扩展途径,从而提高地磁导航性能.The seventh generation Earth Magnetic Anomaly model is described Earth Magnetic Anomaly. The report particularly demonstrates feasibility of MF7 for Geomagnetic Matching Navigation. To analyse modeling theory and process of MF7, a new spherical harmonic function that can make ordinary addition operation translate multiplication operation is introduced. Numerical value calculation and videotext of magnetic anomaly model are achieved in Matlab software. It can provide support of data to calculation and simulation. In simulation condition, making use of MF7 analyse matching performance about data of magnetic anomaly. Simulation results show that ultima MF7 is correct and can provide high precision data and suffice videotext of magnetic anomaly mode. Its data and basal graph can achieve upper precision at a certain area with less yawp and provide making of basal graph and getparms data to Geomagnetic Matching Navigation for improving performance of geomagnetic matching.

关 键 词：MF7模型 磁异常场 地磁图 地磁匹配 

分 类 号：P318[天文地球—固体地球物理学]