基于径向基函数的区域地磁场边界插值约束  

Boundary Interpolation Constraint of Geomagnetic Field Based on Radial Basis Functions

作　　者：谭斌[1] 林春生[1] 

机构地区：[1]海军工程大学兵器工程系,武汉430033

出　　处：《工程地球物理学报》2010年第6期651-655,共5页Chinese Journal of Engineering Geophysics

基　　金：国防重点实验室基金项目(编号:51444060101JB1108)资助

摘　　要：针对区域地磁场模型存在的边界效应问题,采用基于径向基函数的插值方法,对缺少测量点的边界区域进行插值约束。在某海区地磁场建模仿真试验中,利用该方法结合有限区域的地磁观测数据,得到了边界区域地磁场的插值结果,并建立了海区地磁场模型。建模结果表明,该方法较补充国际地磁参考场值的方法,具有更高的分辨率和更小的均方偏差,为提高模型精度、改善边界效应提供了有效途径。According to the boundary effect of regional geomagnetic field model,we interpolate geomagnetic field values on non-sampled boundary regions with RBF（radial basis functions） in this paper.In sea area geomagnetic field modeling simulation,this algorithm and the limited area geomagnetic field survey data were used to interpolate the boundary area geomagnetic field and set up the sea area geomagnetic field model.The result of modeling shows that the RBF interpolation algorithm has better performance in decreasing RMS value of geomagnetic field model and increasing model precision comparing with traditional method of appending the IGRF data to the boundary region.Thus it is available method for meliorating the boundary effect and improving the truncation order of regional geomagnetic field model.

关 键 词：径向基函数 区域地磁场模型 边界效应 插值 

分 类 号：P631.3[天文地球—地质矿产勘探]