基于克里金法的地磁数据插值研究

Research on Geomagnetic Data Interpolation Based on Kriging

地磁场在很多方面都有应用,特别是在目前地磁匹配导航逐渐成为新兴的水下载体导航手段背景下,地磁数据的测量与其插值方法的研究逐渐受到了学者们的关注。文章使用某海区的实测磁异常数据,首先等间隔的取大间距数据应用克里金等插值方法生成等值线图,然后与原始数据小间距的等值线图比较,说明插值方法的有效性。然后进一步改进克里金法,通过交叉验证方法说明克里金法在地磁数据的插值分析中是完全可行有效的。

The geomagnetic field has applications in many areas,especially in the current geomagnetic matching navigation becoming under the background of the emerging underwater vehicle navigation means,the geomagnetic data measuring and interpolation method increasingly scholars concern.The article uses a sea measured geomagnetic data,first,the contour map produced by equally spaced whichever is grater spacing data application kriging interpolation method.Then compared with the original small pitch contour map of the data,indicating the validity of the interpolation method.Finally,to further improve the algorithm by cross-validation analysis of geomagnetic data interpolation,kriging is entirely feasible and effective.