摘要
高精度小比例尺的地磁图的准确获取是实现高精度地磁导航的关键。本文论述了克里金插值理论能较好地描述地磁场的结构分量,为地磁场的构建提供了理论基础,并提出了一种基于克里金插值的局部地磁图的构建方法,采用交叉验证的方法将其与其他常用空间插值方法进行了精度评估。结果表明采用克里金插值方法构建的地磁图能够较为准确地反映局部地区地磁信息,为地磁导航技术研究提供了基准。
The positioning precision in geomagnetic navigation is affected by the accuracy and refinement of local geomagnetic map. It is discussed that the local geomagnetic field can be described by Kriging interpolation model. The step of geomagnetic field mapping using Kriging interpolation method is presented. Finally, several interpolation methods are evaluated by cross validation method in order to compare the relative quality of these interpolation methods. The results show that the geomagnetic map obtained by using Kriging interpolation method can precisely describe the real geomagnetic field and the method can be easily implemented.
出处
《电子测量技术》
2009年第4期122-125,共4页
Electronic Measurement Technology
关键词
地磁图构建
克里金插值
半方差函数
交叉验证
geomagnetic field mapping
kriging interpolation method
semivariance function
cross validation
