地磁测量数据野值的辨识与剔除  

Identification and Elimination of Outliers in Geomagnetic Measurement Data

作　　者：李安梁[1] 郭才发[1] 蔡洪[1] 

机构地区：[1]国防科技大学航天与材料工程学院

出　　处：《飞行器测控学报》2011年第2期89-94,共6页Journal of Spacecraft TT&C Technology

摘　　要：针对地磁测量野值的辨识与剔除方法进行了深入研究。分析了野值辨识与剔除的基本原理,基于孤立型野值和斑点型野值模型分析比较了不同的野值剔除方法。利用地磁场实测信息,优化了野值剔除方法的参数,并从不同角度验证了方法的野值修复效果。仿真结果表明,在观测信息为总强度地磁信息条件下,优化的最小二乘B样条逼近法能够有效地辨识野值,具有较好的野值修复效果。The methods for identification and elimination of outliers in geomagnetic measurement data are discussed and the theory of identification and elimination of outliers is analyzed.Based on isolated outlier and spotted outlier models,different methods of outlier identification and elimination are compared.Using experiment data of geomagnetic field,outlier repairing effect of the methods is validated with optimized parameters.The results show that least square B-spline approximation identifies outliers more efficiently and provides better outlier repair effect provided geomagnetism intensity is observed.

关 键 词：地磁导航 孤立型野值 斑点型野值 最小二乘B样条逼近法 

分 类 号：P318.63[天文地球—固体地球物理学] V557[天文地球—地球物理学]