摘要
针对地磁辅助导航定位中基准图制备的需要,采用了建立区域地磁场模型的方法。分析了现有地磁场建模方法及各自的适用范围,选择泰勒多项式拟合法用于区域地磁场建模,对野值剔除原则进行了改进,对模型的验证方法进行了探讨。最后用泰勒多项式对某区域地磁场总强度F的数值进行了拟合,拟合结果表明区域地磁场模型的均方偏差远低于世界地磁场模型和局部地磁场模型。
The method of regional geomagnetic field modeling is adopted in order to prepare for the reference map of geomagnetism--aided navigation and positioning. The existing modeling methods and their appIicability are analyzed by comparison, and then poIynomial fitting is selected as the method for modeling of regional geomagnetic field. Furthermore, the value F （total intensity of geomagnetic field） of some area is fitted with Taylor polyno mial. In addition, the method of the elimination of abnormal values and the validation of the model are discussed. Fitting results indicate that the RMS of regional geomagnetic field is much lower than other models such as IGRF, WMM, and CGRF.
出处
《工程地球物理学报》
2008年第3期294-298,共5页
Chinese Journal of Engineering Geophysics
基金
国家自然科学基金项目(编号:60572061)
关键词
地磁场
建模
多项式
国际地磁参考场
世界磁场模型
中国地磁场模型
geomagnetic field
modeling
polynomial
international geomagnetic reference field （IGRF）
world magnetic model （WMM）
China geomagnetic reference field （CGRF）
