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中文摘要：
以中国东南沿海海域磁场为研究对象,以分辨率为3′×3′的国际地磁参考场数据作为背景场,采用最小二乘法拟合出海域的局部地磁场模型,反解出地磁场的最佳定位模型,并进行了仿真分析,由最终的仿真计算结果可以看出,在研究区域范围内,模型定位的纬度均方误差小于1.2nmile,经度定位均方误差小于4.8nmile.针对舰船使用的磁罗经调试时间长,误差补偿费用高的弊端,将磁场定位模型应用于磁罗经的磁差补偿.仿真结果表明,利用磁场本身的信息也可得到很理想的补偿效果.
英文摘要：
On the base of the analysis of geomagnetic maps of southeast China,the least square algorithm is used for modeling the local geomagnetism on 3′×3′IGRF2005（International Geomagnetic Reference Field）database.Then,the optimal positional model can be derived.The simulation has been done,from the simulation results we can see that the mean-squared error of the model in latitude and longitude are about 1.2nmile and 4.8nmile respectively.At last,according to the embarment of geomagnetic course system such as costing more time and money in calibration error,the partial geomagnetic field model is applied on the correcting the compass variation,The analysis of simulation result indicates that the accuracy has been significant improved.
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