In this Paper, the speciality of geomagnetic field, geomagnetic factors, geomagnetic map and hypothesis of formation cause of geomagnetic field have been simply introduced.
本文简单介绍了地磁场的特点，地磁要素和地磁图以及地磁埸成因的几种假说。
As one of the important components of the GAN, the geomagnetic map matching method (GMMM) is an important factor to effect the precision of the system positioning.
地磁图匹配算法作为地磁辅助惯性导航系统的重要组成部分，是影响系统定位精度的一个重要因素。
The method of regional geomagnetic field modeling is adopted in order to prepare for the reference map of geomagnetism-aided navigation and positioning.
针对性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。
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