| 利用IGRF模型计算全张量地磁梯度 | 
| 钟炀, 管彦武, 石甲强, 肖锋 | 
| The calculation method of full tensor geomagnetic gradient based on IGRF model | 
| Yang ZHONG, Yan-Wu GUAN, Jia-Qiang SHI, Feng XIAO | 
| 图4 地磁场三分量(a)Bx(b)By(c)Bz等值线 | 
| Fig.4 Three-component contour map of the geomagnetic field | 
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