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6 主对角线上3个张量分量之和等值线
Fig.6 Contour map of the sum of the three tensor components on the main diagonal