为了提取地壳异常场，必须从观测资料中消除主磁场、磁层场，感应场和电离层场。
In order to get the crustal anomaly field, the main field, magnetospheric, ionospheric and induction fields from the Magsat data must be subtracted.
地球空间包括高层大气、电离层和磁层，是人类空间活动的最主要的区域。
The geospace, which includes the upper atmosphere, ionosphere and magnetosphere, is the most important region of human space activities.
对磁层-电离层电动耦合和电离层发电机两种效应进行了模式计算，并对所得的一些耦合现象作了综合讨论。
Model calculations are used to analyse fhe function of the magnetosphere-ionosphere electrodynamic coupling and that of the ionospheric tide-dynamo.
对磁层-电离层电动耦合和电离层发电机两种效应进行了模式计算，并对所得的一些耦合现象作了综合讨论。
Model calculations are used to analyse fhe function of the magnetosphere-ionosphere electrodynamic coupling and that of the ionospheric tide-dynamo.
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