magnetic diurnal variation

基本解释

There is a "magnetic noon anomaly" of the diurnal variation.
日变化存在“磁中午异常”现象；
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The paper presents some results of model simulation of magnetic diurnal variation for determining susceptibility.
本文主要介绍利用模型实验方法验证磁日变法确定磁性体磁化率值理论的一些结果；
The selection of base value is critical to the geomagnetic diurnal variation correction in marine magnetic survey.
地磁日变基值的选取是海洋磁力测量地磁日变改正的重要内容。