Subtract electromagnetic wave transmitter is used well in the item of the electromagnetic wave observation investigation.
电磁波发射机在电磁波观测系统研究项目中起了很好的作用。
This paper reported the situations of developing electromagnetic wave observation before earthquakes in Xiamen city and the explorations on recognizing varieties of non-earthquake signals.
本文记述了厦门市地震局几年来开展电磁波观测的情况，以及对各种非震异常信号的识别探索。
An analysis for the observation data of the electromagnetic wave of Puyang City was made, the anomalous characters were summarized.
对河南省濮阳市地震台电磁波的观测资料进行了研究，总结了其异常变化特征。
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