在电磁能量的返回方式，测量对象与探测结果的表示形式方面，与典型大地电磁法进行了比较。
Ther are some differences in the returnable behaviour of electromagnetic energy, the measuring objectivs and the expression of the detecting results when compared with the MT method.
相对于陆上同类测量而言，海底大地电磁探测成本高，作业难度大，且不易实施数据采集的重复观测。
Compared with continental operation, there are higher risk and expenses in detecting and more difficult in acquisition repeatedly on the marine magnetotellurics.
介绍了两种大地电磁阻抗测量方法，即变频法与DFT分析法。
Two methods of the magnetotelluric impedance measurement are provided in this paper. That is, frequency conversion and DFT.
海底大地电磁仪为满足上述要求，其内部配备了高精度时钟源、姿态检测器件以及与海底电磁信息采集相关的自动信号测量与存储电路。
In order to solve the problems above, the high-precision clock, detecting posture device and automatic measurement circuit are equipped in Marine magnetotelluric instrument.
海底大地电磁仪为满足上述要求，其内部配备了高精度时钟源、姿态检测器件以及与海底电磁信息采集相关的自动信号测量与存储电路。
In order to solve the problems above, the high-precision clock, detecting posture device and automatic measurement circuit are equipped in Marine magnetotelluric instrument.
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