<論文>VLF-MT法による地下比抵抗構造探査

概要

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Characteristics of VLF-MT method have been described. Apparent resistivity and phase angle can be obtained from the observed electric and magnetic components of VLFwaves. This method utilizes the electric and the magnetic components perpendicularlyintersecting each other. The direction of an electric component of VLF signals is normallyset to that of the transmitter. It is a conventional way of measurement. In order to reveal the position of underground object it is desirable to set the magnetic component to the direction of target, that is, the electric component is perpendicular to the underground target. The angle between the direction of transmission station and that of the measurement line is permitted up to 50 degrees if we can correct the electric and magnetic components.I define a new parameter, the pointing vector, using apparent resistivity and phaseangle between electric and magnetic components. This parameter is effective to know the position of underground structure with a small range error.
秋田大学の論文