Shallow subsurface explorations requires substantial and efficient geophysical methods. Among the geoelectrical techniques are the passive EM methods which use existing radio transmitters as the signal source. Consequently they can be set up very compactly, thus being versatile. Compared to the radiomagnetotelluric method (RMT), the weIl known VLF method is a contactless one, so that a high progress in measurement can be achieved. The Z/H method is a further development of the VLF method by using a wide frequency range, thus giving the possibility of avertical sounding. The aims of the present work are as follows: • calculating the magnetic transfer functions in radio frequency range • increasing the frequency range to 10kHz up to 2000 kHz.


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