A STUDY OF SOURCE FIELD ABOUT PETRO-SONDE METHOD
Rong Liu · Chinese Journal of Geophysics · 1993
In this paper, the characteristic of the matiral electromagnetic field from lightning and from solar wind iis discussed when the sourse fild is considered. The studies author has performed show that (1) the resolution power (distinguishability) of using TE field to stratum subsurface decreases but TM field increases wh n source field is considered, (2) the natural field or atmospherics of wave-guides has a non-uniform field effect and (3) because of the cut-off frequency of TM1 mode, according to theory analysis such situation leads to the concept of high resolution power window to stratum subsurface. Author suggest that the source field PS method utilizes originates from lightning discharges (or atmospherics) and is not from solar wind, and that PS technology makes use of the speciality of the waveguide of the atmospherics.