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Once
the sensor orientation is decided, locate four points
are located approximately(usually) 50m from the site center
for Ex(close to N-S) and Ey(close to E-W) telluric dipoles. |
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The
electrodes should be placed in 15-20cm deep holes for
stable and good contact. It is recommended to use bentonite
at the bottom of the hole. |
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2D Resistivity
model |
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Next,
locations for are selected magnetic sensors, apart from
the telluric lines to minimize interference between sensors.
And also away from trees(watch roots too) to avoid noise
due to ground vibration by wind. Bury the sensor coils
in the ground to minimize noise from movement and temperature
variation. Hx and Hy should be placed horizontally and
Hz vertically. |
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