Method and apparatus for surveying terrain resistivity

Details Method and apparatus for surveying terrain resistivity Method and apparatus for surveying terrain resistivity

G - Physics

01

V

G01V 3/08 (2006.01) G01V 3/12 (2006.01)

Patent

CA 2100248

Terrain resistivity is mapped by collecting data as to the vertical magnetic field ratio along a survey line by VLF survey techniques, and precision integrating rather than differentiating the data obtained. The received VLF signal is demodulated and low-pass filtered in a manner such as to preserve the DC component of the demodulated signal, and is then digitized and spatially integrated to obtain pseudo-resistivity readings along the survey line.

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