Method and apparatus for passively detecting the depth and locat

Details Method and apparatus for passively detecting the depth and locat Method and apparatus for passively detecting the depth and locat

1990-03-02

1992-09-15

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

324344, 324348, G01V 308, G01W 116, G01R 1900, G01R 2300

Patent

active

051481103

ABSTRACT:
A method and apparatus for passively determining the depth of an anomaly using means for monitoring a broad spectrum of frequencies and analyzing the amplitude and modulation of a time and/or location varying signal within discrete bands of frequencies to determine the depth of a spatial or temporal anomaly. A means for recording and mapping substerranean features based on an ascending or descending sequence of frequency measurements is also disclosed.

REFERENCES:
patent: 3263161 (1966-07-01), Ruddock et al.
patent: 4616184 (1986-10-01), Lee et al.
patent: 4825165 (1989-04-01), Helms et al.

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