Method and apparatus for passively detecting the depth and location of a spatial or temporal anomaly by monitoring a time varying signal emanating from the earths surface
First Claim
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1. A method of passively determining the depth of a spatial or temporal anomaly occurring beneath the terrain or water surface of the earth and in the vicinity of a location of interest, comprising the steps of:
- passively monitoring a time-varying signal from a source emanating from the earth;
measuring the amplitude or modulation changes in said time-varying signal in the form of a broad spectrum of frequency data for variations indicative of a spatial or temporal anomaly;
recording said data in a recording medium;
processing said data to produce a sequential frequency spectra of said time-varying signals within a frequency band of interest, wherein each frequency spectra is representative of a particular depth; and
identifying the location of said spatial or temporal anomaly with said processed data.
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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.
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Citations
21 Claims
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1. A method of passively determining the depth of a spatial or temporal anomaly occurring beneath the terrain or water surface of the earth and in the vicinity of a location of interest, comprising the steps of:
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passively monitoring a time-varying signal from a source emanating from the earth; measuring the amplitude or modulation changes in said time-varying signal in the form of a broad spectrum of frequency data for variations indicative of a spatial or temporal anomaly; recording said data in a recording medium; processing said data to produce a sequential frequency spectra of said time-varying signals within a frequency band of interest, wherein each frequency spectra is representative of a particular depth; and identifying the location of said spatial or temporal anomaly with said processed data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of locating a temporal or spatial anomaly comprising:
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receiving, with an antenna, signals originating from a source emanating from the earth indicative of an alternating component of a generally vertical current emanating from the earth; filtering said signals into a plurality of frequency bands, each indicative of a characteristic depth of an anomaly; and processing said filtered signals with data corresponding to said phenomenon to thereby indicate the location and depth of said anomaly.
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12. An apparatus for passively detecting the location and depth of a spatial or temporal anomaly comprising:
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means for receiving a broad spectrum frequency emanating from the earth; means connected to said receiving means for separating said signal into a plurality of signals corresponding to a plurality of frequency bands; means connected to said separating means for recording the signals in each of said frequency bands; and means connected to said recording means for processing the plurality of frequency signals with data correlating said frequency information to depth to thereby indicate the depth of the anomaly. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus for passively detecting the depth of a spatial or temporal anomaly comprising:
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means for receiving a broad spectrum frequency emanating from the earth; means connected to said receiving means for amplifying and filtering said signal; means connected to said amplifying and filtering means for recording said signal; and means connected to said recording means for processing said signals to correlate said frequency information to depth to thereby indicate the depth of said anomaly. - View Dependent Claims (18, 19, 20)
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21. A method of passively monitoring onset and depth of a temporal anomaly occurring between the terrain or water surface of the earth and in the vicinity of a location of interest, comprising the steps of:
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measuring a time-varying signal emanating from the earth in the form of a broad spectrum of frequency data for variations indicative of the depth of said spatial or temporal anomaly; recording said data in a recording medium; processing said data to produce a normal sequential spectra of time-varying signals within a frequency band of interest, wherein each spectra is representative of a particular depth; monitoring said time-varying signals over time; comparing the monitored signals with said normal spectra of time-varying signals; and generating a signal when the amplitude or modulation of said time-varying signals change over time.
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Specification