Accession Number:

AD0770091

Title:

Magnetic Anomaly Detection Utilizing Component Differencing Techniques

Descriptive Note:

Final rept.

Corporate Author:

TEXAS UNIV AT AUSTIN ELECTRONICS RESEARCH CENTER

Report Date:

1973-08-31

Pagination or Media Count:

46.0

Abstract:

A scheme for the detection of the passage of ships and other permeable objects which uses stationary component magnetometers is described. The system requires as complete a cancellation of the natural geomagnetic micropulsation noise as is possible in the frequency range from 0.001 to 1 Hz. A simple method for detecting the magnetic anomaly produced by a passing ship is to form the difference between parallel components of the magnetic field variations at each end of a baseline several miles in length. The geomagnetic micropulsation noise tends to cancel, but the target anomaly is more localized and causes each magnetic sensor to operate almost independently for the target detection. However, in many locations the variation in local geology along the baseline introduces a geology filter which must be removed by more elaborate measurement and computation. Modified author abstract

Subject Categories:

  • Magnetic and Electric Field Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE