Magnetic Anomaly Detection Utilizing Component Differencing Techniques
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1973
- Accession Number
- AD0770091
Entities
People
- Brooks C. Fowler
- F. X. Bostick Jr.
- H. W. Smith
Organizations
- University of Texas at Austin