An experimental facility which measures and stores magnetostatic signatures of ferrous objects as a function of position and allows online analysis of the data is described. The facility consists of a remotely situated nonmetallic laboratory which contains two caesium vapour magnetometers. One magnetometer is stationary and is used to correct for geomagnetic fluctuations. The other magnetometer moves on a track and its position is measured by an optoelectronics sensor system. The magnetometers and position measuring system are controlled by a microcomputer through a special purpose interface and communicate with a distant mainframe computer. Data are presented to demonstrate some of the capabilities of the facility.
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McFee et al. (1985) studied this question.
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