Publications Details

Impulsive Magnetic Anomaly Detection At the 100-m Scale With an Array of Induction Coil Magnetometers

Thrasher, Daniel A.; Read, Timothy S.; Iivanainen, Joonas A.; Junor, William; Yang, Xianjin

We demonstrate magnetic anomaly detection (MAD) using an array of 24 commercial induction coil magnetometers with stand-off distances from a pulsed 99.8(3) kA·m2 magnetic dipole source of 260-1200 m. The sparse array is used to estimate the magnetic dipole location, magnitude, and orientation. We demonstrate how independent component analysis (ICA) improves the accuracy and precision of the magnetometer array when estimating the dipole parameters. Using sensor responses recorded from individual source pulses, we estimate the dipole location to within 29 ±; 2 m, the magnitude to within 3 ± kA ·m2, and dipole orientation error to within 19 ± 0.6°.