Testing of an EM induction platform for UXO discrimination on a seeded site with real exploded shell fragment clutter

We present the analysis results of EM induction sensor data collected on a live ordnance site. The site was a practice firing range for 105-mm, 155-mm, and 8-inch projectiles. Because of the low density of unexploded rounds, a test area was set up where inert rounds were seeded in an area of exploded clutter. Individual anomaly signatures are fitted to a simple induced dipole response model based on each compact metallic object being characterized by three orthogonal magnetic polarization coefficients along the object´s axes of symmetry. We find that a high degree of discrimination between the intact rounds and clusters of exploded fragments is possible based on these model parameters. However, the fit results quickly degrade for anomalies with low signal to noise.