Underwater magnetic target localization and characterization using a three-axis gradiometer

摘要: Magnetometers and magnetic gradiometers are commonly used to detect ferromagnetic targets. When the distance target is large compared its size, can be modeled as a dipolar source then characterized by single vector: moment. The estimation of moment reduce false alarm rate. We consider total-field three-axis gradiometer which measures gradient magnitude field along three orthogonal axes. show that for an ideal gradiometer, inversion problem separates into two linear problems therefore solved without any initial parameters. Moreover, method applied directly on data gathered grid interpolation in real time. For considered better parameters obtained if detailed geometry (location magnetometers) taken account. extended magnetometers, vertical gradiometers, horizontal tensor gradiometers. Finally, we analyze effect various survey (gradiometer altitude, inter-track moment) accuracy estimated presence noise (magnetic error position gradiometer).