Precision Geolocation of Active Electromagnetic Sensors Using Stationary Magnetic Sensors

摘要

The objective of this project was to conduct a proof-of-principle demonstration that a single, fixed gradiometer or vector magnetometer could track an active EM sensor at sub-centimeter position and sub-degree accuracy over short baselines. We have shown that the concept of locating a UXO cart via the measurement of its transmitter signal is sound. Further work is warranted to develop a more precise system. Some of the areas that we recommend pursuing are: Develop and trial a refined model of the transmitter source for inversion optimization; investigate the potential of other sensors; investigate the observed unexpected limitation in both the fluxgate and SQUID sensor systems' signal to noise ratio; determine the level of accuracy obtainable when the cart is in motion; Develop and trial improved signal processing and inversion algorithms; and investigate the feasibility of using the technique within the marine environment.