Standardized UXO Technology Demonstration Site Scoring Record No. 933. Simultaneous Electromagnetic (EM) and Magnetometry (Multisensor STOLS)/Towed Array

摘要

This scoring record documents the efforts of GEO-CENTERS, Inc. to detect, discriminate inert unexploded ordnance (UXO) utilizing the APG Standardized UXO Technology Demonstration Site Blind Grid, Open Field and Active Sites. GEO-CENTERS' existing Surface Towed Ordnance Location System (STOLS) was used as a host system; STOLS' custom-fabricated aluminum dune buggy with a low-magnetic self-signature, magnetometers, differential Global Positioning System (GPS), sensors, computers and tractor-trailer for transportation were reused. The new Simultaneous EM and Magnetometry system augments STOLS with interleaved sampling electronics that allow EM61 coils to be physically located on the same platform as the magnetometers without corrupting the magnetometer data. The electronics monitor the rising edge of the 75-Hz transmit pulse from the EM61 wait for the pulse to die down, sample the magnetometers for 5 ms, then wait for the next transmit pulse and repeat the cycle.