USA provides full digital geophysical mapping (DGM) services. To date, USA has completed 44 DGM projects as a prime or subcontractor, including the support and use of Vehicular Simultaneous Electromagnetic Induction (EMI) and Magnetometer System (VSEMS), formerly known as the Simultaneous Multi-sensor Surface Towed Ordnance Locator System (STOLS). We self-perform using the latest electromagnetic and magnetometer sensors, including EM63, underwater EM61 (used at the former Frankford Arsenal GPO), EM61-MK2 or MK2A and G-858 in single sensor, gradiometer configurations, and towed arrays. USA constantly fields the latest technology. At Waikoloa, Hawaii, USA utilized Personal Digital Assistant (PDA)/Global Positioning System (GPS) data collection tool. USA also evaluates the multi-gate EM basalt discrimination developed for the EM63 in support of the EM61 MK2 Waikoloa Phase III Geophysical Prove Out (GPO).
Our DGM Team is led by USA’s Program Geophysicist, who has more than 30 years of directly relevant experience. We use Geosoft’s OASIS montaj with UX-Process, the latest QA/QC tools, and UX_Analyze for processing and analysis. Our DGM surveys use multiple positioning techniques appropriate to the site. These include survey-grade GPS, traditional fiducial marks, and laser ranging systems. Survey methodologies include grid, transect, meandering paths, and entire area surveys. Additionally, USA uses the latest analog sensors for MEC operations, including Minelab Explorer II and White’s Surfmaster P.I. Pro for underwater work in Vieques.