A Shallow Water Uxo Survey System

With support of the Environmental Security Technology Certification Program (ESTCP), AETC<br>is developing a UXO survey system for use in shallow water (up to 15 feet deep). The sensor platform<br>incorporates both an array of Cs-vapor magnetometers and a time domain EMI sensor array. A<br>performance modeling study defined the platform operational and deployment concepts. An<br>engineering design study established the performance characteristics of the new time-domain EMI<br>sensor, which incorporates an extended transmitter, coupled with an array of four receive coils. The<br>system incorporates a pilot guidance survey navigation aid, a dual GPS sensor system to provide<br>positioning and attitude information, and the Data Acquisition (DAQ) and Data Analysis Systems<br>(DAS) adapted from the Airborne Multi-sensor Towed Array Detection System (MTADS), which<br>incorporate 3-dimensional sensor position information into a 3-dimensional, physics-based target fitting<br>GUI. Additional marine components include an autopilot system to control the depth and attitude of the<br>sensor platform, digital magnetic compasses, a high-frequency digital imaging sonar, an inertial attitude<br>measurement sensor, depth sensors, and echo sounders. The tow vessel is a pontoon boat. The first full<br>scale demonstration at a former UXO target range will take place in 2005.