EMI Array for Cued UXO Discrimination
Abstract
The Chemistry Division of the Naval Research Laboratory (NRL) has participated in several programs funded by the Strategic Environmental Research and Development Program (SERDP) and the Environmental Security Technology Certification Program (ESTCP) whose goal has been to enhance the classification ability of the Multisensor Towed Array Detection System (MTADS). The process has been based on making use of both the location information inherent in an item's magnetometry response and the shape and size information inherent in the response to electromagnetic induction (EMI) sensors. To date, most of these systems have used timedomain EMI (TEM) sensors with the notable exception of the Geophex GEM-3 frequencydomain sensor. In past efforts, classification performance has been limited by both the information available from the EMI sensors and by signal-to-noise limitations. Three of the largest noise terms are inherent sensor noise, motion-induced noise, and sensor location uncertainty. The three most successful demonstrations to date of EMI-based discrimination all involved cued detection with gridded collection of EMI data. The success of the gridded data collections was due to the combination of minimal location uncertainty, no motion-induced noise, and sufficient signal-to-noise ratio (SNR). The downside of the implementations previously demonstrated is that they were relatively slow and inefficient, especially on a large site. The time-domain electromagnetic MTADS (TEMTADS) array was designed to combine the data quality advantages of a gridded survey with the coverage efficiencies of a vehicular system. The design goal of this system was to collect data equal, if not better, in quality to the best gridded surveys (the relative position and orientation of the sensors being known better for gridded data) while prosecuting many more targets each field day.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2010
- Accession Number
- ADA539449
Entities
People
- Daniel A. Steinhurst
- David C. George
- Dean A. Keiswetter
- Glenn R. Harbaugh
- James B. Kingdonb
- Thomas H. Bell
- Tom Furuya
Organizations
- Environmental Security Technology Certification Program