Accession Number : ADA631424


Title :   EM-63 Decay Curve Analysis for UXO Discrimination


Descriptive Note : Final rept. 1 Mar 2000-7 Sep 2001


Corporate Author : NAEVA GEOPHYSICS INC CHARLOTTESVILLE VA


Personal Author(s) : Allan, John ; Ware, G H


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA631424


Report Date : 07 Sep 2001


Pagination or Media Count : 50


Abstract : The DoD is currently involved in a number of UXO site remediation efforts where rapid transition of advanced technologies can save substantial sums of money and significantly expedite the transfer of lands for re-use. One of the most prominent of these efforts is the ongoing UXO cleanup of the Kaho'olawe bombing ranges. The major difficulty with this site is that the significant magnetic anomalies from geologic sources and near-surface fragments make traditional magnetometer-based surveys impractical. Standard EM-61 metal detection surveys have also performed poorly in these conditions, due to the very high magnetic susceptibility response of basalt and basaltic soils. The focus of this project is to evaluate the Geonics EM-63 multi-gate time domain metal detector, in order to quantify its detection, discrimination, cost, and production rates while operating at several locations within Jefferson Proving Ground (JPG) that contain varying degrees of magnetic noise levels. Following in-depth evaluation of performance at the JPG site, ESTCP plans to transition the most promising technologies to Kaho'olawe for additional demonstrations at controlled and live sites during FY01. This project was designed to incorporate the lessons learned from previous UXO technology demonstrations and to extend the results of the JPG Phase IV Demonstrations that were completed during FY 97. The JPG IV results indicated that advanced UXO sensing and processing technologies have the potential to significantly reduce the number of false alarms. Unfortunately, those demonstrations incorporated a number of artificial factors that limited the validity of the conclusions that could be determined from the results. Some of the artificialities included the use of non-realistic clutter items, the fact that all of the clutter items were made available to the demonstrators for system training prior to the field tests, and the lack of wide area search requirements.


Descriptors :   *EXPLOSIVE ORDNANCE DISPOSAL , *MAGNETIC ANOMALIES , *RANGES(FACILITIES) , *UNEXPLODED AMMUNITION , AREA SCANNING , BASALT , BURIED OBJECTS , FIELD TESTS , LESSONS LEARNED , METAL DETECTORS , TEST AND EVALUATION , VALIDATION


Subject Categories : Geology, Geochemistry and Mineralogy
      Magnetic & Electric Fld Detection & Detectors
      Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE