Accession Number : ADA569690


Title :   Demonstration Report, Munitions Management Projects, ESTCP Project MR-200809, ALLTEM Multi-Axis Electromagnetic Induction System Demonstration and Validation, Aberdeen Proving Ground Standardized UXO Technology Demonstration Site, Version 1.0


Descriptive Note : Demonstration rept.


Corporate Author : GEOLOGICAL SURVEY WASHINGTON DC


Personal Author(s) : Asch, Theodore H


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a569690.pdf


Report Date : 17 Nov 2011


Pagination or Media Count : 291


Abstract : An advanced multi-axis electromagnetic induction system, ALLTEM, has been specifically designed for detection and discrimination of unexploded ordnance (UXO). This work has been funded by ESTCP (Project MM-0809). ALLTEM uses a continuous trianglewave excitation that measures the target step response rather than the more common impulse response. Ferrous and non-ferrous metal objects have opposite polarities. The system multiplexes through all three orthogonal (Hx, Hy, and Hz axes) transmitting loops and records a total of 19 different transmitting (Tx) and receiving (Rx) loop combinations with a spatial data sampling interval of 15 cm to 20 cm. This report presents the results of a demonstration and validation survey at the Aberdeen Proving Ground in March 2010. The U.S. Geological Survey operated ALLTEM with a Leica 1200 GPS over the Army s UXO Calibration and Blind Test Grids, the Direct Fire Area, and most of the Indirect Fire Area. Routines specifically developed for the ALLTEM in Oasis Montaj were used to analyze the ALLTEM data. This includes importing survey data, gridding, noise analysis for threshold determination, automatic selection of targets, batch inversion of selected targets using prolate, oblate, and ellipsoidal spheroids, and automatic statistical classification of inverted targets into clutter and targets of interest. Ongoing data analyses indicate that the ALLTEM is able to detect anomalous features and to automatically classify targets as being items of interest or not and then to discriminate between munitions types.


Descriptors :   *DEMONSTRATIONS , *DETECTION , *DISCRIMINATE ANALYSIS , *ELECTROMAGNETIC INDUCTION , *UNEXPLODED AMMUNITION , AMMUNITION , ANOMALIES , BATCH PROCESSING , CALIBRATION , CLASSIFICATION , CLUTTER , DATA PROCESSING , DETERMINATION , ELECTROMAGNETIC RADIATION , ELLIPSOIDS , EXCITATION , GUNFIRE , INDIRECT FIRE , INVERSION , IRON ALLOYS , ORTHOGONALITY , PULSES , STATISTICAL ANALYSIS , TEST AND EVALUATION , THRESHOLD EFFECTS


Subject Categories : Numerical Mathematics
      Miscellaneous Detection and Detectors
      Ammunition and Explosives
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE