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Test Results From Two Prototype Electromagnetic Systems At The Serdp Standardized Uxo Test Site At Yuma Proving Ground, ArizonaNormal access

Authors: David L. Wright, Theodore H. Asch, Craig W. Moulton, David von G. Smith, S. Raymond Hutton, Erin Wallin, Philip J. Brown and Misac N. Nabighian
Event name: 17th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems
Session: UXO Detection
Publication date: 22 February 2004
Organisations: EEGS
Language: English
Info: Extended abstract, PDF ( 2.93Mb )

Summary:
During February and March, 2003, the U. S. Geological Survey (USGS) conducted tests of the
time-domain Very Early Time Electromagnetic (VETEM) system and the frequency-domain High
Frequency Sounder (HFS) at the Strategic Environmental Research and Development Program (SERDP)
Unexploded Ordnance (UXO) Standardized Test Site at the Yuma Proving Ground (YPG), Arizona. An
objective of these tests was to assess the potential of these systems for UXO applications and to help us
formulate design parameters for an improved electromagnetic system designed specifically for UXO.
Although neither VETEM nor the HFS was designed with UXO applications in mind, both detected the
majority of the buried targets in the Calibration Area at YPG. VETEM responded to earth conductivity
as well as to the buried UXO objects as did the HFS above 20 kHz. Earth response was anticipated
because both VETEM and the HFS were designed to image earth conductivity. Spatial filtering reduced
earth response and system artifacts and enhanced target responses.
We have concluded that a modified “on-time” time-domain system with a multi-component
antenna array and the ability to measure to later times than VETEM provides could improve the
detection performance we obtained from VETEM and the HFS at YPG. In addition, such a system
would furnish the diverse temporal, spatial, and vector component data that should optimize the
potential for UXO target discrimination and identification.

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