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22nd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems
- Conference date: 29 Mar 2009 - 02 Apr 2009
- Location: Forth Worth, Texas, USA
- Published: 29 March 2009
121 - 124 of 124 results
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Analysis of Variables for Detection of MEC in Diverse Environments and Conditions
Authors H. Wagner, D. Hall, B. Brunette and R. PerryThe best processing techniques for EM61 data are site specific, but how do you
determine them upon arrival at a new site? While the Geonics EM61 has been the industry
standard for munitions and explosives of concern (MEC) detection for nearly a decade, exclusive
use of Channel 3 is no longer a common practice.
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The ALLTEM Unexploded Ordnance (UXO) Detection and Discrimination System, MK2
Authors T. Asch, D. Wright, C. Moulton, P. Wigton, T. Irons, R. Bracken and D. SmithThe ALLTEM, an advanced multi-axis electromagnetic induction system, was specifically
designed for detection and discrimination of unexploded ordnance (UXO). ALLTEM uses a continuous
triangle-wave excitation that measures the target step response rather than the more common impulse
response.
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Localized Mapping of EMI Sensor Data with an Inertial Measurement Unit for Buried Object Classification
Authors B. Barrow, D. Keiswetter, B. Clark and C. McNeillAdvancements are being made to a system that uses an inertial measurement unit (IMU) to
locally position an electromagnetic induction (EMI) sensor. The Small Area Inertial Navigation
Tracking system (SAINT) has been interfaced to an EM61-HH with the EMI data logged on a handheld
computer. To improve timing accuracy of the IMU and EMI data, a single board computer (SBC) is
being implemented to collect measurements from both. This SBC system will include digital I/O options
to interface to other advanced EMI systems under development. Operationally, the system can be swept
about over a localized EMI anomaly for thirty seconds. In post-processing, the EMI sensor data is
mapped out in both position and orientation.
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The Application of Induced Polarization Techniques to Detect Metal-Bearing Offshore Anthropogenic Waste and Unexploded Ordnance
Authors J. Wynn and W. RobertsRaw sewage and industrial waste have been dumped into sensitive estuaries, bays, and sounds
for centuries. The full extents of the resulting sludge deposits are largely unknown, because they move
in response to tidal and long-shore currents, and because they are often buried by younger inert
sediments.
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