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Proceedings Paper

Comparison of methods for 3D target localization from seismic and acoustic signatures
Author(s): Gregory J. Elbring; H. Douglas Garbin; Mark D. Ladd
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Paper Abstract

An important application of seismic and acoustic unattended ground sensors (UGS) is the estimation of the 3D position of an emitting target. Seismic and acoustic data derived from UGS systems provide the raw information to determine these locations, but can be processed and analyzed in a number of ways using varying amounts of auxiliary information. Processing methods to improve arrival time picking for continuous wave sources and methods for determining and defining the seismic velocity model are the primary variables affecting the localization accuracy. Results using field data collected from an underground facility have shown that using an iterative time picking technique significantly improves the accuracy of the resulting derived target location. Other processing techniques show little advantage over simple crosscorrelation alone in terms of accuracy, but may improve the ease with which time picks can be made. An average velocity model found through passive listening or a velocity model determined from a calibration source near the target source both result in similar location accuracies. Surprisingly, the use of average station corrections severely increases the location error.

Paper Details

Date Published: 21 July 2000
PDF: 11 pages
Proc. SPIE 4040, Unattended Ground Sensor Technologies and Applications II, (21 July 2000); doi: 10.1117/12.392578
Show Author Affiliations
Gregory J. Elbring, Sandia National Labs. (United States)
H. Douglas Garbin, Sandia National Labs. (United States)
Mark D. Ladd, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 4040:
Unattended Ground Sensor Technologies and Applications II
Edward M. Carapezza; Todd M. Hintz, Editor(s)

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