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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Dosso, S.E. |
| Copyright Year | 2013 |
| Description | Author affiliation: Sch. of Earth & Ocean Sci., Univ. of Victoria, Victoria, BC, Canada (Dosso, S.E.) |
| Abstract | This paper presents an approach to three-dimensional (3-D) localization of an acoustic source in the water column using a single three-component geophone mounted on the surface of Arctic sea ice. Source bearing is estimated by computing the received signal power as a function of horizontal look angle, applying seismic polarization filters to suppress ice shear waves with transverse particle motion. The inherent 180° ambiguity is resolved by considering vertical-radial particle motion, providing a unique bearing estimate. Source range and depth are estimated from arrival-time differences of the direct water-borne acoustic wave and ice seismic waves including the longitudinal plate mode and horizontally-polarized shear mode. This produces a system of two quadratic equations in two unknowns (range and depth) which admits two solutions, one of which corresponds to the correct source location; the secondary solution is often at an unphysical depth. The 3-D localization approach is applied to seismo-acoustic recordings collected on smooth and rough/ridged annual ice and on a multi-year ice floe. The results indicate good 3-D localization over the limited range over which first-break arrivals of the ice seismic waves could be reliably detected. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 1314375 |
| Page Count | 5 |
| File Format | |
| e-ISBN | 9781479900015 |
| DOI | 10.1109/OCEANS-Bergen.2013.6607963 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-10 |
| Publisher Place | Norway |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Ice Seismic waves Arctic Acoustic waves Estimation Direction-of-arrival estimation ice seismic waves three-dimensional source localization |
| Content Type | Text |
| Resource Type | Article |
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