Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry
Data has been collected on acoustic vector sensors mounted on autonomous underwater gliders in the Monterey Bay during 2012 2013. Previous processing work computed the acoustic vector intensity to estimate bearing to impulsive sources of interest. These sources included small explosive shots deploye...
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ftdtic:ADA607654 2023-05-15T16:36:06+02:00 Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry Kubisak, Timothy D NAVAL POSTGRADUATE SCHOOL MONTEREY CA 2014-06 text/html http://www.dtic.mil/docs/citations/ADA607654 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA607654 en eng http://www.dtic.mil/docs/citations/ADA607654 Approved for public release; distribution is unlimited. DTIC Physical and Dynamic Oceanography Acoustic Detection and Detectors *ACOUSTIC DETECTORS *BATHYMETRY *GLIDERS *UNDERWATER VEHICLES ACOUSTIC SIGNALS ACOUSTIC VELOCITY AUTONOMOUS NAVIGATION BEAM FORMING FREQUENCY BANDS THESES THREE DIMENSIONAL ACOUSTIC VECTOR SENSORS Text 2014 ftdtic 2016-02-24T15:59:51Z Data has been collected on acoustic vector sensors mounted on autonomous underwater gliders in the Monterey Bay during 2012 2013. Previous processing work computed the acoustic vector intensity to estimate bearing to impulsive sources of interest. These sources included small explosive shots deployed by local fishermen and humpback whale vocalizations. While the highly impulsive shot data produced unambiguous bearing estimations, the longer duration whale vocalizations showed a fairly wide spread in bearing. In this work, causes of the ambiguity in bearing estimation are investigated in the context of the highly variable bathymetry of the Monterey Bay Canyon, as well as the coherent multipath interference in the longer duration calls. Sound speed data collected during the previous experimental effort, along with a three-dimensional bathymetric relief of the Monterey Bay Canyon, are incorporated into a three-dimensional version of the Monterey-Miami Parabolic Equation Model. Propagation results are computed over a frequency band from 336 464 Hz in order to provide predictions of pulse arrival structure. This data is analyzed using conventional pressure plane-wave beamforming techniques in order to highlight horizontal coupling caused by the canyon bathymetry. The data is also analyzed using the previously developed acoustic vector intensity processing string and shown to exhibit a qualitatively similar spread in the estimated bearing. Text Humpback Whale Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
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English |
topic |
Physical and Dynamic Oceanography Acoustic Detection and Detectors *ACOUSTIC DETECTORS *BATHYMETRY *GLIDERS *UNDERWATER VEHICLES ACOUSTIC SIGNALS ACOUSTIC VELOCITY AUTONOMOUS NAVIGATION BEAM FORMING FREQUENCY BANDS THESES THREE DIMENSIONAL ACOUSTIC VECTOR SENSORS |
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Physical and Dynamic Oceanography Acoustic Detection and Detectors *ACOUSTIC DETECTORS *BATHYMETRY *GLIDERS *UNDERWATER VEHICLES ACOUSTIC SIGNALS ACOUSTIC VELOCITY AUTONOMOUS NAVIGATION BEAM FORMING FREQUENCY BANDS THESES THREE DIMENSIONAL ACOUSTIC VECTOR SENSORS Kubisak, Timothy D Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
topic_facet |
Physical and Dynamic Oceanography Acoustic Detection and Detectors *ACOUSTIC DETECTORS *BATHYMETRY *GLIDERS *UNDERWATER VEHICLES ACOUSTIC SIGNALS ACOUSTIC VELOCITY AUTONOMOUS NAVIGATION BEAM FORMING FREQUENCY BANDS THESES THREE DIMENSIONAL ACOUSTIC VECTOR SENSORS |
description |
Data has been collected on acoustic vector sensors mounted on autonomous underwater gliders in the Monterey Bay during 2012 2013. Previous processing work computed the acoustic vector intensity to estimate bearing to impulsive sources of interest. These sources included small explosive shots deployed by local fishermen and humpback whale vocalizations. While the highly impulsive shot data produced unambiguous bearing estimations, the longer duration whale vocalizations showed a fairly wide spread in bearing. In this work, causes of the ambiguity in bearing estimation are investigated in the context of the highly variable bathymetry of the Monterey Bay Canyon, as well as the coherent multipath interference in the longer duration calls. Sound speed data collected during the previous experimental effort, along with a three-dimensional bathymetric relief of the Monterey Bay Canyon, are incorporated into a three-dimensional version of the Monterey-Miami Parabolic Equation Model. Propagation results are computed over a frequency band from 336 464 Hz in order to provide predictions of pulse arrival structure. This data is analyzed using conventional pressure plane-wave beamforming techniques in order to highlight horizontal coupling caused by the canyon bathymetry. The data is also analyzed using the previously developed acoustic vector intensity processing string and shown to exhibit a qualitatively similar spread in the estimated bearing. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Kubisak, Timothy D |
author_facet |
Kubisak, Timothy D |
author_sort |
Kubisak, Timothy D |
title |
Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
title_short |
Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
title_full |
Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
title_fullStr |
Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
title_full_unstemmed |
Investigation of Acoustic Vector Sensor Data Processing in the Presence of Highly Variable Bathymetry |
title_sort |
investigation of acoustic vector sensor data processing in the presence of highly variable bathymetry |
publishDate |
2014 |
url |
http://www.dtic.mil/docs/citations/ADA607654 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA607654 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA607654 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766026406543753216 |