Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation
Path averaged boundary layer measurements were carried during the spring of 1989 at the Oceanography ice camp ('O camp') North of Spitsbergen as part of the Coordinated Eastern Arctic Experiment (CEAREX). In this report, describes the acoustic instrumentation used, summarize the field trip...
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ftdtic:ADA213596 2023-05-15T14:46:37+02:00 Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation INSTITUTE OF OCEAN SCIENCES SIDNEY (CANADA) 1989-10-10 text/html http://www.dtic.mil/docs/citations/ADA213596 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA213596 en eng http://www.dtic.mil/docs/citations/ADA213596 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost Acoustics *TURBULENT BOUNDARY LAYER *UNDERICE *SCINTILLATION *UNDERWATER ACOUSTICS PROCESSING EQUIPMENT CORRELATION VECTOR ANALYSIS INSTRUMENTATION ACOUSTIC SIGNALS ACOUSTIC EQUIPMENT ARRIVAL AMPLITUDE VIDEO RECORDING ELECTROACOUSTIC TRANSDUCERS ARCTIC REGIONS OCEANOGRAPHY SPREAD SPECTRUM BOUNDARY LAYER REAL TIME MEASUREMENT SIGNAL PROCESSING DATA PROCESSING CEAREX(COORDINATED EASTERN ARCTIC EXPERIMENT) Text 1989 ftdtic 2016-02-23T04:57:46Z Path averaged boundary layer measurements were carried during the spring of 1989 at the Oceanography ice camp ('O camp') North of Spitsbergen as part of the Coordinated Eastern Arctic Experiment (CEAREX). In this report, describes the acoustic instrumentation used, summarize the field trip, and talk about the preliminary data analysis and scientific investigation which is underway at the Institute of Ocean Sciences. An acoustic instrument has been developed in order to study the turbulent boundary layer under the Arctic ice cover. The instrument comprises twelve transducers capable of both transmission and reception of a spread spectrum signal centered at 132.3 kHz. Pseudo-random phase-encoded binary sequences are transmitted. Real-time correlation is performed by vector signal processing hardware contained in pressure housings adjacent to each transducer. The accompanying electronics allow the measurement and storage on Video Cassette Recorder (VCR) tapes of time of arrival amplitude and phase of the received acoustic signals. Text Arctic Ice permafrost Spitsbergen Defense Technical Information Center: DTIC Technical Reports database Arctic |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Acoustics *TURBULENT BOUNDARY LAYER *UNDERICE *SCINTILLATION *UNDERWATER ACOUSTICS PROCESSING EQUIPMENT CORRELATION VECTOR ANALYSIS INSTRUMENTATION ACOUSTIC SIGNALS ACOUSTIC EQUIPMENT ARRIVAL AMPLITUDE VIDEO RECORDING ELECTROACOUSTIC TRANSDUCERS ARCTIC REGIONS OCEANOGRAPHY SPREAD SPECTRUM BOUNDARY LAYER REAL TIME MEASUREMENT SIGNAL PROCESSING DATA PROCESSING CEAREX(COORDINATED EASTERN ARCTIC EXPERIMENT) |
spellingShingle |
Snow Ice and Permafrost Acoustics *TURBULENT BOUNDARY LAYER *UNDERICE *SCINTILLATION *UNDERWATER ACOUSTICS PROCESSING EQUIPMENT CORRELATION VECTOR ANALYSIS INSTRUMENTATION ACOUSTIC SIGNALS ACOUSTIC EQUIPMENT ARRIVAL AMPLITUDE VIDEO RECORDING ELECTROACOUSTIC TRANSDUCERS ARCTIC REGIONS OCEANOGRAPHY SPREAD SPECTRUM BOUNDARY LAYER REAL TIME MEASUREMENT SIGNAL PROCESSING DATA PROCESSING CEAREX(COORDINATED EASTERN ARCTIC EXPERIMENT) Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
topic_facet |
Snow Ice and Permafrost Acoustics *TURBULENT BOUNDARY LAYER *UNDERICE *SCINTILLATION *UNDERWATER ACOUSTICS PROCESSING EQUIPMENT CORRELATION VECTOR ANALYSIS INSTRUMENTATION ACOUSTIC SIGNALS ACOUSTIC EQUIPMENT ARRIVAL AMPLITUDE VIDEO RECORDING ELECTROACOUSTIC TRANSDUCERS ARCTIC REGIONS OCEANOGRAPHY SPREAD SPECTRUM BOUNDARY LAYER REAL TIME MEASUREMENT SIGNAL PROCESSING DATA PROCESSING CEAREX(COORDINATED EASTERN ARCTIC EXPERIMENT) |
description |
Path averaged boundary layer measurements were carried during the spring of 1989 at the Oceanography ice camp ('O camp') North of Spitsbergen as part of the Coordinated Eastern Arctic Experiment (CEAREX). In this report, describes the acoustic instrumentation used, summarize the field trip, and talk about the preliminary data analysis and scientific investigation which is underway at the Institute of Ocean Sciences. An acoustic instrument has been developed in order to study the turbulent boundary layer under the Arctic ice cover. The instrument comprises twelve transducers capable of both transmission and reception of a spread spectrum signal centered at 132.3 kHz. Pseudo-random phase-encoded binary sequences are transmitted. Real-time correlation is performed by vector signal processing hardware contained in pressure housings adjacent to each transducer. The accompanying electronics allow the measurement and storage on Video Cassette Recorder (VCR) tapes of time of arrival amplitude and phase of the received acoustic signals. |
author2 |
INSTITUTE OF OCEAN SCIENCES SIDNEY (CANADA) |
format |
Text |
title |
Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
title_short |
Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
title_full |
Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
title_fullStr |
Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
title_full_unstemmed |
Path Averaged Boundary Layer Measurements Beneath Ice Using Acoustic Scintillation |
title_sort |
path averaged boundary layer measurements beneath ice using acoustic scintillation |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA213596 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA213596 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Spitsbergen |
genre_facet |
Arctic Ice permafrost Spitsbergen |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA213596 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766317824537526272 |