Volume Reverberation in the Fram Strait Marginal Ice Zone: May 1988

At frequencies between 3 and 50 kHz, high volume reverberation levels can have a limiting effect on active sonar operations. Therefore, experiments were conducted by the Naval Research Laboratory to determine the reverberation levels in the marginal ice zone. Three volume reverberation data sets wer...

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Bibliographic Details
Main Author: Wilson, Marcia A.
Other Authors: NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
Format: Text
Language:English
Published: 1993
Subjects:
Snow
Ice and Permafrost
Acoustics
*ICE
*REVERBERATION
*SONAR
*MARGINAL ICE ZONES
FREQUENCY
FUNCTIONS
PULSES
CONFIGURATIONS
OCEANOGRAPHY
FRAM STRAIT
ICELAND
CHUKCHI SEA
GREENLAND
LABORATORIES
NAVAL RESEARCH LABORATORIES
TRANSDUCERS
OPERATION
SIGNALS
SCATTERING
DEPTH
PE62435N
WUDN496443
Arctic
Chukchi Sea
Greenland
Chukchi
Fram Strait
Ice
Iceland
permafrost
Spitsbergen
Online Access:http://www.dtic.mil/docs/citations/ADA272983
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA272983
Description
Summary:At frequencies between 3 and 50 kHz, high volume reverberation levels can have a limiting effect on active sonar operations. Therefore, experiments were conducted by the Naval Research Laboratory to determine the reverberation levels in the marginal ice zone. Three volume reverberation data sets were collected in May 1988 between Greenland and Spitsbergen in the Fram Strait. Data include frequencies from 3.5 to 50 kHz for downward-looking transducers and 3.5 to 12 kHz for an upward-looking configuration. Pulses of 10 and 40 ms in duration were used. Returning signals were processed to show depths and intensities of volume scattering. Layer strengths and column strengths are shown as a function of frequency. Column strengths are compared to those from the Chukchi Sea marginal ice zone and from locations near Greenland and Iceland. Acoustics, Arctic, Physical oceanography.

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