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Title: Methods for Calibrating Basin-Wide Hydroacoustic Propagation in the Indian Ocean

Abstract

This collaborative project was designed to test and compare methods for achieving full ocean basin propagation of hydroacoustic signals in the 5-100 Hz frequency band. Plans for a systematic calibration of the International Monitoring System (IMS) for nuclear testing were under consideration in 2000/2001. The results from this project provide information to guide such planning for future ocean basin calibration work. Several acoustic source types were tested during two sea-going experiments and most were successful at generating signals that propagated hundreds to thousands of km to be recorded at the Indian Ocean IMS hydrophone stations. Development and numerical modeling of imploding glass sphere sources was one component of this testing. The intent was to design a relatively simple-to-use source that is not subject to restrictions that can limit use of explosive charges, but whose signal is large enough to propagate 100-1000's km range. Analysis of IMS hydrophone data recording during the experiments was used to illustrate the extent of energy loss during signal propagation and to assess the accuracy with which the small acoustic sources could be located using methods typically employed for nuclear monitoring.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15011808
Report Number(s):
UCRL-TR-207323
TRN: US200508%%212
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 11 Oct 2004
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; ACCURACY; ACOUSTICS; CALIBRATION; DESIGN; EXPLOSIVES; GLASS; INDIAN OCEAN; MONITORING; PLANNING; SIMULATION; TESTING

Citation Formats

Blackman, D, de Groot-Hedlin, C, Orcutt, J A, Harben, P H, Clarke, D B, and Ramirez, A L. Methods for Calibrating Basin-Wide Hydroacoustic Propagation in the Indian Ocean. United States: N. p., 2004. Web. doi:10.2172/15011808.
Blackman, D, de Groot-Hedlin, C, Orcutt, J A, Harben, P H, Clarke, D B, & Ramirez, A L. Methods for Calibrating Basin-Wide Hydroacoustic Propagation in the Indian Ocean. United States. doi:10.2172/15011808.
Blackman, D, de Groot-Hedlin, C, Orcutt, J A, Harben, P H, Clarke, D B, and Ramirez, A L. Mon . "Methods for Calibrating Basin-Wide Hydroacoustic Propagation in the Indian Ocean". United States. doi:10.2172/15011808. https://www.osti.gov/servlets/purl/15011808.
@article{osti_15011808,
title = {Methods for Calibrating Basin-Wide Hydroacoustic Propagation in the Indian Ocean},
author = {Blackman, D and de Groot-Hedlin, C and Orcutt, J A and Harben, P H and Clarke, D B and Ramirez, A L},
abstractNote = {This collaborative project was designed to test and compare methods for achieving full ocean basin propagation of hydroacoustic signals in the 5-100 Hz frequency band. Plans for a systematic calibration of the International Monitoring System (IMS) for nuclear testing were under consideration in 2000/2001. The results from this project provide information to guide such planning for future ocean basin calibration work. Several acoustic source types were tested during two sea-going experiments and most were successful at generating signals that propagated hundreds to thousands of km to be recorded at the Indian Ocean IMS hydrophone stations. Development and numerical modeling of imploding glass sphere sources was one component of this testing. The intent was to design a relatively simple-to-use source that is not subject to restrictions that can limit use of explosive charges, but whose signal is large enough to propagate 100-1000's km range. Analysis of IMS hydrophone data recording during the experiments was used to illustrate the extent of energy loss during signal propagation and to assess the accuracy with which the small acoustic sources could be located using methods typically employed for nuclear monitoring.},
doi = {10.2172/15011808},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {10}
}

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