Evaluation of electromagnetic source for ocean climate acoustic thermometry at Lake Seneca
Spiesberger, John L.
Boutin, Paul R.
MetadataShow full item record
LocationLake Seneca, NY
A compact electromagnetic monopole source, requiring pressure equalization, was evaluated at the Naval Underwater Systems Center at Lake Seneca during July 1992 by scientists from the Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS) and from the Woods Hole Oceanographic Institution and other American organizations. The titaium source was developed at the IAP RAS. The source has a mass of 123 kg and a diameter of .54 m. The source cannot be thought of as a single unit; rather the characteristics of the transmitted signal depend on a transmission system consisting of the source, the power amplifier, and a computer. The computer and the amplifier send specially adapted signals to the source to produce the desired acoustic signals. Measurements indicate the acoustic system as a center frequence of 225 Hz, a bandwidth of about 50 Hz, an associated pulse resolution of about 0.02 s, a source level of about 198 dB re 1 μpa @ 1 m, with an efficiency of about 50%. The system has an efficiency of about 67% near 225 Hz, the resonant frequence. The source is suitable for mounting on autonomous ocean moorings for several years as part of a system of monitoring climatic temperature changes over basin scales.
Suggested CitationTechnical Report: Slavinsky, Mark, Bogolubov, Boris, Alelekov, Igor, Pigalov, Konstantin, Spiesberger, John L., Boutin, Paul R., "Evaluation of electromagnetic source for ocean climate acoustic thermometry at Lake Seneca", 1993-02, DOI:10.1575/1912/617, https://hdl.handle.net/1912/617
Showing items related by title, author, creator and subject.
Low-frequency broadband sound source localization using an adaptive normal mode back-propagation approach in a shallow-water ocean Lin, Ying-Tsong; Newhall, Arthur E.; Lynch, James F. (Acoustical Society of America, 2012-02)A variety of localization methods with normal mode theory have been established for localizing low frequency (below a few hundred Hz), broadband signals in a shallow water environment. Gauss-Markov inverse theory is employed ...
Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters Xu, Wen (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-06)Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two ...
Stephen, Ralph A.; Bolmer, S. Thompson; Udovydchenkov, Ilya A.; Worcester, Peter F.; Dzieciuch, Matthew A.; Andrew, Rex K.; Mercer, James A.; Colosi, John A.; Howe, Bruce M. (Acoustical Society of America, 2013-10)Ocean bottom seismometer observations at 5000 m depth during the long-range ocean acoustic propagation experiment in the North Pacific in 2004 show robust, coherent, late arrivals that are not readily explained by ocean ...