Abstract
Fluctuations of acoustic transmission were measured for resolved refracted-refracted ray paths at three long ranges in the deep ocean (258, 410, 560 km). A moored broadband source with center frequency of 460 Hz transmitted continuously for a period of several days from each range. Received signals were processed to give time histories of complex pulse response. Fluctuation statistics are computed for the carrier line, the combined multipath signal, and time gated arrivals associated with predicted paths. Refracted arrivals are identified by ray models, and statistics are computed for resolved paths, unresolved paths, unresolved doublets of upgoing and downgoing rays, and the combined multipath. A second mooring was used to measure temperature fluctuations associated with internal waves and for estimating the magnitude and vertical coherence of soundspeed fluctuations during the acoustic experiments. The authors report statistics of fluctuations and compare measurement with predictions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1448-1463 |
| Number of pages | 16 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 74 |
| Issue number | 5 |
| State | Published - Nov 1983 |
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ASJC Scopus subject areas
- Acoustics and Ultrasonics
Cite this
MEASUREMENTS OF TRANSMISSION FLUCTUATIONS AT THREE RANGES FOR REFRACTED PATHS THROUGH THE DEEP OCEAN. / Deferrari, Harry A; Davis, R. I.; Nguygen, H.; Tusting, R. F.; Williams, N. J.
In: Journal of the Acoustical Society of America, Vol. 74, No. 5, 11.1983, p. 1448-1463.Research output: Contribution to journal › Article
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TY - JOUR
T1 - MEASUREMENTS OF TRANSMISSION FLUCTUATIONS AT THREE RANGES FOR REFRACTED PATHS THROUGH THE DEEP OCEAN.
AU - Deferrari, Harry A
AU - Davis, R. I.
AU - Nguygen, H.
AU - Tusting, R. F.
AU - Williams, N. J.
PY - 1983/11
Y1 - 1983/11
N2 - Fluctuations of acoustic transmission were measured for resolved refracted-refracted ray paths at three long ranges in the deep ocean (258, 410, 560 km). A moored broadband source with center frequency of 460 Hz transmitted continuously for a period of several days from each range. Received signals were processed to give time histories of complex pulse response. Fluctuation statistics are computed for the carrier line, the combined multipath signal, and time gated arrivals associated with predicted paths. Refracted arrivals are identified by ray models, and statistics are computed for resolved paths, unresolved paths, unresolved doublets of upgoing and downgoing rays, and the combined multipath. A second mooring was used to measure temperature fluctuations associated with internal waves and for estimating the magnitude and vertical coherence of soundspeed fluctuations during the acoustic experiments. The authors report statistics of fluctuations and compare measurement with predictions.
AB - Fluctuations of acoustic transmission were measured for resolved refracted-refracted ray paths at three long ranges in the deep ocean (258, 410, 560 km). A moored broadband source with center frequency of 460 Hz transmitted continuously for a period of several days from each range. Received signals were processed to give time histories of complex pulse response. Fluctuation statistics are computed for the carrier line, the combined multipath signal, and time gated arrivals associated with predicted paths. Refracted arrivals are identified by ray models, and statistics are computed for resolved paths, unresolved paths, unresolved doublets of upgoing and downgoing rays, and the combined multipath. A second mooring was used to measure temperature fluctuations associated with internal waves and for estimating the magnitude and vertical coherence of soundspeed fluctuations during the acoustic experiments. The authors report statistics of fluctuations and compare measurement with predictions.
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M3 - Article
AN - SCOPUS:0020850407
VL - 74
SP - 1448
EP - 1463
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
SN - 0001-4966
IS - 5
ER -