ANALYSIS OF HIGH-FREQUENCY MULTITONE TRANSMISSIONS PROPAGATED IN THE MARGINAL ICE-ZONE

被引:6
作者
CATIPOVIC, JA [1 ]
BAGGEROER, AB [1 ]
机构
[1] MIT,CAMBRIDGE,MA 02139
关键词
D O I
10.1121/1.399939
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
This work presents estimates of frequency and time coherence functions of acoustic transmissions centered at 50 kHz over a 1-km horizontal underice path in the marginal ice zone (MIZ). The data were collected during the MIZEX '84 experiment as part of a feasibility study for an underwater acoustic telemetry link. It is shown that the acoustic fluctuations are dominated by a 10-Hz process conjectured due to the turbulent underice boundary layer. Significant fluctuation energy in the 0.1-Hz band was also observed. The two processes differ in frequency coherence characteristics. An underwater telemetry system designed for this channel will be dominated by the high-frequency fluctuations, but the slower process is capable of causing disastrous data losses unless its effects are anticipated. © 1990, Acoustical Society of America. All rights reserved.
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收藏
页码:185 / 190
页数:6
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