scholarly journals Effects of internal waves on low frequency, long range, acoustic propagation in the deep ocean

2007 ◽  
Author(s):  
Jinshan Xu
Keyword(s):  
Long Range ◽  
Internal Waves ◽  
Low Frequency ◽  
Deep Ocean ◽  
Acoustic Propagation

scholarly journals Observations of low-frequency, long-range acoustic propagation in the Philippine Sea and comparisons with mode transport theory

2020 ◽  
Vol 147 (2) ◽  
pp. 877-897
Author(s):  
Tarun K. Chandrayadula ◽  
Sivaselvi Periyasamy ◽  
John A. Colosi ◽  
Peter F. Worcester ◽  
Matthew A. Dzieciuch ◽  
...  
Keyword(s):  
Long Range ◽  
Transport Theory ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
Philippine Sea

Long‐range low‐frequency CW propagation in the deep ocean: Antigua‐Newfoundland

1974 ◽  
Vol 56 (1) ◽  
pp. 58-69 ◽  
Author(s):  
A. N. Guthrie ◽  
R. M. Fitzgerald ◽  
D. A. Nutile ◽  
J. D. Shaffer
Keyword(s):  
Long Range ◽  
Low Frequency ◽  
Deep Ocean

scholarly journals The Underway Conductivity–Temperature–Depth Instrument

2007 ◽  
Vol 24 (11) ◽  
pp. 1910-1923 ◽  
Author(s):  
Daniel L. Rudnick ◽  
Jochen Klinke
Keyword(s):  
Long Range ◽  
Internal Waves ◽  
Pressure Sensor ◽  
Hazardous Materials ◽  
Acoustic Propagation ◽  
Left Behind ◽  
Design Goal ◽  
The Cost ◽  
Temperature Depth

Abstract The development of the Underway Conductivity–Temperature–Depth (UCTD) instrument is motivated by the desire for inexpensive profiles of temperature and salinity from underway vessels, including volunteer observing ships (VOSs) and research vessels. The UCTD operates under the same principle as an expendable probe. By spooling tether line both the probe and a winch aboard ship, the velocity of the line through the water is zero, the line drag is negligible, and the probe can get arbitrarily deep. Recovery is accomplished by reeling the line back in. Recovering the UCTD has some advantages: 1) the cost per profile decreases with increasing use, 2) sensors can be calibrated postdeployment, 3) the UCTD carries a pressure sensor so depth is measured directly, and 4) no hazardous materials are left behind. The design goal for the UCTD was to obtain profiles deeper than 100 m at 20 kt (typical of a VOS). This goal has been surpassed, as it is able to profile to over 150 m at 20 kt and to over 400 m at 10 kt. The first operational use of the UCTD occurred during a May–June 2004 cruise, the purpose of which was to examine the effect of internal waves and spice on long-range acoustic propagation. Over 160 UCTD casts were completed, resulting in a hydrographic section with resolutions of 10 km horizontally and 5 m vertically.

Long‐range low frequency shallow water acoustic propagation and bottom penetration experiments for underwater unexploded ordinance.

2009 ◽  
Vol 125 (4) ◽  
pp. 2734-2734
Author(s):  
Harry J. Simpson ◽  
Mike L. Saniga ◽  
Brian H. Houston ◽  
Alain R. Berdoz ◽  
Philip Frank ◽  
...  
Keyword(s):  
Shallow Water ◽  
Long Range ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
Unexploded Ordinance

Effect of ocean internal waves on the interference component of the acoustic field in the Long-range Ocean Acoustic Propagation Experiment

2007 ◽  
Vol 122 (5) ◽  
pp. 3005
Author(s):  
Natalie S. Grigorieva ◽  
Gregory M. Fridman ◽  
James Mercer ◽  
Rex Andrew ◽  
Bruce Howe ◽  
...  
Keyword(s):  
Long Range ◽  
Internal Waves ◽  
Acoustic Field ◽  
Acoustic Propagation ◽  
Interference Component ◽  
Propagation Experiment
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