DocumentCode :
2930524
Title :
Accuracy of acoustic multipath timing and ranging predictions over extended ranges
Author :
Coffey, Denis M. ; Paquette, Dale L.
Author_Institution :
Naval Underwater Systems Center, Newport, RI, USA
fYear :
1985
fDate :
12-14 Nov. 1985
Firstpage :
480
Lastpage :
489
Abstract :
An at-sea experiment was conducted to verify a long range acoustic timing and ranging concept. A spread spectrum signal was transmitted and received at ranges of 1 to 75 nautical miles. Processing this data gave thousands of multipaths profiles which were compared with profiles generated by existing long range acoustic propagation models. Agreement between the models and the experimental data was inconsistent throughout the test geometry. Hydrophone array receivers were suspended atdepths of 2500, 3750 and 4750 meters during the test. The frequency band of interest was 850 to 1325 Hertz. The results of this paper show that long range acoustic performance cannot always be predicted with current modeling techniques. New technologies and modeling concepts are needed to raise the accuracy and reliability of predicted performance.
Keywords :
Acoustic propagation; Acoustic reflection; Acoustic refraction; Correlators; Detectors; Sea surface; Surface acoustic waves; Target tracking; Time measurement; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
OCEANS '85 - Ocean Engineering and the Environment
Conference_Location :
San Diego, CA, USA
Type :
conf
DOI :
10.1109/OCEANS.1985.1160140
Filename :
1160140
Link To Document :
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