NDLI: Characteristics of surface reflective path in acoustic channel with sinusoidal moving surface

Content Provider	IEEE Xplore Digital Library
Author	Youngmin Choo Woojae Seong
Copyright Year	2011
Description	Author affiliation: Department of Naval Architecture and Ocean Engineering, Seoul National University, Korea (Youngmin Choo; Woojae Seong)
Abstract	Sea-surface movement induces the Doppler shift in acoustic signals propagating in the ocean and it also affects coherent propagation. For an observation of moving surface effect on acoustic channel, an experiment is conducted in the towing tank at Seoul National University. The delay time of single surface bounce path from the measurement data shows periodic time dependency, which is caused by the periodic sinusoidal surface. The ray-based propagation model is used to analyze the effect of moving surface. It is applied to the experimental environment and its results are compared with the measurement data. The difference between delay times of single surface bounce path from the model and measurement data are within the error caused by arrangement of source and receiver. Using the model, the delay times of single surface bounce path are observed according to source depth and surface wave height to investigate the effect of moving sinusoidal surface. As source depth or surface wave heights increases, the maximum path length difference of single surface bounce path increases. Thus, the frequency shift due to surface movement increases with increasing source depth and surface wave height.
Starting Page	1
Ending Page	5
File Size	1204868
Page Count	5
File Format	PDF
ISBN	9781457714276
e-ISBN	9780933957398
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Sea surface Surface acoustic waves Delay Sea measurements Trajectory
Content Type	Text
Resource Type	Article

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