scholarly journals Broadband matched‐field source localization with a horizontal line array in shallow water

1995 ◽  
Vol 97 (5) ◽  
pp. 3291-3291
Author(s):  
W. S. Hodgkiss ◽  
J. J. Murray ◽  
K. H. Kim ◽  
G. L. D’Spain
Keyword(s):  
Shallow Water ◽  
Source Localization ◽  
Horizontal Line ◽  
Field Source ◽  
Line Array

MATCHED FIELD SOURCE LOCALIZATION WITH A HORIZONTAL LINE ARRAY

1994 ◽  
Vol 02 (03) ◽  
pp. 315-325
Author(s):  
N. R. CHAPMAN ◽  
M. L. YEREMY
Keyword(s):  
Source Localization ◽  
Sound Speed ◽  
Water Environment ◽  
Horizontal Line ◽  
Speed Profile ◽  
Field Source ◽  
Sound Speed Profile ◽  
Line Array ◽  
Localization Performance ◽  
Experimental Geometry

Matched field source localization performance is investigated for a source in aft endfire of a horizontal line array operating in a deep water environment. Simulations are used to investigate the performance for ideal conditions and in the presence of noise. In particular, the effects of uncertainty in experimental geometry and mismatch in sound speed profile are considered. It is shown that the performance is sensitive to the vertical tilt of the array for relatively small tilt angles of less than 5º. However, the horizontal array is robust to mismatch in the gradient of the sound speed profile at the bottom of the water column. The results of the simulations are interpreted in terms of the characteristics of acoustic propagation in the environment.

Sound speed profile inversion using a horizontal line array in shallow water

2014 ◽  
Vol 58 (1) ◽  
pp. 1-7 ◽  
Author(s):  
ZhengLin Li ◽  
Li He ◽  
RenHe Zhang ◽  
FengHua Li ◽  
YanXin Yu ◽  
...  
Keyword(s):  
Shallow Water ◽  
Sound Speed ◽  
Horizontal Line ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Line Array ◽  
Profile Inversion

scholarly journals Matched-field Source Localization with a Mobile Short Horizontal Linear Array in Offshore Shallow Water

2013 ◽  
Vol 38 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Dexin Zhao ◽  
Zhiping Huang ◽  
Shaojing Su ◽  
Ting Li
Keyword(s):  
Shallow Water ◽  
Source Localization ◽  
Linear Array ◽  
Autonomous Underwater Vehicles ◽  
Field Source ◽  
Position Errors ◽  
Straight Line ◽  
Synthetic Test ◽  
Passive Source Localization ◽  
Localization Performance

Abstract Passive source localization in shallow water has always been an important and challenging problem. Implementing scientific research, surveying, and monitoring using a short, less than ten meter long, horizontal linear array has received considerable attention in the recent years. The short array can be conveniently placed on autonomous underwater vehicles and deployed for adaptive spatial sampling. However, it is usually difficult to obtain a sufficient spatial gain for localizing long-range sources due to its limited physical size. To address this problem, a localization approach is proposed which is based on matched-field processing of the likelihood of the passive source localization in shallow water, as well as inter-position processing for the improved localization performance and the enhanced stability of the estimation process. The ability of the proposed approach is examined through the two-dimensional synthetic test cases which involves ocean environmental mismatch and position errors of the short array. The presented results illustrate the localization performance for various source locations at different signal- to-noise ratios and demonstrate the build up over time of the positional parameters of the estimated source as the short array moves at a low speed along a straight line at a certain depth.

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