NDLI: Effect of array tilt on estimates of vertical ambient noise spectrum

Content Provider	IEEE Xplore Digital Library
Author	Farrokhrooz, Mehdi Wage, Kathleen E.
Copyright Year	2015
Description	Author affiliation: Electrical and Computer Engineering Department, George Mason University, United States (Farrokhrooz, Mehdi; Wage, Kathleen E.)
Abstract	The vertical spectrum of ambient noise in the SOFAR channel carries useful information about noise sources and trapped modes in the channel. Measuring the directionality of low frequency ambient noise requires very long hydrophone arrays. Array motion can obscure the measurements of vertical spectra. This paper is motivated by the need to characterize the ambient noise spectrum using moored arrays such as those deployed in the North Pacific [1] and the Philippine Sea [2]. Using a straight-line model for array motion, this paper derives an approximate expression for the vertical spectrum measured by a tilted array. Analysis show that array tilt broadens the measured spectrum and reduces the noise notch at broadside. Numerical simulations using transport theory confirm the results.
Starting Page	1
Ending Page	6
File Size	743590
Page Count	6
File Format	PDF
ISBN	9780933957435
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Mathematical model Sonar equipment Numerical models Scattering Sea measurements Sea surface Monte Carlo methods
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Effect of array tilt on estimates of vertical ambient noise spectrum