Using ocean ambient noise for array self-localization and self-synchronization

Estimates of the travel times between the elements of a bottom hydrophone array can be extracted from the time-averaged ambient noise cross-correlation function (NCF). This is confirmed using 11-min-long data blocks of ambient noise recordings that were collected in May 1995 near the southern Califo...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of oceanic engineering 2005-04, Vol.30 (2), p.338-347
Main Authors: Sabra, K.G., Roux, P., Thode, A.M., D'Spain, G.L., Hodgkiss, W.S., Kuperman, W.A.
Format: Article
Language:English
Subjects:
Acoustic arrays
Acoustic noise
Acoustic sensors
Aerospace and Electronic Systems Society
Ambient noise
array element localization
cross-correlations
Frequency estimation
Frequency synchronization
inversion
Oceans
Sensor arrays
Sonar equipment
synchronization
Time domain analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Estimates of the travel times between the elements of a bottom hydrophone array can be extracted from the time-averaged ambient noise cross-correlation function (NCF). This is confirmed using 11-min-long data blocks of ambient noise recordings that were collected in May 1995 near the southern California coast at an average depth of 21 m in the 150-700 Hz frequency range. Coherent horizontal wavefronts emerging from the time derivative of the NCF are obtained across the array's aperture and are related to the direct arrival time of the time-domain Green's function (TDGF). These coherent wavefronts are used for array element self-localization (AESL) and array element self-synchronization (AESS). The estimated array element locations are used to beamform on a towed source.
ISSN:0364-9059
1558-1691
DOI:10.1109/JOE.2005.850908