TY - JOUR
T1 - Multipath broadband localization, bathymetry, and sediment inversion
AU - Michalopoulou, Zoi Heleni
AU - Gerstoft, Peter
N1 - Funding Information:
Manuscript received August 27, 2018; revised November 19, 2018; accepted January 22, 2019. Date of publication March 19, 2019; date of current version January 13, 2020. This work was supported by the U.S. Office of Naval Research under Grant N000141612485, Grant N000141812125, and Grant N000141812118. (Corresponding author: Zoi-Heleni Michalopoulou.) Guest Editor: D. Knobles. Z.-H. Michalopoulou is with the Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, NJ 07102 USA (e-mail:, michalop@ njit.edu). P. Gerstoft is with the University of California San Diego, La Jolla, CA 92093-0238 USA (e-mail:,gerstoft@ucsd.edu). Digital Object Identifier 10.1109/JOE.2019.2896681
Publisher Copyright:
© 1976-2012 IEEE.
PY - 2020/1
Y1 - 2020/1
N2 - Transmission of linearly frequency modulated pulses generates receptions at a vertical line array that can be cross correlated with the source signal to provide estimates of the oceanic waveguide impulse response. For short ranges, distinct path arrivals can be identified including the direct, surface reflection, bottom reflection, and sediment reflection. Accurate estimation of arrival times of such paths is tightly related to successful inversion for source location and water column depth and sound speed and, subsequently, estimation of sediment sound speed and thickness. To achieve accurate estimation, particle filtering is applied to the received time series at 16 phones combined with a simple cross-correlation method. Using linearization, arrival time probability density functions are connected to the geometry and water column sound-speed parameters, providing point estimates as well as probability densities. These are then employed in sediment sound speed and thickness estimation. The results, obtained from the application of the method to data collected during the Seabed Characterization Experiment, are consistent with prior information on the site.
AB - Transmission of linearly frequency modulated pulses generates receptions at a vertical line array that can be cross correlated with the source signal to provide estimates of the oceanic waveguide impulse response. For short ranges, distinct path arrivals can be identified including the direct, surface reflection, bottom reflection, and sediment reflection. Accurate estimation of arrival times of such paths is tightly related to successful inversion for source location and water column depth and sound speed and, subsequently, estimation of sediment sound speed and thickness. To achieve accurate estimation, particle filtering is applied to the received time series at 16 phones combined with a simple cross-correlation method. Using linearization, arrival time probability density functions are connected to the geometry and water column sound-speed parameters, providing point estimates as well as probability densities. These are then employed in sediment sound speed and thickness estimation. The results, obtained from the application of the method to data collected during the Seabed Characterization Experiment, are consistent with prior information on the site.
KW - Geoacoustic inversion
KW - linearization
KW - particle filter
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U2 - 10.1109/JOE.2019.2896681
DO - 10.1109/JOE.2019.2896681
M3 - Article
AN - SCOPUS:85063405700
SN - 0364-9059
VL - 45
SP - 92
EP - 102
JO - IEEE Journal of Oceanic Engineering
JF - IEEE Journal of Oceanic Engineering
IS - 1
M1 - 8669831
ER -