2019_programme: REVERBERATION MODEL-DATA COMPARISONS AND ESTIMATED SCATTERING STRENGTHS IN THE VICINITY OF THE TREX13 SITE

• Session: 20. Sonar performance modeling and verification. Applications to active and passive sonar
  Organiser(s): Colin Mathieu, Prior Mark, Heaney Kevin, Ellis Dale
• Lecture: REVERBERATION MODEL-DATA COMPARISONS AND ESTIMATED SCATTERING STRENGTHS IN THE VICINITY OF THE TREX13 SITE
  Paper ID: 915
  Author(s): Ellis Dale , Yang Jie
  Presenter: Ellis Dale
  Presentation type: oral
  Abstract: During the 2013 Target and Reverberation Experiment (TREX13) reverberation and target echo data were collected using a fixed source and fixed horizontal array deployed in shallow water in the Gulf of Mexico. Various pulses in the 1.8 to 3.6 kHz frequency band were sent, day and night over a 4-week period, and an extensive analysis of the reverberation data and environmental measurements made. Results by various authors were collected in the recent TREX13 Special Issue of the IEEE Journal of Oceanic Engineering. Ellis et al. used a normal-mode Reverberation and Target Echo model [IEEE JOE, 42, 344-361, 2017] to perform model-data comparisons and extract a scattering strength (based on Lambert’s rule) along the relatively-flat Reverberation Track. The beams of the horizontal array, can be steered at all azimuths, so in this paper we look at model-data comparisons along other radials, using a different scattering function. As well as propagation effects, the model takes into consideration the frequency and angular dependence of the beam patterns, so an estimate of the range and azimuthal dependence of the scattering can be extracted. Scattering anomalies point to regions where additional environmental measurements would be worthwhile. [Work supported by the US Office of Naval Research, Code 322 Ocean Acoustics.]
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• Corresponding author: Dr Ellis Dale
  Affiliation: Mount Allsion University
  Country: Canada
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