Analysis of backscatter measurements from calibrated synthetic aperture sonar images

Peter D. Romaine, Derek R. Olson, J. Tory Cobb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Calibrated Synthetic Aperture Sonar (SAS) data can provide monostatic backscattering strength measurements as a function of grazing angle at high resolution. Motivated by an interest in obtaining invariant metrics from vehicle based sonar acquisition systems, an end-to-end processing methodology for recovering calibrated scattering cross section levels from seafloor swaths is presented. Calibrated SAS beamforming software developed for this work was based on the narrowband sonar equation and a delay-and-sum beamformer. Modern SAS processing techniques such as redundant phase center micronavigation, and an autofocus algorithm to estimate sound speed, were employed in the beamforming stage. Data from overlapping sections of seafloor acquired in the Gulf of Mexico during 2012 provide the basis for analysis of comparative scattering results, which are examined in an effort to demonstrate adherence to established acoustic principles.

Original languageEnglish (US)
Title of host publicationOCEANS 2019 MTS/IEEE Seattle, OCEANS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9780578576183
DOIs
StatePublished - Oct 2019
Event2019 OCEANS MTS/IEEE Seattle, OCEANS 2019 - Seattle, United States
Duration: Oct 27 2019Oct 31 2019

Publication series

NameOCEANS 2019 MTS/IEEE Seattle, OCEANS 2019

Conference

Conference2019 OCEANS MTS/IEEE Seattle, OCEANS 2019
CountryUnited States
CitySeattle
Period10/27/1910/31/19

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Ocean Engineering
  • Acoustics and Ultrasonics
  • Fluid Flow and Transfer Processes
  • Oceanography

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