Wideband synthetic aperture sonar backprojection with maximization of wave number domain support

Stig A. V. Synnes, Alan J. Hunter, Roy E. Hansen, Torstein O. Sæbø, Hayden J. Callow, Robbert van Vossen, Andreas Austeng

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
195 Downloads (Pure)

Abstract

Wideband and widebeam synthetic aperture sonar (SAS) can provide information on the frequency- and aspect-dependent scattering in a scene. We suggest an approach to predict the quality of the sensor data over the available frequencies and aspect angles. We relate the typical spatial domain quality metrics to their wave number domain (WD) counterpart, and use these to map the data quality in WD. Because SAS arrays often are undersampled along-track, we pay particular attention to data degradation from aliasing. We use the proposed approach to examine how three SAS image formation algorithms based on time domain backprojection (TDBP) access data of different quality from wideband SAS systems. We illustrate the results with predictions for a generic SAS design and demonstrate the findings on two experimental systems. We observe that the maximum support of high-quality data is achieved through BP onto a high-resolution grid followed by WD filtering.
Original languageEnglish
Pages (from-to)880-891
JournalIEEE Journal of Oceanic Engineering
Volume42
Issue number4
Early online date10 Nov 2016
DOIs
Publication statusPublished - 11 Oct 2017

Fingerprint Dive into the research topics of 'Wideband synthetic aperture sonar backprojection with maximization of wave number domain support'. Together they form a unique fingerprint.

Cite this