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 language | English |
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Pages (from-to) | 880-891 |
Journal | IEEE Journal of Oceanic Engineering |
Volume | 42 |
Issue number | 4 |
Early online date | 10 Nov 2016 |
DOIs | |
Publication status | Published - 11 Oct 2017 |
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Alan Hunter
- Department of Mechanical Engineering - Deputy Head of Department: Workload and Wellbeing
- Water Innovation and Research Centre (WIRC)
- UKRI CDT in Accountable, Responsible and Transparent AI
Person: Research & Teaching