Azimuth ambiguities in broadside and squint mode synthetic aperture sonar

R. McHugh, S. Shaw, N. Taylor

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Synthetic aperture sonar (SAS) mapping rates are limited by acoustic propagation speed in relation to feasible platform velocity and the desired swath coverage. Such limitations result in azimuth undersampling and the appearance of ambiguities in SAS imagery. The position, spreading and ambiguity to signal ratio (ASR) of image aliases caused by grating lobes are discussed from a geometric and a Doppler point of view. Simulation and experimentation for sidelooking SAS imaging show the variation in ASR with along track sampling, processed aperture, target range, and transmitted signal bandwidth. ASR is also shown to improve with increasing SAS squint angle considered up to 60° from broadside.

Original languageEnglish
Pages (from-to)113-119
Number of pages7
JournalIEE Proceedings - Radar, Sonar and Navigation
Issue number2
Publication statusPublished - 1999


Dive into the research topics of 'Azimuth ambiguities in broadside and squint mode synthetic aperture sonar'. Together they form a unique fingerprint.

Cite this