19–23 Jun 2023
Hofburg Palace & Online
Europe/Vienna timezone

Improvements to Hydroacoustic Processing Utilizing Three-Dimensional Ocean Acoustic Propagation

20 Jun 2023, 09:00


Board: 13
E-poster T1.3 The Oceans and their Properties Lightning talks: P1.3, P1.4, P5.2


Kevin Heaney (Applied Ocean Sciences)


In support of the Comprehensive Nuclear-Test-Ban Treaty, the International Monitoring System (IMS) has implemented a set of deep water open ocean hydroacoustic stations for monitoring (detecting and localization) any nuclear tests. As acoustic propagation satisfies the acoustic wave equation sound is subject to three-dimensional effects (refraction, diffraction, reflections) when in the presence of horizontal gradients due to bathymetry, oceanography or the presence of continents. The current processing system ignores these effects (using in-plane propagation for all acoustic paths) and has large error bars in azimuth for event association. In this work, a set of acoustic propagation codes are being used to integrate 3-D propagation into the automated event localization algorithm as well as into the IMS analyst work flow. A summary of the acoustic models as well as demonstrations of observed 3-D phenomenon for large underwater events will be presented as well as a programme plan to update the IMS processing approach.

Promotional text

Three-dimensional acoustics in hydroacoustic event processing.

E-mail [email protected]
Oral preference format in-person

Primary author

Kevin Heaney (Applied Ocean Sciences)


Emanuel Coelho (Applied Ocean Sciences) Mark Prior (TNO) Mr Tiago Oliveira (CTBTO Preparatory Commission) Mr Christos Saragiotis (CTBTO Preparatory Commission) Mario Zampolli (CTBTO Preparatory Commission) Mr Georgios Haralabus (CTBTO Preparatory Commission)

Presentation materials