Modelling acoustic propagation under-ice in support of AUV missions in Antarctica ...

• Main Author: Alexander, P
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; Endeavour; Antarc*; Antarctica; aurora australis; Sea ice
• Online Access: https://dx.doi.org/10.25959/23233007; https://figshare.utas.edu.au/articles/thesis/Modelling_acoustic_propagation_under-ice_in_support_of_AUV_missions_in_Antarctica/23233007

This work identifes and investigates acoustic conditions relevant to ship based operation of Autonomous Underwater Vehicles (AUVs) under Antarctic sea ice. The principal objective of the project was to predict the detectability of acoustic status and emergency beacons used by AUVs in an Antarctic sea-ice deployment environment. The key acoustic issues identified were deployment noise, the inuence of water column and sea ice canopy properties on acoustic propagation, and the source and receiver locations. This work contributes to this endeavour in three ways: the first is the measurement of a noise profile of the Australian Antarctic Division's research and resupply vessel the Aurora Australis while parked in Antarctic sea ice; the second is an investigation of the influence of water column properties and sea ice roughness on signal propagation using acoustic modelling and simulation; and the third is the inclusion of field measured Antarctic water and ice data in acoustic models to assess variability and ...