Passive Acoustic Tracking of Minke Whales
Final rept. Dec 2009-Sep 2010
HAWAII UNIV HONOLULU
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This project developed model-based 3D passive acoustic tracking methods for minke whales. It was conducted in support of ONR Award N000140910489 in which T. Norris Bio-Waves conducted visual surveys at PMRF and S. Martin SPAWAR collected acoustic data on the PMRF bottom-mounted hydrophones. In this project, these data were analyzed to detect, characterize, and track minke whale calls. A minke boing detector and 3D model-based tracker was implemented. Acoustically derived positions were compared with SPA WAR position estimates using the MM3 2D time-of-arrival tracking method. The MM3 2D tracker gave similar boing position estimates to the 3D model-based tracker. The localized boings were within the range for which direct paths exit and for which the constant-SSP TOA method used by MM3 2D is expected to give reasonable position estimates. The importance of using model-based tracking to get accurate position estimates increases with the range of the animal from the hydrophones, with hydrophone spacing, and with increasing complexity of sound speed profiles.