7cfb77a5-f8b7-4045-bd71-eb8cb4de2392 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-11-17T07:24:59 creation ISO 19115 2016 BROKE-West active acoustic data workflow 7cfb77a5-f8b7-4045-bd71-eb8cb4de2392 The attached file details the workflow for the processing and analysis of active acoustic data (Simrad EK60; 12, 38, 120 and 200 kHz) collected from RSV Aurora Australis during the 2006 BROKE-West voyage. The attached file is in Echoview(R) (https://www.echoview.com/) version 8 format. The Echoview file is suitable for working with fisheries acoustics, i.e. water column backscatter, data collected using a Simrad EK60 and the file is set-up to read 38, 120 and 200 kHz split-beam data. The file has operators to remove acoustic noise, e.g. spikes and dropped pings, and operators for removing surface noise and seabed echoes. Echoes arising from krill are isolated using the ‘dB-difference’ method recommended by CCAMLR. The Echoview file is set-up to export the results of krill echo integration as both intervals and swarms. Full details of the method are available in Jarvis et al. (2010) and the krill swarms methods are described in Bestley et al. (2017). {"type": "Polygon", "coordinates": [[[30.0, -70.0], [80.0, -70.0], [80.0, -52.0], [30.0, -52.0], [30.0, -70.0]]]} 30.0 80.0 -70.0 -52.0 ACOUSTICS AMD AMD/AU CEOS CONTINENT > ANTARCTICA EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHA EARTH SCIENCE > OCEANS > AQUATIC SCIENCES > FISHERIES EARTH SCIENCE > OCEANS > OCEAN ACOUSTICS > ACOUSTIC SCATTERING ECHO SOUNDERS ECHOVIEW EK60 GEOGRAPHIC REGION > POLAR HYDROACOUSTICS OCEAN > SOUTHERN OCEAN R/V AA > R/V Aurora Australis GET DATA documentDigital Download the dataset HTML PROJECT HOME PAGE documentDigital Public information for AAS project 4050 HTML VIEW RELATED INFORMATION documentDigital Citation reference for this metadata record and dataset. HTML VIEW RELATED INFORMATION > GENERAL DOCUMENTATION documentDigital Echoview website HTML Creative Commons by Attribution logo documentDigital PNG