RV Investigator Voyage IN2026_V01 EK80 Echosounder

Updated: 2026-03-24

This record describes scientific split-beam echosounder data collected on the RV Investigator voyage IN2026_V01, titled "Cook Ice Ecosystems and Sediments (COOKIES)." The voyage took place between January 02, 2026 and February 25, 2026 (AEST), departing from Hobart and returning to Hobart. The Simrad EK80 split beam echosounders for 18, 38, 70 120, 200 and (333) kHz were used to acquire acoustic backscatter data to a maximum range of 4500 m, around Antarctica and IMOS settings of 1500m for the transit legs. All frequencies were logged continuously for the extent of the voyage. The frequencies were all set to active for the whole period of the voyage. Data are stored in *.raw, *.bot and *.idx format at CSIRO. There are 2435 files totalling 231 GB of raw data in this dataset. No post-processing has been conducted on this data. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request.