Dataset abstract These data consist of pre-processed echosounder observations in the Southern Ocean collected during the Antarctic Circumnavigation Expedition (ACE; Leg2-Leg3) using an EK60 GPT operating at 200 kHz. The instrument was calibrated at South Georgia during the expedition (Leg 3) and corrections were applied prior to calculation of the volume backscattering strength (Sv). The signal-to-noise ratio (SNR) was analysed and was deemed very poor at depths greater than 100 m. Therefore, only data collected between the transducer depth (8.4 m) and 100 m were archived. Dataset contents ACE-DYYYYMMDD-THHMMSS.csv, data files, comma-separated values data_file_header.txt, metadata, text README.txt, metadata, text Dataset license This 200 kHz pre-processed echosounder data collected on ACE is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/

{"references": ["Proud, R., Le Guen, C., Fernandes, P., Everson, I., Bernasconi, M., Lawrence, J. and Brierley, A. (2020). 200 kHz raw echosounder data collected on the Antarctic Circumnavigation Expedition during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. DOI: 10.5281/zenodo.", "https://www.echoview.com/products-services/news/important-echoview-8-update-for-simrad-ek80-users", "Proud, R., Le Guen, C., Fernandes, P., Everson, I., Bernasconi, M., Lawrence, J. and Brierley, A. (2020). 200 kHz raw echosounder data collected on the Antarctic Circumnavigation Expedition during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. DOI: 10.5281/zenodo.0"]}

The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.