12.5 kHz raw echosounder data collected on the Antarctic Circumnavigation Expedition during the austral summer of 2016/2017.

Dataset abstract These data consist of raw echosounder observations collected during ACE (Leg1-Leg3) using an EK80 WBT operating at 12.5 kHz. The instrument was calibrated at South Georgia during the expedition (Leg 3) and corrections were applied prior to calculation of the volume backscattering st...

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Bibliographic Details
Main Authors: Proud, Roland, Le Guen, Camille, Fernandes, Paul, Everson, Inigo, Bernasconi, Matteo, Lawrence, Joshua, Brierley, Andrew
Format: Dataset
Language:English
Published: Zenodo 2019
Subjects:
echosounder
water column
EK80
Southern Ocean
Antarctica
Antarctic Circumnavigation Expedition
ACE
Antarctic
Austral
The Antarctic
Antarc*
Swiss Polar Institute
Online Access:https://dx.doi.org/10.5281/zenodo.3587678
https://zenodo.org/record/3587678
Description
Summary:Dataset abstract These data consist of raw echosounder observations collected during ACE (Leg1-Leg3) using an EK80 WBT operating at 12.5 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 1000 m. Therefore, only data collected between the transducer depth (8.4 m) and 1000 m were archived. Sv values within this depth range that had poor SNRs (<2) were deemed to be bad data and set to a value of NA. Observations were made using a pulse duration of 16.384 ms (c. 24 m) and are therefore not suitable for fine-scale studies (e.g. analysis of krill swarms). They are more suited to studies relating to large-scale biological features such as deep scattering layers. Dataset contents ACE-DYYYYMMDD-THHMMSS.csv, data files, comma-separated values data_file_header.txt, metadata, text README.txt, metadata, text : The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.

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