Broadband dataset example collected with a WBAT
|Author(s)||Barbin Laure1, Habasque Jeremie2|
|Affiliation(s)||1 : Institut de Recherche pour le Développement, UMR ENTROPIE, IRD, Univ Réunion, CNRS, Nouméa, Nouvelle-Calédonie
2 : Institut de Recherche pour le Développement, UMR LEMAR, IRD de Bretagne, BP70 29280 Plouzané, FRANCE
|Keyword(s)||ACOUSTICS, PACIFIC OCEAN, MICRONEKTON|
This dataset contains broadband acoustic data collected with scientific echosounders in the West Pacific between Nouméa and Micronesian Islands during Warmalis 1 cruise performed onboard the French R/V ALIS in 2021 in the framework of the program «MICROPAC».
|Acknowledgements||We want to acknowledge R/V ALIS crews that made the survey possible.|
A self-contained scientific echosounder system (SIMRAD Wide-Band Autonomous Transceiver (WBAT); SIMRAD Kongsberg Maritime AS, Horten, Norway) was equipped with two split-beam transducers SIMRAD EK80 facing downwards, operating at a frequency range of 35-45 kHz (ES38-18DK-Split) and 90-170 kHz (ES120-7CD). The two transducers transmitted alternately by periods of 1 minute at ping interval of 0.3 seconds, with a pulse length of 1024 µsec. The transmitted power was 338 and 200W for 38 kHz and 120 kHz, respectively, for a range of 40m. The WBAT was hauled vertically between 0 to 500m at descent rate of 1m.s-1 during an average duration of 40 minutes at measurement stations. The WBAT was equipped with a CTD sensor to record the pressure.
This dataset presents fisheries acoustic data in both proprietary Simrad RAW format and international HAC format recorded on 19/09/2021 between 07:31 and 08:16 UTC.