RV Investigator Voyage IN2021_E02 EK60/EK80 Echosounder

This record describes scientific split-beam echosounder data collected on the RV Investigator voyage IN2021_E02, to calibrate and commission new, upgraded and existing critical equipment (with sea trials and personnel training) onboard RV Investigator for upcoming voyages in the 2021 schedule and beyond. The primary objectives for this voyage were testing the Deep Corer winch stream and respool, Trawling winch calibration, CTD winch 1 & 2 calibrations, HOTS commissioning and Heave Compensation testing, and Deep Towed Camera trial and calibration. The voyage took place between November 20 and November 28, 2021, departing from Hobart (TAS) and returning to Hobart.The Simrad EK60 split beam echosounders for 18kHz and Simrad EK80 split beam echosounders for 38, 70 120, 200 and 333 kHz were used to acquire acoustic backscatter data to a range of 1500 m, around east of Tasmania and near Freycinet Marine Park. All frequencies were logged continuously for the extent of the voyage, except 70kz which was set to passive in shallow environments.Data are stored in *.raw, *.bot and *.idx format at CSIRO. There are 488 files totalling 11.5 GB of raw data in this dataset.No 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.

本记录描述了RV Investigator（“调查者”号科考船）航次IN2021_E02所采集的科学级分裂波束回声测深仪（split-beam echosounder）数据，用于校准、调试该船上的新研、升级及现有关键设备（含海上试验与人员培训），以支撑2021年及后续计划航次的开展。本次航次的核心目标包括：深海取样器绞车缆绳及重新绕缆测试、拖网绞车校准、温盐深（CTD）绞车1号与2号校准、HOTS系统调试、升沉补偿测试，以及深拖摄像系统的试验与校准。本次航次于2021年11月20日至11月28日开展，从塔斯马尼亚州霍巴特港出发并返回霍巴特。本次航次使用18 kHz频段的Simrad EK60型分裂波束回声测深仪，以及38、70、120、200和333 kHz频段的Simrad EK80型分裂波束回声测深仪，在塔斯马尼亚州东部及弗雷西内特海洋公园附近海域采集了最大探测距离达1500米的声学背散射数据。本次航次全程连续记录所有频段的数据，仅70 kHz频段在浅水环境下设置为被动模式。数据以*.raw、*.bot和*.idx格式存储于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共包含488个文件，原始数据总容量达11.5 GB。本数据集未经过任何处理。本数据集的补充信息详见GSM数据采集与处理报告。额外的数据产品可根据申请提供。