RV Investigator Voyage IN2021_V02 EK80/EK60 Echosounder

This record describes scientific split-beam echosounder data collected on the RV Investigator voyage IN2021_V02 (SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania), which departed Hobart on the 14th April 2021 and returned to Hobart on the 28th April 2021. The Simrad EK80 wide band transceivers (WBT) 38, 70, 120, 200 and 333 kHz, as well as the EK60 split-beam GPT 18kHz were used to acquire acoustic backscatter data to a range of 1500 m, during the voyage. All frequencies were logged sporadically (only when transiting) for the extent of the voyage. The frequencies were set to passive for the periods when stationary during the voyage. Data are stored in *.raw, *.bot and *.idx format at CSIRO. There are 422 files totalling 40.6 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.

本数据集记录了“探索者号”科考船（RV Investigator）航次IN2021_V02采集的科学级分裂波束回声测深仪（split-beam echosounder）数据。该航次的任务为部署南大洋时间序列（Southern Ocean Time Series, SOTS）自动锚泊系统，用于塔斯马尼亚西南部海域的气候与碳循环研究，航次于2021年4月14日从霍巴特启航，同年4月28日返回霍巴特。
本航次搭载Simrad EK80宽波段收发器（WBT）的38、70、120、200及333 kHz频段设备，以及EK60型分裂波束GPT 18 kHz设备，采集了量程达1500米的声学背散射数据。
整个航次期间，所有观测频段仅在航行过境时段被间歇性记录；当科考船处于停泊静止状态时，所有频段均设置为被动工作模式。
本数据集的原始数据以*.raw、*.bot及*.idx格式存储于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO），共包含422个文件，总原始数据容量达40.6 GB，且未经过任何处理。
有关本数据集的更多详细信息，请参阅《GSM数据采集与处理报告》；额外衍生数据产品可根据申请提供。