CCS - MV Bluefin 2020 V01 Bioacoustics

This bio-acoustic data was collected during a December 2020 voyage on the Australian Maritime College training vessel MV Bluefin as part of the Carbon Capture and Storage project. The survey was conducted in the nearshore of the Gippsland region. See voyage report MV Bluefin 202001 Voyage Summary.docx for detailed overview of the voyage.\n\nSimrad 120 kHz bio-acoustic water column and seafloor backscatter + experimental gas-seep detection multibeam\n\nSimrad 120 kHz echosounders are part of the Bluefin’s installed instrument suite. Simrad 38 kHz was installed but not used as ws interfering with Kongsberg EM2040 multibeam. An experimental multibeam system was used on this voyage. This comprised four 28 degree transducers that were powered by 200 kHz WBT Transceiver. A custom built multiplexer was used to cycle through the four transducers. This system was used to conduct experiments with a gas-release system on the seafloor to assess utility of the system to detect the release. Data was acquired using Simrad EK80 Version 1.12 software logging at EK60 resolution. Acoustic data were recorded in UTC time. UTC offset would be 10 hrs. \nEchosounder details\n\nEchosounder | Frequency | Mode | Transceiver Serial no | Transducer Model & serial No | Comments\nSimrad EK60 | 38 kHz | CW | - | ES38B, SN30333 | Not operated as was interfering with EM2040 multibeam\nSimrad EK60 | 120 kHz | CW | - | ES120-7C, 120\t| \nSimrad WBT Tube | 200 kHz | CW | - | 253687 | ES200-28. | Custom four transducer pseudo multibeam head \n\nSurvey settings:\n\nFrequency (kHz) | Power | Pulse duration (ms) | Logging Range (m)\n\n120 | 125 | 1.024 | 30\n105 | 45 | 1.024 | 30\n\nCalibration Information:\n\nBio-acoustic system was calibrated using the standard sphere method for survey settings on 14th of August 2020 at CCS study site. See separate calibration report for details\n\n

本生物声学（bio-acoustic）数据集采集于2020年12月的一次航行任务中，搭载平台为澳大利亚海事学院（Australian Maritime College）训练船MV Bluefin，本项目隶属于碳捕获与封存（Carbon Capture and Storage，CCS）研究计划。本次调查作业开展于吉普斯兰（Gippsland）区域近岸海域。详细航行概况请参阅航行报告《MV Bluefin 202001 Voyage Summary.docx》。

采集数据包含Simrad 120 kHz生物声学水体与海底背散射数据，以及用于天然气渗漏检测的实验性多波束系统数据。

Simrad 120 kHz回声测深仪为MV Bluefin号搭载的标准仪器套件之一。Simrad 38 kHz回声测深仪虽已完成安装，但未投入实际使用，因其会对Kongsberg EM2040多波束系统造成信号干扰。

本次航行搭载了一套实验性多波束系统，该系统由4台28度换能器组成，由200 kHz WBT收发机供电，并通过定制多路复用器实现4台换能器的循环切换。本系统用于开展海底气体释放系统相关实验，以评估该系统用于气体泄漏检测的实用性。数据采集使用Simrad EK80 Version 1.12版本软件，以EK60分辨率进行日志记录。声学数据采用协调世界时（UTC）记录，时区偏移量为10小时。

回声测深仪参数详情
回声测深仪 | 工作频率 | 工作模式 | 收发机序列号 | 换能器型号及序列号 | 备注
Simrad EK60 | 38 kHz | 连续波（CW） | - | ES38B, SN30333 | 未投入使用，因其会对EM2040多波束系统造成干扰
Simrad EK60 | 120 kHz | 连续波（CW） | - | ES120-7C, 120 |
Simrad WBT Tube | 200 kHz | 连续波（CW） | - | 253687 | ES200-28 | 定制4换能器伪多波束探头

调查设置
工作频率（kHz） | 发射功率 | 脉冲宽度（ms） | 记录量程（m）
120 | 125 | 1.024 | 30
105 | 45 | 1.024 | 30

校准信息
本生物声学系统已于2020年8月14日，在CCS研究海域采用标准球体法，针对本次调查设置完成校准。详细校准信息请参阅独立发布的校准报告。