CCS - Saildrone SD1008 2018 V1 bioacoustic data

The WBT Mini echosounders were installed by Saildrone in San Francisco in November 2017 on two platforms – SD1007, SD1008. CSIRO staff worked with Saildrone to ensure correct operation and develop low pass filters that significantly improved noise performance. The platforms were tested in-water in San Francisco bay. A rudimentary calibration was make by suspending a reference sphere of known reflectivity beneath the transducers. The calibration was not exhaustive as this was done in a high current situation in less than ideal depths but served to confirm that the echosounders were operating correctly. The commissioning calibration was followed up with a comprehensive calibration of the acoustic systems in Hobart on the 24th and 26th of March (section 2.3.1). Sea trials were conducted in December 2017 open waters adjacent to San Francisco (Section 3.1). On March 28th the Saildrones commenced an extended trail heading from Hobart along the eastern seaboard of mainland Australia. Data were recorded using the internal ‘autonomous mode’ logging module that

2017年11月，Saildrone公司于旧金山将两台WBT Mini型回声测深仪（WBT Mini echosounders）安装至SD1007、SD1008两个平台。澳大利亚联邦科学与工业研究组织（CSIRO）工作人员与Saildrone团队协作，保障设备正常运行，并开发了可显著优化噪声性能的低通滤波器（low pass filters）。该平台于旧金山湾开展了水下工况测试。研究人员将已知反射率的参考球悬挂于换能器（transducers）下方，完成了初步校准。本次校准并非全面彻底：测试在大流速且水深未达理想状态的环境下开展，但仍足以验证回声测深仪运行正常。本次调试校准完成后，研究团队于3月24日与26日在霍巴特对声学系统开展了全面校准（详见2.3.1节）。2017年12月，团队在旧金山附近的开阔海域开展了海上试验（详见3.1节）。3月28日，无人帆翼艇从霍巴特出发，沿澳大利亚大陆东海岸开展长距离试航；数据通过内置的“自主模式”记录模块（autonomous mode logging module）进行采集，