RV Investigator Voyage IN2021_E04 ADCP Data

This record describes the Acoustic Doppler Current Profiler (ADCP) data collected from the Marine National Facility RV Investigator voyage IN2021_E04, titled "Trials & Calibrations." The voyage took place between December 15, 2021 and December 20, 2021 (AEST), departing from Hobart and returning to Hobart. Data was collected during IN2021_E04 for sections of the voyage. Data was collected using UHDAS and post-processed using CODAS.The RDI Ocean Surveyor 150kHz ADCP (os150) was run in broadband with 4m bins from the start of the voyage, while in relatively shallow water, from 2021-12-14 22:12Z. The OS150 was turned off at 2021-12-15 21:17Z to avoid interference with other sounders data that were being collected. From 2021-12-16 10:50Z both the os150 and the RDI Ocean Surveyor 75kHz ADCP (os75) were run in narrowband with 8m bins. The os75 was switch off at 2021-12-19 21:10Z as the vessel entered shallower water. The os150 was switched off at the end of the voyage at 2021-12-19 12:45Z.Internal triggering was used.The drop keel was ‘flush with the gondola’ at 1.19m below the waterline for the duration of the voyage.This dataset was processed (quality-controlled), and then archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).本记录详述了澳大利亚海洋国家设施「调查者号」（RV Investigator）科考船航次IN2021_E04中采集的声学多普勒海流剖面仪（Acoustic Doppler Current Profiler, ADCP）数据，该航次主题为「试验与校准」。本次航次于2021年12月15日至2021年12月20日（澳大利亚东部标准时间）开展，往返霍巴特港。数据采集工作覆盖该航次的部分航段，采用UHDAS系统完成数据采集，后经CODAS软件进行后处理。 RDI Ocean Surveyor 150kHz ADCP（os150）自航次起始阶段便以宽带模式运行，采样分箱尺寸为4米，该时段作业水域相对较浅，时间范围为2021-12-14 22:12Z（世界协调时）起。该设备于2021-12-15 21:17Z关机，以避免对同期采集的其他测深仪数据造成干扰。2021-12-16 10:50Z起，os150与RDI Ocean Surveyor 75kHz ADCP（os75）均以窄带模式运行，采样分箱尺寸为8米。os75于2021-12-19 21:10Z关机，彼时船舶驶入更浅水域。os150则于航次结束前关机，时间为2021-12-19 12:45Z。本次数据采集采用内部触发模式。 本航次全程，下放龙骨均保持与设备吊舱齐平状态，其安装位置为水线以下1.19米处。本数据集已完成处理与质量控制，并由澳大利亚联邦科学与工业研究组织（CSIRO）国家海洋设施与馆藏（NCMI）信息与数据中心（IDC）完成归档。