RV Investigator Voyage IN2016_v03 EK60 Echosounder

This record describes scientific split-beam echosounder data collected on the RV Investigator voyage IN2016_V03, 'Monitoring Ocean Change and Variability along 170° W from the ice edge to the equator', which departed Hobart on the 26 April 2016 and returned to Lautoka, Fiji on the 30 June 2016. There was a port call at Wellington, New Zealand, 26 - 27 May for some science personnel change; this resulted in two "legs" of the voyage therefore Leg 1 is 26 April - 26 May 2016, and Leg 2 27 May - 30 June 2016.During Leg 1 the EK60 was predominately set to passive on all frequencies except for the 18 kHz which was run to full ocean depth as redundancy to the EM122 depth for CTD casts. The EK60 was also turned on with each individual frequency during transit to thoroughly test the interaction between the individual frequencies of EK60 and each of the ADCP’s. The EK60 was not run at all on Leg 2 as it was thought that it could cause interference with the ADCP data.Data are stored in *.raw, *.bot and *.idx format at CSIRO. There are 1494 files totalling 63.1 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.本记录描述的是“调查者号”（RV Investigator）科考航次IN2016_V03期间采集的科学用分裂波束回声测深仪（split-beam echosounder）数据，该航次主题为“沿170°W从冰缘至赤道监测海洋变化与变率”，于2016年4月26日从霍巴特启航，2016年6月30日返回斐济劳托卡。本次航次曾于2016年5月26日至27日在新西兰惠灵顿进行靠港作业，以完成部分科研人员轮换，因此整个航次划分为两个航段：航段1为2016年4月26日至5月26日，航段2为2016年5月27日至6月30日。在航段1作业期间，EK60除18 kHz频段外，其余所有频段均设置为被动模式；其中18 kHz频段以全海深模式运行，作为EM122测深系统在温盐深剖面仪（Conductivity Temperature Depth），简称CTD测量时的冗余备份。此外，在航行过程中，EK60的各独立工作频段均被开启，以全面测试EK60各频段与各声学多普勒流速剖面仪（Acoustic Doppler Current Profiler），简称ADCP之间的交互性能。而航段2期间未启用EK60，因当时评估认为其可能对ADCP数据采集造成电磁干扰。本数据集的数据以*.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），简称CSIRO，共计1494个文件，总原始数据量达63.1 GB，且尚未经过任何后期处理。本数据集的补充技术信息收录于GSM数据采集与处理报告中，额外的数据产品可根据申请提供。