RV Investigator Voyage IN2017_T02 EM710 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_T02, 'Collaborative Australian Postgraduate Sea Training Alliance Network (CAPSTAN): Training the Next Generation of Marine Scientists'. The voyage took place between November 14 and November 26, 2017 departing from Fremantle (WA) and arriving in Hobart (TAS). The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information. A total of 1,711 km was covered, primarily used for mapping the continental shelf and the top of the canyons within the sampling area in addition to being the primary sounder in shallow water.The EM710 provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 70 to 100 kHz.Data are stored in *.all raw format for bathymetry and backscatter at CSIRO. There are 164 files totalling 24.9 GB of raw data in this dataset.Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format is corrected for motion and position.Tide corrections were not applied to the processed data. Processed data had outliers removed. Processed line data are available in *.gsf and ascii format.Additional information regarding this dataset, including further information on processing streams, 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"调查者"号科考船（RV Investigator）航次IN2017_T02采集的多波束测深仪（multibeam echosounder）数据，该航次主题为"澳大利亚研究生海洋培训合作联盟网络（Collaborative Australian Postgraduate Sea Training Alliance Network, CAPSTAN）：培养下一代海洋科学家"。本次航次于2017年11月14日至11月26日开展，从西澳大利亚州弗里曼特尔起航，最终抵达塔斯马尼亚州霍巴特。本次数据采集采用康斯伯格（Kongsberg）EM710型多波束测深仪，获取海底地形水深数据与反向散射信息，总航行里程达1711千米，所获数据主要用于测绘采样区域内的大陆架与峡谷顶部地形，同时作为浅水区的主用测深设备。该EM710型测深仪的发射与接收角分辨率分别为0.5°×1°，标称频率范围为70 kHz至100 kHz。所有水深与反向散射原始数据以*.all格式存储于澳大利亚联邦科学与工业研究组织（CSIRO），本数据集共包含164个原始数据文件，总容量达24.9 GB。数据采集阶段已对该数据应用声速剖面校正，*.all格式存储的水深数据已完成运动校正与位置校正，但未进行潮汐校正；处理后的数据已剔除异常值，处理后的测线数据可通过*.gsf与ASCII格式获取。有关本数据集的更多信息，包括处理流程的详细说明，均收录于GSM数据采集与处理报告中，额外数据产品可根据申请提供。