RV Investigator Voyage IN2021_E02 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2021_E02, to calibrate and commission new, upgraded and existing critical equipment (with sea trials and personnel training) onboard RV Investigator for upcoming voyages in the 2021 schedule and beyond. The primary objectives for this voyage were testing the Deep Corer winch stream and respool, Trawling winch calibration, CTD winch 1 & 2 calibrations, HOTS commissioning and Heave Compensation testing, and Deep Towed Camera trial and calibration. The voyage took place between November 20 and November 28, 2021, departing from Hobart (TAS) and returning to Hobart.The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter around east of Tasmania and around Freycinet Marine Park.The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz.Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 32 files totalling 12.2 GB of raw data in this dataset and 30 files totalling 39.7 GB of watercolumn data.Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.Tide corrections were applied to the processed data using RTK/GPS height and the EGM2008 geoid model in Caris. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff 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“探索者号（RV Investigator）”IN2021_E02航次采集的多波束测深声呐数据，用于对“探索者号”上的新型、升级型及关键在用设备开展校准与试航（含海上试验与人员培训），以保障2021年度及后续航次的顺利执行。本航次的核心任务包括：测试深岩芯取样绞车缆绳系统与缆绳重绕作业、拖网绞车校准、温盐深仪（CTD）1号与2号绞车校准、HOTS系统调试与升沉补偿测试，以及深海拖曳摄像头的试验与校准。本航次于2021年11月20日至11月28日开展，从塔斯马尼亚州（TAS）霍巴特港起航并最终返回霍巴特。本航次使用康斯伯格（Kongsberg）EM710 MKII型多波束测深声呐，在塔斯马尼亚岛东部海域以及弗雷西内特海洋公园（Freycinet Marine Park）周边采集海底地形测深、反向散射数据以及水体柱反向散射数据。该EM710 MKII型声呐的发射与接收角分辨率分别为0.5°与1°，标称工作频率范围为40至100千赫兹（kHz）。本次采集的测深与反向散射原始数据以*.all格式存储，水体柱反向散射数据以*.wcd格式存储，均存放于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集包含32个原始数据文件，总容量达12.2吉字节（GB）；另有30个水体柱数据文件，总容量达39.7吉字节（GB）。数据采集阶段已针对该数据集应用声速剖面校正。*.all格式存储的测深数据已完成运动与位置校正。经处理的数据已在卡里斯（Caris）软件中，通过实时动态差分（RTK）/GPS高程数据与EGM2008地球重力场模型完成潮汐校正。已处理的数据已完成异常值剔除。处理后的测线数据可通过*.gsf与ASCII格式获取，处理后的海底地形与反向散射栅格数据则采用GeoTIFF格式存储。本数据集的更多相关信息（包括处理流程的详细说明）收录于《GSM数据采集与处理报告》中。其他数据产品可根据申请提供。