RV Investigator Voyage IN2023_V01 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2023_V01, titled "Antarctic Bottom Water Production in the past: Records from marine sediments, Cape Darnley, East Antarctica". The voyage took place between 25th January, 2023 and 2nd March, 2023 departing from Henderson's (WA) and arriving in Hobart (TAS).The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter between Fremantle to Antarctica and Albany to Hobart.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 102 files totalling 26.3 GB of raw data in this dataset.Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.Bathymetry data contained in *.all format are corrected for motion and position. GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data 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 information on processing streams, 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”科考船（RV Investigator）航次IN2023_V01采集的多波束测深仪（multibeam echosounder）数据，项目标题为“过去南极底层水形成：东南极丹尼利角海洋沉积物记录”。本次航次执行时间为2023年1月25日至2023年3月2日，从西澳大利亚州亨德森港出发，最终抵达塔斯马尼亚州霍巴特港。本次数据采集使用康斯伯格（Kongsberg）EM710 MKII型多波束测深仪，采集范围涵盖弗里曼特尔至南极海域以及奥尔巴尼至霍巴特航线的海底地形、反向散射信息与水体反向散射数据。该EM710 MKII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40 kHz至100 kHz。数据以*.all原始格式存储海底地形与反向散射数据，以*.wcd格式存储水体反向散射数据，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102个原始数据文件，总容量达26.3 GB。数据采集阶段已对该数据集应用声速剖面校正。*.all格式存储的海底地形数据已完成运动与位置校正。已采用EGM2008重力场模型解算GPS潮汐数据，并将其应用于处理后的数据。处理后的数据已剔除异常值。处理后的测线数据可获取为*.gsf格式与ASCII格式，处理后的海底地形与反向散射网格数据可获取为GeoTIFF格式。本数据集的补充信息（包括处理流程相关内容）收录于《GSM数据采集与处理报告》中。其他数据产品可根据需求提供。