RV Investigator Voyage IN2019_V07 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2019_V07, 'RAN Hydrographic and Maritime Heritage Surveys' which departed Hobart on the 11 April 2019 and returned to Hobart on the 23 April 2019.The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information [and watercolumn backscatter] along the Tasmanian East Coast/Tasman Sea.The EM122 provides a 1 degree by 1 degree angular resolution. The echosounder's nominal frequency is 12 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 3.37 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.Tide corrections were not 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.

本数据集记载了探索者号（RV Investigator）科考船执行IN2019_V07航次“RAN水文与海洋遗产调查”期间采集的多波束测深声呐（multibeam echosounder）数据。该航次于2019年4月11日从霍巴特港启航，同年4月23日返回霍巴特。本航次搭载的Kongsberg EM122多波束测深声呐，沿塔斯马尼亚东海岸/塔斯曼海海域采集了海底地形测深（bathymetry）数据、反向散射（backscatter）信息[及水柱反向散射（watercolumn backscatter）]。该声呐的角分辨率为1°×1°，标称工作频率为12 kHz。数据在澳大利亚联邦科学与工业研究组织（CSIRO）的存储格式为：海底地形测深与反向散射数据采用*.all原始格式存储，水柱反向散射数据采用*.wcd格式存储。本数据集共计包含102个原始数据文件，总容量达3.37 GB。数据采集阶段已应用声速剖面校正。*.all格式存储的海底地形测深数据已完成运动校正与位置校正，但未施加潮汐校正；处理后的数据已完成异常值剔除。经处理的测线数据可通过*.gsf与ASCII格式获取，处理后的海底地形测深与反向散射栅格数据采用GeoTIFF格式存储。本数据集的更多相关信息（含处理流程）收录于GSM数据采集与处理报告。另有额外数据产品可根据申请提供。