RV Investigator Voyage IN2017_V02 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_V02, 'SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania' which departed Hobart on the 17 March 2017 and returned to Hobart on the 28 March 2017.The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information in the southern oceanThe 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 163 files totalling 3.8 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 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.

本记录描述了RV Investigator号科考船IN2017_V02航次采集的多波束测深声呐数据，该航次名称为“SOTS：塔斯马尼亚岛西南海域气候与碳循环研究用南大洋时间序列自动锚系系统”，航次于2017年3月17日从霍巴特起航，2017年3月28日返回霍巴特。本次航次采用康斯伯格（Kongsberg）EM122多波束测深声呐，于南大洋海域采集海底水深地形与后向散射数据。该声呐的角分辨率为1°×1°，标称工作频率为12 kHz。本数据集的海底水深地形与后向散射原始数据以*.all格式存储，水柱后向散射数据以*.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）。数据集共计包含163个原始数据文件，总容量达3.8 GB。数据采集阶段已针对本数据集应用声速剖面校正。*.all格式存储的水深地形数据已完成运动与位置校正。经处理的数据已施加潮汐校正，并剔除了异常值。处理后的航线数据以*.gsf与ASCII格式提供，处理后的水深地形与后向散射网格数据以GeoTIFF格式提供。有关本数据集的更多信息（含处理流程相关内容）均收录于GSM数据采集与处理报告中。额外的数据产品可按需申请获取。