RV Investigator Voyage IN2022_V05 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2022_V05 "The Tsunamigenic Submarine Landslides and Deep-Marine Canyons of Australia’s Tasman Sea Margin: Causes and Consequences" which departed Hobart on 28th Mar 2022 and returned to Brisbane on 3rd July 2022.The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter along the East coast of Australia.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 1,428 files totalling 18 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.EGM2008 height reduction was 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 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”（RV Investigator）科考船航次IN2022_V05期间采集的多波束测深数据，该航次主题为“澳大利亚塔斯曼海边缘的海啸致灾海底滑坡与深海峡谷：成因与后果”，于2022年3月28日从霍巴特启航，2022年7月3日返回布里斯班。本航次使用康士伯（Kongsberg）EM122多波束测深仪，沿澳大利亚东海岸采集了海底测深数据、反向散射信息以及水柱反向散射数据。EM122的角分辨率为1°×1°，标称工作频率为12 kHz。该数据集的原始数据分为两类：水深与反向散射原始数据采用*.all格式存储，水柱反向散射原始数据采用*.wcd格式存储，所有原始数据均存放于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共包含1428个文件，总数据量达18 GB。数据采集阶段已应用声速剖面校正，*.all格式存储的水深数据已完成运动与位置校正。已对处理后的数据应用EGM2008（地球重力场模型2008）高程归算，处理过程中已剔除异常值。处理后的测线数据可通过*.gsf格式与ASCII格式获取。有关本数据集的更多信息（包括处理流程），可查阅GSM数据采集与处理报告。此外，可根据需求申请获取额外的数据产品。