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IN2022_V05航次所采集的多波束测深仪（multibeam echosounder）数据，该航次主题为"澳大利亚塔斯曼海边缘的海啸触发海底滑坡与深海峡谷：成因与后果"，于2022年3月28日从霍巴特起航，2022年7月3日返回布里斯班。

本次科考采用康斯伯格（Kongsberg）EM122多波束测深仪，沿澳大利亚东海岸采集了海底地形测深数据、反向散射信息以及水柱反向散射数据。

该EM122测深仪的角分辨率为1°×1°，标称工作频率为12 kHz。

本数据集的海底地形测深与反向散射原始数据以*.all格式存储，水柱反向散射数据以*.wcd格式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1428个文件，总原始数据量达18 GB。

数据采集过程中已对数据应用声速剖面校正。*.all格式存储的地形测深数据已完成运动校正与位置校正。

处理后的数据已采用EGM2008高程归算，并移除了异常值。处理后的测线数据以*.gsf和ASCII格式提供。

有关本数据集的更多信息（包括数据处理流程）可查阅《GSM数据采集与处理报告》，额外的数据产品可按需申请获取。