IN2022_V05 Tasman Sea Margin Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group 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 arrived at Brisbane on 3rd Jul 2022.\n\nThis voyage utilised the seismic reflection profiling, bathymetric mapping, coring, and dredging capabilities of the RV Investigator to gather the data required to test competing models of the SEACM’s geologic evolution and how its submarine landslides generate dangerous and potentially lethal tsunami.\n\nThis dataset is published with the permission of CSIRO. Not to be used for navigational purposes.\n\nThe dataset contains bathymetry grids of 10m to 210m resolution of the Tasman Sea Margin, produced from the processed EM122 and EM710 bathymetry data.\nLineage: Multibeam data logged in the EMs Kongsberg proprietary *.all format was imported and converted to be processed and cleaned using Qimera version 2.4.8. Data were imported into the Qimera project using vessel configuration read directly from the .all files for either the EM122 or EM710 accordingly. Project geodetics for Qimera were configured to use WGS84/UTM Zone 56S coordinates and EGM2008 heights.\n\nThe vertical referencing method used was RTK (Accurate Height) using the EGM2008 model from the QPS Geodetic Resources version 3.0.4.\n\nThe data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.

本图层组收录的是“探索者号”（RV Investigator）航次IN2022_V05采集的多波束回声测深数据，该航次主题为《澳大利亚塔斯曼海边缘的海啸成因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日抵达布里斯班。

本航次依托“探索者号”科考船的地震反射剖面探测、水深测绘、岩心取样与拖网采样能力，采集相关数据以验证东南澳大利亚大陆边缘（Southeastern Australian Continental Margin, SEACM）地质演化的多种竞争性假说模型，以及其海底滑坡如何引发具有致命危险性的海啸。

本数据集经澳大利亚联邦科学与工业研究组织（CSIRO）许可发布，严禁用于导航用途。

本数据集包含塔斯曼海边缘的水深栅格数据，分辨率区间为10米至210米，由经过预处理的EM122与EM710多波束测深数据生成。

数据溯源：以康斯伯格（Kongsberg）EM系列专有格式*.all存储的多波束数据被导入，使用Qimera 2.4.8版本进行处理与清洗。导入Qimera项目时，将直接从对应EM122或EM710的.all文件中读取船舶配置参数。Qimera项目的大地坐标系配置为WGS84/UTM 56S带坐标，高程基准采用EGM2008模型。

垂直基准采用基于QPS Geodetic Resources 3.0.4版本提供的EGM2008模型的RTK（精确高程）方法。

随后基于AusSeabed《多波束测深指南v2》中的“水深滤波器-分辨率”准则，通过Python与Caris批处理脚本将数据网格化为多种分辨率，并对异常值进行筛查。本数据集的L3文件夹中提供最终栅格产品。此外，已按测线将最终处理后的数据导出为GSF与ASCII格式，存放在本数据集的L2文件夹中。