IN2015_V02 East Australian Current Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2015_V02 titled "Sustained monitoring of the East Australian Current: Mass, heat and freshwater transports". The voyage took place between May 15 and May 26, 2015, departing from Sydney (NSW) and arriving in Brisbane (QLD).\n\nThe purpose of this voyage was to undertake swath mapping off of Fraser Island out to the abyssal plain. This was used to assist in defining the location of 6 mooring sites.\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 East Australian Current, produced from the processed EM122 and EM710 bathymetry data.\nLineage: Data processing for the EM122 and EM710 data was performed using CARIS 8.1.8. Data from both systems were imported into a single CARIS project using different vessel files, Investigator_EM122 and Investigator_EM710. A zero tide file was applied to the data before merging. All lines were swath edited and then gridded at 25m using Swath Angle determination. Areas were then further edited using subset editor.\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.\n

本图层组描述的是基于RV Investigator号研究船（RV Investigator）IN2015_V02航次采集的多波束测深仪（multibeam echosounder）数据，该航次主题为"东澳大利亚海流（East Australian Current）持续监测：质量、热量与淡水输运"。本次航行于2015年5月15日至5月26日期间开展，从新南威尔士州悉尼出发，最终抵达昆士兰州布里斯班。

本次航行的任务目标是在弗雷泽岛外侧至深海平原（abyssal plain）区域开展条带测深（swath mapping）作业，该作业成果用于辅助确定6个锚泊站点（mooring sites）的布设位置。

本数据集经澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）许可发布，不得用于导航用途。

本数据集包含基于处理后的EM122与EM710多波束测深数据生成的东澳大利亚海流区域水深栅格数据（bathymetry grids），分辨率介于10米至210米之间。

数据溯源：EM122与EM710数据的处理工作采用CARIS 8.1.8软件完成。两套系统的原始数据分别通过Investigator_EM122与Investigator_EM710两个船载配置文件导入至同一个CARIS项目中。合并前已对数据应用零潮位文件进行校正。所有测线均完成条带编辑，随后通过条带角度确定法以25米分辨率进行栅格化处理，后续再通过子集编辑器对部分区域进行了额外编辑。

随后基于澳大利亚海床多波束指南v2（AusSeabed Multibeam guidelines v2）制定的水深滤波器与分辨率匹配准则，通过CARIS Python批处理脚本将数据生成多种分辨率的栅格产品，并进一步对异常值进行筛查。最终栅格产品可在本数据集集合的L3文件夹中获取。最终处理后的单条测线数据还分别导出为通用传感器格式（Generic Sensor Format, GSF）与美国信息交换标准代码（American Standard Code for Information Interchange, ASCII）格式，可在本数据集集合的L2文件夹中获取。