Backscatter grid of Lord Howe Island

Geoscience Australia carried out a marine survey on Lord Howe Island shelf (NSW) in 2008 (SS062008) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, rock coring, observation of benthic habitats using underwater towed video, and measurement of ocean tides and wavegenerated currents. Subbottom profile data was also collected to map sediment thickness and shelf stratigraphy. Data and samples were acquired using the National Facility Research Vessel Southern Surveyor. Bathymetric data from this survey was merged with other preexisting bathymetric data (including LADS) to generate a grid covering 1034 sq km. As part of a separate Geoscience Australia survey in 2007 (TAN0713), an oceanographic mooring was deployed on the northern edge of Lord Howe Island shelf. The mooring was recovered during the 2008 survey following a 6 month deployment.lh_back_8m is a backscatter grid of the Lord Howe survey area produced from the processed EM300 backscatter data of the survey area using the CMST-GA MB Process.

澳大利亚地球科学局（Geoscience Australia）于2008年针对豪勋爵岛陆架（新南威尔士州）开展了编号为SS062008的海洋调查，旨在绘制海底水深图，并通过同步采集表层沉积物与底内生物样品、开展岩石岩心取样、借助水下拖曳视频观测底栖生境，以及测量海洋潮汐与波浪生成海流，对底栖环境进行表征。本次调查同时采集了浅地层剖面数据，用于绘制沉积物厚度与陆架地层分布。数据及样品的采集工作依托国家设施研究船“南方探索者号”（Southern Surveyor）完成。本次调查获取的水深数据与其他已有水深数据（包括LADS）进行融合，生成了覆盖面积达1034平方公里的格网数据集。作为澳大利亚地球科学局2007年另一项编号为TAN0713的调查的组成部分，一套海洋学锚系装置被部署于豪勋爵岛陆架北缘，该装置在为期6个月的部署后，于2008年的本次调查中被回收。lh_back_8m为豪勋爵岛调查区域的后散射格网数据，系采用CMST-GA MB Process处理该调查区域的EM300后散射数据后生成。