Backscatter grids of South East Tasmania Shelf

Geoscience Australia carried out marine surveys in southeast Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island.The datasets contains 7 backscatter grids of the south east Tasmania Shelf produced from the processed EM3002 backscatter data of the survey area using the CMST-GA MB Process.

澳大利亚地球科学局于2008年和2009年在塔斯马尼亚东南部开展了海洋调查（GA0315），旨在通过水下拖曳视频观测栖息地，绘制海底水深（bathymetry）图并表征底栖环境（benthic environments）。数据由塔斯马尼亚水产养殖与渔业研究所（TAFI）的挑战者号研究船采集。水深测量制图在七个调查区域开展，包括：弗雷西内半岛（83平方公里，东海岸及陆架）、塔斯曼半岛（117平方公里，东海岸及陆架）、亚瑟港及邻近开阔海岸（17平方公里）、修士群岛（The Friars，41平方公里，布鲁尼岛以南）、霍恩河下游河口（39平方公里）、德恩特卡斯特奥海峡（D Entrecastreaux Channel，7平方公里，布鲁尼岛以北的廷德博克斯附近）以及玛丽亚岛（3平方公里，西侧）。海底视频表征主要集中在所有制图区域的基岩礁及邻近海底区域，但德恩特卡斯特奥海峡和玛丽亚岛除外。

该数据集包含7个塔斯马尼亚东南部陆架的反向散射网格（backscatter grids），这些网格是通过CMST-GA MB流程对调查区域的EM3002反向散射数据进行处理后生成的。