RV Investigator Voyage IN2017_E02 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_E02, Gear Trials which departed Hobart on the 31-March-2017 and returned to Hobart on the 2-April-2017.

The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information between/around the Huon marine reserve, south east Tasmania.

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 42 files totalling 2.24 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.

Tide corrections [were/were not] applied to the processed data. Processed data had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff 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.

本记录描述了RV Investigator号研究调查船航次IN2017_E02「设备试验」所采集的多波束测深数据（multibeam echosounder data）。该航次于2017年3月31日从霍巴特启航，2017年4月2日返回霍巴特。
本航次使用康斯伯格EM122多波束测深仪（multibeam echosounder），采集了塔斯马尼亚东南部休恩海洋保护区（Huon marine reserve）及其周边海域的海底地形测深数据与反向散射信息。
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，均存放于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation，缩写CSIRO）。本数据集共包含42个原始数据文件，总容量达2.24 GB。
数据采集阶段已应用声速剖面校正。*.all格式存储的测深数据已完成运动与位置校正。
经处理的数据是否已施加潮汐校正尚未明确。经处理的数据已完成异常值剔除。经处理的测线数据以*.gsf格式与ASCII格式提供，经处理的测深与反向散射网格数据以GeoTIFF格式提供。
有关本数据集的更多信息（包括处理流程相关内容）均收录于GSM数据采集与处理报告中。额外数据产品可根据申请提供。