RV Investigator Voyage IN2017_C01 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_C01, 'GAB deep water geological and benthic ecology program' which departed Hobart on the 11 April 2017 and returned to Hobart on the 28 April 2017.

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter around the GAB.

The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz.

Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 118 files totalling 47.4 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 applied to the processed data. Processed data has 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 further 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”号科考船IN2017_C01航次（“GAB深水地质与底栖生态学计划”）所采集的多波束测深数据，该航次于2017年4月11日从霍巴特启航，2017年4月28日返回霍巴特港。

本航次采用Kongsberg EM710 MKII多波束测深仪，采集了大澳大利亚湾（Great Australian Bight, GAB）周边的海底地形测深数据、反向散射信息以及水柱反向散射数据。

该EM710 MKII多波束测深仪的发射与接收角分辨率分别为0.5°×1°，标称工作频率范围为40 kHz至100 kHz。

本数据集的测深与反向散射原始数据以*.all格式存储，水柱反向散射原始数据以*.wcd格式存储于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）。本数据集共包含118个文件，总原始数据量达47.4 GB。

数据采集阶段已对该数据集应用声速剖面校正。*.all格式存储的测深数据已完成运动校正与位置校正。

已对处理后的数据施加潮汐校正，并剔除了异常值。处理后的测线数据以*.gsf与ASCII格式提供，处理后的测深与反向散射栅格数据以GeoTIFF格式提供。

有关本数据集的更多信息（包括处理流程的详细说明）均收录于GSM数据采集与处理报告中。其他数据产品可根据申请提供。