RV Investigator Voyage IN2018_E02 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_E02, titled 'MNF Trials and Calibrations' which departed Hobart on the 3rd of September 2018 and returned to Hobart on the 9th of September 2018.

The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information [and watercolumn backscatter] around south eastern 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 68 files totalling 1.7 GB of raw data in this dataset.

Multibeam bathymetry calibrations were performed on this trial.

Tide corrections were not applied to the processed data. Processed data had outliers removed. Processed line data is not available as this was for calibration testing.

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.

本数据集记录了搭载于“调查者号”（RV Investigator）科考船IN2018_E02航次的多波束测深仪（multibeam echosounder）数据，该航次主题为“MNF试验与校准”，于2018年9月3日从霍巴特起航，同年9月9日返回霍巴特。

本次航次采用康斯伯格（Kongsberg）EM122型多波束测深仪，采集了塔斯马尼亚东南部海域的海底地形、反向散射信息[及水柱反向散射信息]。

该EM122型测深仪的角分辨率为1°×1°，标称工作频率为12 kHz。

本数据集的海底地形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（CSIRO）。本数据集共包含68个数据文件，原始数据总容量达1.7 GB。

本次试验完成了多波束海底测深校准工作。

处理后的数据未施加潮汐校正，但已剔除异常值。由于本数据集仅用于校准测试，因此未提供测线处理后的数据。

有关本数据集的更多信息（包括数据处理流程相关内容）均收录于《GSM数据采集与处理报告》中。如需获取额外数据产品，可提出申请。