RV Investigator Voyage IN2023_V06 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney.

The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter around NSW coast survey area.

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 760 files totalling 39.6 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. GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry 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IN2023_V06航次采集的多波束测深声呐（multibeam echosounder）数据，该航次主题为《理解东澳大利亚洋流系统中的涡旋相互作用及其影响》。航次执行时间为2023年10月9日至11月2日，从悉尼（新南威尔士州，NSW）启航并最终返回悉尼。

本次数据采集使用康斯伯格（Kongsberg）EM122多波束测深声呐，在新南威尔士州沿岸调查区域获取了海底地形（水深测量）数据、反向散射信息以及水体柱反向散射数据。

EM122的角分辨率为1°×1°，该声呐的标称工作频率为12 kHz。

该数据集的水深与反向散射原始数据采用*.all格式存储，水体柱反向散射数据采用*.wcd格式存储，相关数据存放于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation，CSIRO）。本数据集共计包含760个文件，总原始数据量达39.6 GB。

数据采集阶段已应用声速剖面校正。*.all格式存储的水深数据已完成运动与位置校正。采用EGM2008模型计算GPS潮汐校正量，并将其应用于处理后数据；处理后数据已完成异常值剔除。处理后的测线数据可获取为*.gsf格式与ASCII格式，处理后的水深网格数据则为GeoTIFF格式（GeoTIFF）。

有关本数据集的更多信息，包括进一步的处理流程说明，均收录于GSM数据采集与处理报告中。其他额外数据产品可根据申请提供。