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.

本数据集记录了探索者号（RV Investigator）IN2023_V06航次采集的多波束测深声呐（multibeam echosounder）数据，航次主题为《东澳大利亚洋流系统中的涡旋相互作用及其影响》。本航次于2023年10月9日至11月2日开展，从新南威尔士州悉尼港出发，最终返回悉尼港。本航次使用康斯伯格（Kongsberg）EM122型多波束测深声呐，在新南威尔士州沿岸调查区域采集了海底地形（水深）、反向散射信息以及水体反向散射数据。该EM122型声呐的角分辨率为1°×1°，标称工作频率为12 kHz。数据存储于澳大利亚联邦科学与工业研究组织（CSIRO），其中水深与反向散射原始数据采用*.all格式存储，水体反向散射原始数据采用*.wcd格式存储。本数据集共包含760个文件，原始数据总容量达39.6 GB。数据采集阶段已对数据集应用声速剖面校正。*.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潮汐改正量，并应用于预处理后的数据，且预处理数据已剔除异常值。预处理后的测线数据可获取为*.gsf格式与ASCII格式，预处理后的水深网格数据采用GeoTIFF格式存储。关于本数据集的更多信息（包括处理流程的详细说明）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。