RV Investigator Voyage IN2022_V09 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2022_V09, titled "Valuing Australia’s new Gascoyne Marine Park." The voyage took place between 0000 November 19, 2022 and 0700 December 19, 2022 (UTC), departing from Fremantle and returning to Fremantle.The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter throughout the voyage in areas with water depths shallower than ~800m including areas within the Gascoyne and Ningaloo Marine Park.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 351 *.all files totaling 58.8 GB of raw bathymetry/backscatter data and 10 *.wcd files totaling 6.97 GB of watercolumn 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（调查者号研究船）航次IN2022_V09采集的多波束测深仪（multibeam echosounder）数据，该航次的项目主题为“评估澳大利亚新盖斯科因海洋公园价值”。本次航次于2022年11月19日0000时至2022年12月19日0700时（协调世界时UTC）执行，从弗里曼特尔起航并返回弗里曼特尔。

本航次使用Kongsberg EM710 MKII多波束测深仪，在水深约800米以浅的区域（涵盖盖斯科因与宁格罗海洋公园范围内海域）采集了海底测深、反向散射信息以及水体反向散射数据。该设备的发射与接收角分辨率分别为0.5°与1°，标称频率范围为40~100 kHz。

数据存储方面，海底测深与反向散射原始数据以*.all格式存储，水体反向散射原始数据以*.wcd格式存储，均存放于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集包含351个*.all格式文件，总容量达58.8 GB的原始海底测深/反向散射数据；另有10个*.wcd格式文件，总容量达6.97 GB的水体反向散射数据。

数据采集阶段已针对该数据集应用声速剖面修正。*.all格式存储的海底测深数据已完成运动校正与位置校正。采用EGM2008模型解算GPS潮汐数据，并将其应用于处理后的数据。已对处理完成的数据剔除异常值。处理后的测线数据可通过*.gsf与ASCII格式获取，处理后的海底测深网格数据采用GeoTIFF（geotiff）格式存储。

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。额外数据产品可根据申请提供。