RV Investigator Voyage IN2023_V05 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2023_V05, titled "Untangling the causes of change over 25 years in the southeast marine ecosystem (Voyage 1). The voyage took place between June 28, 2023 and July 30, 2023 (AEST), departing from Hobart and returning to Hobart.

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information [and watercolumn backscatter] between/around [XXXXArea of survey].

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 1,470 files totalling 198 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.

本记录详述了RV Investigator号科考船航次IN2023_V05所采集的多波束测深声呐（multibeam echosounder）数据，该航次主题为《解析东南海洋生态系统25年变化的成因（航次1）》。本次航次执行时间为2023年6月28日至2023年7月30日（澳大利亚东部标准时间，AEST），启航及返航均始于霍巴特港。本航次采用Kongsberg EM710 MKII型多波束测深声呐，在[XXXX勘测区域]及周边海域采集了海底水深地形与反向散射信息[及水体反向散射信息]。该声呐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至100 kHz。本数据集的水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）。本数据集共包含1470个文件，总原始数据量达198 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中，处理后的数据集已剔除异常值。处理后的测线数据以*.gsf格式与ASCII格式提供，处理后的水深网格数据采用GeoTIFF格式存储。本数据集的更多相关信息（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。