RV Investigator Voyage IN2025_E01 EM124 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2025_E01, Trials and calibrations, which departed Hobart on the 19th February 2025 and returned to Hobart on the 1st March, 2025.The Kongsberg EM124 multibeam echosounder was used to acquire seafloor bathymetry, seafloor backscatter and water column backscatter.The EM124 provides a 1 degree by 1 degree angular resolution. The echosounder's nominal frequency is 12 kHz. Data are stored in *.kmall raw format for bathymetry and backscatter and *.kmwcd format for water column backscatter at CSIRO. There are 115 files totalling 7.41 GB of raw data and 115 files totalling 18.3 GB of water column data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.kmall 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. Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report.

本记录描述了“调查者号”（RV Investigator）科考船IN2025_E01航次（试验与校准航次）采集的多波束测深仪（multibeam echosounder）数据。该航次于2025年2月19日从霍巴特起航，2025年3月1日返回霍巴特。本航次采用康斯伯格（Kongsberg）EM124多波束测深仪采集海底地形测深（seafloor bathymetry）、海底反向散射（seafloor backscatter）以及水体反向散射（water column backscatter）数据。EM124的角分辨率为1°×1°，标称频率为12 kHz。本数据集的海底地形测深与反向散射数据以*.kmall原始格式存储，水体反向散射数据以*.kmwcd格式存储，存储于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）。数据集包含115个总容量7.41 GB的原始数据文件，以及115个总容量18.3 GB的水体反向散射数据文件。数据采集阶段已对原始数据应用声速剖面（sound velocity profile）校正。*.kmall格式存储的海底地形测深数据已完成运动与位置校正。已采用EGM2008地球重力场模型计算GPS潮汐并应用于处理后的数据，且处理后的数据已剔除异常值。有关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》。