RV Investigator Voyage IN2024_T02 EM122 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2024_T02, Brisbane to Singapore Transit which departed Brisbane on the 8th July 2024 and returned to Singapore on the 23rd July 2024.

The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter between Brisbane and Singapore.

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 34 files totalling 3.25 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“调查者号”（RV Investigator）航次IN2024_T02期间采集的多波束测深仪（multibeam echosounder）数据，该航次为布里斯班至新加坡航渡任务，于2024年7月8日从布里斯班起航，2024年7月23日返回新加坡。

采用康斯伯格EM122（Kongsberg EM122）多波束测深仪，采集了布里斯班至新加坡航线范围内的海底水深测量（seafloor bathymetry）数据、反向散射信息及水柱反向散射数据。

EM122的角分辨率为1°×1°，该测深仪的标称频率为12 kHz。

本数据集的海底水深测量与反向散射原始数据以*.all格式存储，水柱反向散射数据以*.wcd格式存储于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共包含34个原始数据文件，总容量为3.25 GB。

数据采集过程中已施加声速剖面（sound velocity profiles）校正。*.all格式存储的水深测量数据已完成运动与位置校正。采用EGM2008模型解算GPS潮位并施加于处理后数据。处理后数据已剔除异常值。处理后的测线数据以*.gsf格式与ASCII格式提供，处理后的海底水深网格数据以GeoTIFF格式提供。

关于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。额外的数据产品可根据申请提供。