RV Investigator Voyage IN2019_T03 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2019_T03, "ORCA: Using the Investigator radar as a moving reference for the Australian operational radar network" which departed Darwin on the 23 December 2019 and returned to Henderson on the 2 January 2020. The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter between Darwin and Henderson.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 258 *.raw files totalling 70.4 GB and 257 *.wcd files totalling 464 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.Tide corrections were not applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter 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“调查者号”（RV Investigator）研究船IN2019_T03航次采集的多波束测深声呐（multibeam echosounder）数据。该航次主题为“ORCA：以‘调查者号’雷达作为澳大利亚运行雷达网络的移动参考基准”，于2019年12月23日从达尔文港启航，2020年1月2日返回亨德森港。本航次采用康斯伯格（Kongsberg）EM710 MKII型多波束测深声呐，采集了达尔文至亨德森航线上的海底地形测深、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至100千赫兹（kHz）。本数据集的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，均由澳大利亚联邦科学与工业研究组织（CSIRO）保管。数据集共包含258个*.raw格式文件（总容量70.4吉字节（GB））与257个*.wcd格式文件（总容量464吉字节（GB））的原始数据。数据采集阶段已对该数据集应用声速剖面校正。*.all格式存储的测深数据已完成运动与位置校正，但处理后的数据未进行潮汐校正。处理后的数据集已剔除异常值，其中处理后的航线数据可获取为*.gsf与ASCII格式，处理后的海底地形测深与反向散射网格数据则为GeoTIFF（地理标记图像文件格式）格式。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。其他数据产品可根据申请提供。