RV Investigator Voyage IN2018_V04 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_V04, 'Constraining external iron inputs and cycling in the southern extension of the East Australian Current' which departed Hobart on the 11 September 2018 and returned to Hobart on the 8 October 2018.The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter data.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 23 files totalling 11.1 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/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.

本记录描述了RV Investigator号科考船IN2018_V04航次采集的多波束测深声呐（multibeam echosounder）数据，该航次主题为“约束东澳流南部延伸区的外部铁输入与循环”，于2018年9月11日从霍巴特启航，2018年10月8日返回霍巴特。本次航次使用康斯伯格（Kongsberg）EM710 MKII型多波束测深声呐，采集了海底地形测深、反向散射信息以及水体反向散射数据。该EM710 MKII型声呐的发射与接收角分辨率分别为0.5°×1°，标称工作频率范围为40至100 kHz。澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）将测深与反向散射数据存储为*.all原始格式，水体反向散射数据存储为*.wcd格式。本数据集共包含23个原始数据文件，总容量达11.1 GB。数据采集阶段已针对该数据应用声速剖面校正。存储为*.all格式的测深数据已完成运动与位置校正。已处理数据已施加潮汐校正[已施加/未施加]。已处理数据已完成异常值剔除。已处理的测线数据可获取为*.gsf格式与美国信息交换标准代码（ASCII）格式，已处理的测深与反向散射网格数据可获取为地理标记图像文件格式（GeoTIFF）。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》中。其他数据产品可根据申请获取。