RV Investigator Voyage IN2016_V03 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on the RV Investigator voyage IN2016_V03, 'Monitoring Ocean Change and Variability along 170° W from the ice edge to the equator', which departed Hobart on the 26 April 2016 and returned to Lautoka, Fiji on the 30 June 2016. There was a port call at Wellington, New Zealand, 26 - 27 May for some science personnel change; this resulted in two "legs" of the voyage therefore Leg 1 is 26 April - 26 May 2016, and Leg 2 27 May - 30 June 2016.The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information.The EM710 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 at CSIRO. There are 46 files totalling 5.51 GB of raw data in this dataset.Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format is corrected for motion and position.Tide corrections were not applied to the processed data. Processed data has had outliers removed. Processed line data is 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.

本记录记载了“RV Investigator”号科考船IN2016_V03航次采集的多波束测深声呐（multibeam echosounder）数据，该航次主题为“沿170°W从冰缘至赤道监测海洋变化与变异性”，于2016年4月26日从霍巴特起航，2016年6月30日返回斐济劳托卡。本航次曾于2016年5月26日至27日在新西兰惠灵顿靠港，以完成部分科考人员的轮换，因此分为两个航段：航段1为2016年4月26日至5月26日，航段2为2016年5月27日至6月30日。本航次使用Kongsberg EM710 MKII多波束测深声呐采集海底测深地形（seafloor bathymetry）与声学反向散射（backscatter）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 kHz至100 kHz。本数据集的海底测深地形与声学反向散射原始数据以*.all格式存储于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共计包含46个原始数据文件，总容量达5.51 GB。数据采集阶段已针对该数据集应用声速剖面校正。*.all格式存储的海底测深地形数据已完成运动校正与位置校正，但未施加潮汐校正。经处理的数据已剔除异常值。处理后的测线数据可获取为*.gsf格式与ASCII格式，海底测深地形网格化数据则以GeoTIFF格式提供。另有关于本数据集的更多信息（含处理流程的详细说明）收录于GSM数据采集与处理报告中。额外的数据产品可根据申请提供。