RV Investigator Voyage IN2016_V01 EM710 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2016_V01, 'HEOBI: Heard Earth-Ocean-Biosphere Interactions' which departed Fremantle on the 8th January 2016 and returned to Hobart on the 27th February 2016.

The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter around Heard and Macdonald islands and between Fremantle and Hobart.

The EM710 provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 70 to 100 kHz.

Data are stored in *.all raw format for bathymetry and backscatter and in *.wcd format for watercolumn backscatter at the CSIRO. There are 923 files totalling 58.3 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 had outliers removed. Processed line data is 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“探索者号（RV Investigator）”考察船IN2016_V01航次采集的多波束测深声呐数据，该航次代号为HEOBI：赫德-地球-海洋-生物圈相互作用（Heard Earth-Ocean-Biosphere Interactions），于2016年1月8日从弗里曼特尔驶离，2016年2月27日返回霍巴特。
本次航次采用康士伯（Kongsberg）EM710多波束测深声呐，采集了赫德岛与麦克唐纳岛周边以及弗里曼特尔至霍巴特航线沿线及周边的海底测深与反向散射信息，同时采集了该区域的水柱反向散射数据。
EM710的发射与接收角分辨率分别为0.5°×1°，该声呐的标称工作频率范围为70~100 kHz。
本数据集的海底测深与反向散射原始数据以*.all格式存储，水柱反向散射原始数据以*.wcd格式存储于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共计923个文件，总原始数据量达58.3 GB。
数据采集阶段已对该数据应用声速剖面校正。*.all格式存储的海底测深数据已完成运动校正与位置校正。
处理后的数据未施加潮汐校正，但已完成异常值剔除。处理后的航线数据以*.gsf与ASCII格式提供，处理后的海底测深与反向散射格网数据以GeoTIFF格式提供。
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。额外的数据产品可应申请提供。