RV Investigator Voyage IN2019_T02 EM710 Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2019_T02, titled: "Deep seascapes of the Great Barrier Reef: Uncovering submarine canyons and landslides." The voyage took place between October 4 and October 14, 2019 departing from Brisbane (QLD) and arriving in Darwin (NT).

The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter between Brisbane to Darwin.

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 *.wcd format for watercolumn backscatter at CSIRO. There are 239 files totalling 59.3 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 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）科考船IN2019_T02航次采集的多波束测深声呐（multibeam echosounder）数据，航次主题为《大堡礁深海景观：揭秘海底峡谷与滑坡》。该航次于2019年10月4日至10月14日开展，从布里斯班（昆士兰州，QLD）起航，最终抵达达尔文（北领地，NT）。
本航次采用Kongsberg EM710型多波束测深声呐，采集了布里斯班至达尔文航线范围内的海底测深数据、反向散射信息以及水体柱反向散射数据。
EM710型声呐的发射与接收角分辨率分别为0.5°×1°，其标称工作频率范围为70 kHz至100 kHz。
本数据集的原始数据存储于澳大利亚联邦科学与工业研究组织（CSIRO），其中海底测深与反向散射数据采用*.all原始格式存储，水体柱反向散射数据采用*.wcd格式存储。本数据集共计239个文件，总原始数据量达59.3 GB。
数据采集阶段已应用声速剖面（sound velocity profiles）校正。*.all格式存储的海底测深数据已完成运动与位置校正。
处理后的数据集未施加潮汐校正，但已剔除异常值。处理后的航线数据以*.gsf格式与ASCII格式提供，处理后的海底测深与反向散射栅格数据采用GeoTIFF格式存储。
本数据集的更多相关信息（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。额外的数据产品可根据申请提供。