AUV Imagery and Environmental Data from Gippsland Basin (GA350 - 'Before' survey)

This dataset is part of the Gippsland Marine Environmental Monitoring (GMEM) project. The GMEM was developed in response to stakeholder concerns from the fisheries industry about a Geoscience Australia seismic survey in the Gippsland Basin (GA352 in April 2015), in addition to a broader need to acquire baseline data to be used to quantify impacts of seismic operations on marine organisms. A component of this study was to acquire images of the seafloor before and after the seismic survey for analysis of potential impacts of seismic operations on scallops.This dataset contains information collected from the AUV-Gavia on survey GA-350 conducted 27 March 3 April 2015. The Gavia is an AUV operated by the Australian Maritime College and includes a single camera and a range of environmental sensors. It was flown at an altitude of XX m at ~ 1.5 m/s with XX megapixel images acquired every XX seconds using a XX lighting system (the latter functional for Stations XX , XX, XX). In addition, Go-Pro cameras were mounted on the AUV's exterior to provide continuous video of the seafloor. The Gavia returned usable still images at 9 sites. This dataset contains the following data types: 1) Geotiffs acquired from the AUV nose cone camera with associated broadcale assessment of image quality on each transect, 2) Go-Pro videos acquired from external AUV mount, 3) optical backscatter, 4) ADCP data, 5) interferometric bathymetry, 6) associated shapefiles and location maps. For each data type, a Word file provides additional data about the folder structure, file types, and post-processing if applicable.

本数据集隶属于吉普斯兰海洋环境监测（Gippsland Marine Environmental Monitoring, GMEM）项目。该项目的设立，一方面旨在回应渔业行业相关方对澳大利亚地球科学局（Geoscience Australia）2015年4月在吉普斯兰盆地开展的GA352地震勘探作业的关切，另一方面也为满足获取基线数据以量化地震勘探作业对海洋生物影响的广泛研究需求。本研究的一项核心内容为，采集该地震勘探作业前后的海床影像，以分析勘探作业对扇贝的潜在影响。

本数据集的数据采集工作依托澳大利亚海事学院（Australian Maritime College）运营的“Gavia”号自主水下航行器（Autonomous Underwater Vehicle, AUV）完成，对应2015年3月27日至4月3日开展的GA-350航次。该自主水下航行器搭载单台相机与多类环境传感器，作业时航行高度为XX米，航行速度约1.5米/秒，每XX秒采集一张XX百万像素的海床影像，配套XX照明系统（该系统仅在XX、XX、XX站位启用）。此外，航行器外部还加装了Go-Pro相机，以持续录制海床视频。本次作业共在9个站位获取了可用的静态影像。

本数据集涵盖以下6类数据：
1. 取自航行器前锥相机的GeoTIFF影像，附带每条测线的影像质量整体评估结果；
2. 取自航行器外部挂载设备的Go-Pro视频素材；
3. 光学后向散射数据；
4. 声学多普勒流速剖面仪（Acoustic Doppler Current Profiler, ADCP）数据；
5. 干涉式水深数据；
6. 配套的形状文件（shapefiles）与位置分布图。

针对每一类数据，均配有Word文档，详细说明文件夹结构、文件类型及必要的后处理流程。