GA339_SOL5650 Oceanic Shoals survey marine underwater video and still images

The Oceanic Shoals survey (SOL5650, GA survey 339) was conducted on the R.V. Solander in collaboration with Geoscience Australia, the Australian Institute of Marine Science (AIMS), University of Western Australia and the Museum and Art Gallery of the Northern Territory between 12 September - 5 October, 2012. During the survey, underwater video and still images were acquired using the AIMS towed camera system. Video was acquired using a forward-facing camera (files available in sub-folder 'NERP_TOWVID_VIDEOS'), and still images were acquired with a downward-facing camera, with images taken every 10 seconds (files available in sub-folder 'NERP_TOWVID_STILLS'). Video was converted from tapes to compressed .avi files. Video was characterised onboard in real-time using the AIMS' Towvid characterisation scheme. These characterisations are available in sub-folder 'NERP_TOWVID_CSVs'. Location of ship movement during camera and sled transects are included in the spreadsheet 'SOL5650_GA0339_Stations.xls'. Exact location of the camera during deployment is recorded via the USBL and can be found in sub-folder 'NERP_USBL'.Video and associated still images were not acquired from STN13CAM09. Video is not available from 27CAM18 and 28CAM19 (these stations were not on the digital files supplied by AIMS), although still images and Towvid characterisations were supplied. Video Tape 12 is the same as Tape 11, as supplied by AIMS. All video files were renamed at GA with a prefix listing stations contained on a given tape/file. In addition to underwater imagery, laboratory and deck photos were taken of specimens collected from the benthic sled. These are included in the sub-folder 'NERP_SPECIMEN_PHOTOS'Video and image files or associated parent folders are named by station number, gear code (CAM = underwater camera system, BS = benthic sled) and then the deployment number. For example '48CAM35' represents a video transect from Station 48 that was the 35th video transect on the survey.Data is presented here exactly as acquired onboard and converted by the AIMS, and positional accuracy or image quality has not been verified.

本次海洋浅滩科考（SOL5650，GA科考339）由“索兰德号”科考调查船（R.V. Solander）执行，合作方包括澳大利亚地球科学局（Geoscience Australia）、澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）、西澳大利亚大学以及北领地博物馆与美术馆，科考时段为2012年9月12日至10月5日。

科考期间，研究团队采用澳大利亚海洋科学研究所的拖曳摄像系统（towed camera system）采集水下视频与静态图像。其中，视频由前置摄像头采集，相关文件存储于子文件夹“NERP_TOWVID_VIDEOS”；静态图像由俯拍摄像头以每10秒一张的速率拍摄，文件存储于子文件夹“NERP_TOWVID_STILLS”。

所有视频已从原始录像带转换为压缩.avi格式文件。科考船现场采用澳大利亚海洋科学研究所的Towvid表征方案对视频进行实时标注，标注结果存储于子文件夹“NERP_TOWVID_CSVs”。

摄像头与底栖雪橇（benthic sled）断面作业时的船舶移动位置记录于电子表格“SOL5650_GA0339_Stations.xls”中。部署阶段摄像头的精确位置通过超短基线（USBL）系统记录，相关数据存储于子文件夹“NERP_USBL”。

STN13CAM09站点未采集视频及配套静态图像。27CAM18与28CAM19站点无可用视频（上述站点未收录于AIMS提供的数字文件中），但该站点的静态图像与Towvid标注结果已完整提供。由AIMS提供的12号录像带与11号录像带内容完全一致。所有视频文件已由澳大利亚地球科学局（GA）重命名，文件名前缀包含该磁带/文件所涵盖的站点编号。

除水下影像外，研究团队还拍摄了底栖雪橇采集的标本的实验室及甲板照片，相关文件存储于子文件夹“NERP_SPECIMEN_PHOTOS”。

视频与图像文件及其上级文件夹均以站点编号、设备代码（CAM=水下摄像系统，BS=底栖雪橇）及部署序号命名。例如“48CAM35”代表站点48的第35次视频断面采集数据。

本次数据集完全按照科考船现场采集及AIMS转换后的原始格式发布，未对位置精度与图像质量进行验证。