SWERUS-C3 Expedition EK80 sonar data, Eastern Siberian Arctic margin, September 18 - 19, 2014

The contributed data represents watercolumn backscatter data collected with a Simrad EK80 Wide-band Transceiver (WBT) transmitting through a Simrad ES18-11 scientific split-beam echosounder on the Icebreaker Oden during Leg 2 of the SWERUS-C3 2014 expedition (Swedish-Russian-US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions). The EK80 WBT was installed by UNH on the Oden especially for this program. The data were collected over a band of approximately 16 - 29 kHz providing extremely high resolution imagery of the water column that has allowed us to distinguish individual bubbles at methane gas seeps and fine-scale structure, including thermohaline steps, in the water column. Files are named according to the format: ODEN-{Date}-{Time}.raw. "ODEN" indicates that the measurements were taken on the Icebreaker Oden. {Date} corresponds to the date that this 24-hour cycle of measurements concluded and {Time} is the number of hours, minutes, and seconds (in this format: HHMMSS) since this cycle of measurements began. For example, "ODEN-D20140903-T192153.raw" contains data recorded from the Icebreaker Oden taken during the 2014-09-03 cycle 19:21:53 after the cycle began.

本数据集提供的水柱背散射数据，采集自搭载于破冰船"奥德恩号"（Icebreaker Oden）的Simrad EK80宽带收发器（Wide-band Transceiver, WBT），搭配Simrad ES18-11科学型分裂波束回声测深仪，采集时段为SWERUS-C3 2014北极科考航次第二航段（瑞典-俄罗斯-美国北极气候-冰冻圈-碳相互作用考察，Swedish-Russian-US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions）期间。
该EK80宽带收发器由新罕布什尔大学（University of New Hampshire, UNH）专为本次科考项目安装于"奥德恩号"之上。
本次数据采集的频段范围约为16~29 kHz，可生成极高分辨率的水柱成像结果，能够区分甲烷气渗漏点处的单个气泡，以及水柱内包括温盐阶梯结构在内的精细尺度构造。
数据文件采用如下格式命名："ODEN-{Date}-{Time}.raw"。其中"ODEN"表明数据采集自破冰船"奥德恩号"；{Date}代表该24小时测量周期的结束日期，{Time}为该测量周期启动以来的时、分、秒（格式为HHMMSS）。例如，"ODEN-D20140903-T192153.raw"包含的是2014年9月3日测量周期启动后，于当日19时21分53秒采集自"奥德恩号"的观测数据。