Fraser River Delta Upper Slope Imaging Rotary Sonar Deployed 2015-09-14

The Imagenex 881A Imaging Sonar 5714 was deployed on 2015-09-14 at Fraser River Delta Upper Slope. This site is located on the upper slope of the Fraser River delta, where depth is approximately 100 metres. This device is a Imaging Rotary Sonar. Imaging Rotary Sonars (IRS) are devices used in underwater mapping: imaging and profiling. An IRS transmits either conical or fan-shaped beam, and its range and resolution depends on the frequency and configuration of the device. Reflected signals, or echoes, are recorded and analyzed in order to develop an image of scanned area that includes information on the range between the sonar and the scanned object. It was deployed on a fixed platform. Data from this deployment were archived and made available through Ocean Networks Canada's Oceans 2.0 digital infrastructure, with quality assurance and derived data products following established practices.2015年9月14日，Imagenex 881A型成像声呐5714部署于弗雷泽河三角洲上斜坡（Fraser River Delta Upper Slope）。该点位位于弗雷泽河三角洲上斜坡区域，水深约100米。该设备为旋转成像声呐（Imaging Rotary Sonar，IRS），此类设备是用于水下测绘的专用装置，可实现成像与剖面探测功能。旋转成像声呐可发射锥形或扇形波束，其探测量程与分辨率取决于设备的工作频率与配置参数。设备会记录并分析反射信号（即回波），以此生成扫描区域的成像结果，该结果包含声呐与扫描目标之间的距离信息。本次部署采用固定式平台搭载该设备，采集得到的数据已完成归档，并通过加拿大海洋网络（Ocean Networks Canada）的Oceans 2.0数字基础设施对外共享；所有数据均遵循既定规范完成质量管控，并提供合规的衍生数据产品。