Fraser River Delta Upper Slope Imaging Rotary Sonar Deployed 2019-09-15

The Imagenex 881A Imaging Sonar 5714 was deployed on 2019-09-15 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.伊马根克斯881A型成像声呐（Imagenex 881A Imaging Sonar）5714于2019年9月15日部署于弗雷泽河三角洲上斜坡（Fraser River Delta Upper Slope）。该测点位于弗雷泽河三角洲上斜坡区域，水深约100米。本次部署的设备为成像旋转声呐（Imaging Rotary Sonar，IRS），此类设备多用于水下测绘、成像与剖面探测工作。成像旋转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。系统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，其中包含声呐与扫描目标间的距离信息。本次部署将声呐搭载于固定平台之上。此次采集的数据集已通过加拿大海洋网络（Ocean Networks Canada）的Oceans 2.0数字基础设施完成归档并对外开放，且遵循行业既定规范完成了质量管控与衍生数据产品的制作。