Boundary Pass Current Meter Deployed 2021-04-20

The Nortek Aquadopp Current Meter A3L8799 AQD13744 was deployed on 2021-04-20 at Boundary Pass. Boundary Pass is a strait located along the boundary between Washington State and British Columbia. It connects Haro Strait with the Strait of Georgia. This device is a Current Meter. Acoustic Current Meters (ACM) measure current speed and direction, using the Doppler Effect. Aquadopp current meters have a sensor head that contains 3 acoustic transducers, a tilt sensor, a temperature sensor and a pressure sensor. The instrument transmits a short pulse of sound, and then listens to its echo to measure the change in pitch or frequency. The change in pitch can determine the velocity of the current. It was deployed on a fixed platform. Data from this deployment were archived and made available through Ocean Networks Canada's Oceans 3.0 digital infrastructure, with quality assurance and derived data products following established practices.编号为A3L8799、AQD13744的Nortek Aquadopp海流计（Current Meter）于2021年4月20日部署在边界通道（Boundary Pass）。边界通道是坐落于华盛顿州与不列颠哥伦比亚省交界地带的海峡，连接哈罗海峡（Haro Strait）与乔治亚海峡（Strait of Georgia）。该设备为海流计，声学海流计（Acoustic Current Meters, ACM）依托多普勒效应（Doppler Effect）测量海流的流速与流向。Aquadopp海流计的传感器探头内置3个声学换能器、一枚倾斜传感器、温度传感器及压力传感器。仪器先发射短脉冲声波，随后接收回波以检测音调或频率的变化，通过音调变化即可推算海流流速。本次部署搭载于固定平台，采集所得数据已完成归档，并通过加拿大海洋网络（Ocean Networks Canada）的Oceans 3.0数字基础设施对外开放，其质量管控与衍生数据产品均遵循既定行业规范。