Acoustic Doppler Current Profiler 150 kHz
Acoustic Doppler Current Profilers (ADCP) are hydroacoustic instruments, similar to sonars. ADCPs measure current speed and direction at multiple predetermined depths simultaneously. ADCPs use the Doppler effect of sound waves that are scattered by particles in seawater over a depth range.
The travelling time of sound waves gives an estimate of distance, and the increase (blue shift) or decrease (red shift) in frequency is converted into water current velocities.
RDI Teledyne Acoustic Doppler current profilers are configured to monitor water currents at several frequencies. The instruments contain sensors for temperature, pressure, tilt and compass heading. RDI ADCPs use four beams to measure current velocity so that the fourth beam/transducer can substitute for a blocked or damaged beam or it can be used to increase data accuracy. The RDI Quartermaster ADCP are instruments that monitor currents at 150 kHz and at ranges up to 340 metres. In our area we typically get good data to about half that range.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
|RDI Ocean Surveyor ADCP 150 kHz (SN 41897)||Ocean Networks Canada Offices|
|RDI Workhorse Quartermaster ADCP 150 kHz (9455)||Barkley Canyon|
|RDI Workhorse Quartermaster ADCP 150 kHz (SN 17457)||Marine Technology Centre|
|RDI Workhorse Quartermaster ADCP 150 kHz (SN 24623)||Strait of Georgia East Node|
|RDI Workhorse Quartermaster ADCP 150 kHz (SN 8497)||Marine Technology Centre|
|RDI Workhorse Quartermaster ADCP 150 kHz (SN 8580)||Strait of Georgia Central Node|
Click the instrument categories below for descriptions and lists of instruments belonging to that category.