New advances in the calibration of Doppler current-meters and current profilers
Abstract
Doppler current profilers are used in oceanography to measure oceanic circulation, but also in hydrology to calculate the flow of rivers. They allow the retrieval of water masses profiles in terms of velocity and direction. Direction is obtained via an electronic compass and tilt sensors, while velocity is obtained by measuring Doppler pulses shifts back scattered by particles located in water cells allocated along the instrument's measurement range. For current-meters and low range current profilers, calibrations are possible in towing tanks. But, these calibrations are limited in maximum velocity and they are not applicable for long range profilers. In the last years, new techniques were developed to calibrate compass and tilt sensors of current-meters and current profilers in their mooring cages and to obtain in the laboratory the deviations in velocity of these instruments. This paper presents the existing methods and the new advances in the metrological mastering of these devices.
Event details
- Event
- MetroSea 2020
- Technical Committee
- TC19
- info@metrosea.org
- Place
- Naples, ITALY
- Time
- 5 October 2020 - 7 October 2020
- Website
- http://www.metrosea.org
- Proceedings
- https://www.imeko.org/publications/tc19-Metrosea-2020