New Advice On Speed Sensor Calibration From Tow-Tank Tests Of Aanderaa Rcm8 Instruments ...

• Main Authors: Read, John, Medler, Ken
• Format: Conference Object
• Language: unknown
• Published: ASC 2001 - W - Theme session 2024
• Subjects: Oceanic Northeast Atlantic ICES Ecoregion; Ecosystem observation, processes and dynamics; Greenland; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636320.v1; https://ices-library.figshare.com/articles/conference_contribution/New_Advice_On_Speed_Sensor_Calibration_From_Tow-Tank_Tests_Of_Aanderaa_Rcm8_Instruments/25636320/1

No abstracts are to be cited without prior reference to the author.As part of its general investigation of instrumental data quality, the EC-VEINS project workshop in November 1998 recommended the joint processing by CEFAS of all German, Finnish and British Aanderaa RCM8 current meter records from the VEINS array off SE Greenland. These instruments all have the “paddle wheel” type of speed sensor but the joint processing of their records revealed significant differences in derived flow speeds due to differences in the value assumed for rotor pitch in the speed equation.The Institut fur Meereskunde, University of Hamburg, employs the rotor pitch value of 46.5 supplied by the manufacturer, whereas CEFAS apply their own long-established standard value of 42 both to their own instruments and to those that they process on behalf of the Finnish Institute for Marine Research, Helsinki. These different assumed values result in a difference of around 10% in the calculated speeds, the CEFAS value being the lower.Once ...