Generic Methodology for Field Calibration of Nacelle-Based Wind Lidars
AbstractNacelle-based Doppler wind lidars have shown promising capabilities to assess power performance, detect yaw misalignment or perform feed-forward control. The power curve application requires uncertainty assessment. Traceable measurements and uncertainties of nacelle-based wind lidars can be obtained through a methodology applicable to any type of existing and upcoming nacelle lidar technology. The generic methodology consists in calibrating all the inputs of the wind field reconstruction algorithms of a lidar. These inputs are the line-of-sight velocity and the beam position, provided by the geometry of the scanning trajectory and the lidar inclination. The line-of-sight velocity is calibrated in atmospheric conditions by comparing it to a reference quantity based on classic instrumentation such as cup anemometers and wind vanes. The generic methodology was tested on two commercially developed lidars, one continuous wave and one pulsed systems, and provides consistent calibration results: linear regressions show a difference of ∼0.5% between the lidar-measured and reference line-of-sight velocities. A comprehensive uncertainty procedure propagates the reference uncertainty to the lidar measurements. At a coverage factor of two, the estimated line-of-sight velocity uncertainty ranges from 3.2% at 3 m
Share & Cite This Article
Borraccino, A.; Courtney, M.; Wagner, R. Generic Methodology for Field Calibration of Nacelle-Based Wind Lidars. Remote Sens. 2016, 8, 907.
Borraccino A, Courtney M, Wagner R. Generic Methodology for Field Calibration of Nacelle-Based Wind Lidars. Remote Sensing. 2016; 8(11):907.Chicago/Turabian Style
Borraccino, Antoine; Courtney, Michael; Wagner, Rozenn. 2016. "Generic Methodology for Field Calibration of Nacelle-Based Wind Lidars." Remote Sens. 8, no. 11: 907.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.