期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2008
卷号：1
出版社：IOP Publishing
摘要：The 10-minute average horizontal wind speeds sensed with lidar and mast mounted
cup anemometers, at 60 to 116 meters altitude at HØvsØre, are compared. The
lidar deviation from the cup value as a function of wind velocity and wind shear
is studied in a 2-parametric regression analysis which reveals an altitude
dependent relation between the lidar error and the wind shear. A likely
explanation for this relation is an error in the intended sensing altitude. At
most this error is estimated to 9 m which induced errors in the horizontal wind
velocity of up to 0.5 m/s as compared to a cup at the intended altitude. The
altitude errors of focused range gated lidars are likely to arise partly from an
unaccounted shift of the weighting functions, describing the sample volume, due
to the range dependent collection efficiency of the focused telescope.
Possibilities of correcting the lidar measurements both for wind velocity and
wind shear dependent errors are discussed. The 2-parametric regression analysis
described in this paper is proven to be a better approach when acceptance
testing and calibrating lidars.
