Comparison of 3D turbulence measurements using three staring wind lidars and a sonic anemometer

max. 2000 char.): The goal is to compare lidar volume averaged wind measurement with point measurement reference sensors and to demonstrate the feasibility of performing 3D turbulence measurements with lidars. For that purpose three pulsed lidars were used in staring mode, placed so that their beams crossed close to a 3D sonic anemometer mounted at 80 m above the ground. The results show generally very good correlation between the lidar and the sonic times series, except that the variance of the velocity measured by the lidar is attenuated due to spatial filtering. The amount of attenuation can however be predicted theoretically. An abbreviated version of this report has been submitted to Meteorologische Zeithschrift.This work is partly financed through the UPWIND project (WP6, D3) funded by the European Commission. In no event will Risø National Laboratory or any person acting on behalf of Risø be liable for any damage, including any lost profits, lost savings, or other incidental or consequential damages arising out of the use or inability to use the results presented in this report, even if Risø has been advised of the possibility of such damage, or for any claim by any other party. ISSN 0106-2840 ISBN 978-87-550-3705-2 Contract no.: 1125052-01 Group's own reg. no.: Sponsorship: Cover : Pages: 14 Tables: 1 References: 8 Information Service Department Risø National Laboratory for Sustainable Energy Technical University of Denmark P.O.Box 49 DK-4000 Roskilde Denmark Telephone +45 46774004 [email protected] Fax +45 46774013 www.risoe.dtu.dk