The extended SUMO version has in 2011 been operated during two field campaigns. The first one, in a wind farm close to Vindeby on Lolland, Denmark, was dedicated to the investigation of the effects of wind turbines on boundary layer turbulence. In spite of a few pitfalls related to configuration and synchronization of the corresponding data logging systems, this campaign provided promising results indicating the capability and future potential of small UAS for turbulence characterization in and around wind farms. The second one, the international BLLAST (Boundary Layer Late Afternoon and Sunset Transition) field campaign at the foothills of the Pyrenees in Lannemezan, France was focusing on processes related to the afternoon transition of the convective boundary layer. Here the SUMO turbulence system was flown to investigate the vertical structure of turbulence and its dependency on surface inhomogeneities.
The presentation will give a short overview on the technical development and first results from both campaigns.