First results of measurements with a newly-designed phased-array sodar with RASS

At a special measuring site for boundary-layer studies as well as land-surf ace processes the Meteorological Observatory Lindenberg of the German Weath er Service (DWD) has recently put into operation a newly-designed phased-ar ray SODAR/RASS, which has been developed by METEK on behalf of the DWD. Thi s system provides the vertical profiles of the three-dimensional wind vecto r in the boundary layer on an operational basis and is furthermore suitable for getting information on the profile of virtual temperature up to about 400 m in height based on the addition of RASS components. The following pap er describes both the technique of this SODAR/RASS and the various modes of operation as well as the different options in managing the system. First e valuations on the data availability concerning the maximum height coverage will give an impression on the system's capabilities. Finally, the accuracy of the derived profiles of winds and temperature will be investigated by m eans of comparisons of the SODAR/RASS data with measurements of a six-sonde tethered-balloon system as well as meteorological data of a 99 m tower in the vicinity of the system.