Acoustic sounding of diurnal variations and gravity waves in the planetary boundary layer

In the introductory part the paper presents some SODAR results on diurnal variations of different boundary layer structures from measurements during the KOPEX-experiment at a city station and a suburban station. In Sect. 1 the investigations about wave processes in the planetary boundary layer are discussed. The SODAR measurements were carried out in different international cooperations at the Kopisty Atmospheric Observatory of the Institute of Physics of the Atmosphere Prague (northern Czechoslovakia) in the year 1986 (KOPEX-86), at the Observatory Juliusruh of the Heinrich-Hertz-Institut Berlin at the island of Rügen (JULEX-87) and at the Meteorological Observatory of the nuclear power plant Jaslovske Bohunice in Slovakia, about 60 km north-east of Bratislava (JABEX-88).Formerly: Heinrich-Hertz-Institute, Berlin-Adlershof, Germany