The generalized user's requirements to the sodar design are formulated based on the experience of using sodars. A brief description of a commercial version of the sodar developed at the Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences and its software are presented. Possibilities of processing of the obtained data are demonstrated. Sodar "ZVUK–1" is capable of monitoring temperature stratification of the boundary atmospheric layer up to the altitude of 500 m, measuring the structure constant of the temperature field and the mixing layer thickness. It is also capable of estimating the validity of the obtained results according to the signal–to–noise ratio.
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