On the basis of low-frequency D1 wind measurements, height-time cross sections for mean winds and semidiurnal tidal motions were constructed as averages for the years 1983--1986. Very good agreement was found with the results of other authors, some of which were available in a similar type of representation. The method discussed is of sufficient accuracy and reliability, with a favorable cost-benefit ratio. It is suitable for continuous low-cost monitoring of wind fields in the upper mesosphere/lower thermosphere region at medium latitudes. ¿ American Geophysical Union 1988