In this paper we describe some results of preliminary analysis of the ozone vertical distribution during the period of background stratospheric aerosol content (1995–1997). The maximum ozone concentration in the mean profile is observed at 18 km altitude. The ensemble variability has no distinct maximum in a given altitude range. Its monotonic decrease is observed from 15–16 km altitude to about 22.5 km altitude, and at higher altitudes the variability remains practically unchanged.