Solar Mesosphere Explorer (SME) ozone data were analyzed for short-term periodic oscillations in the altitude region from 50 to 90 m. A 5-day oscillation was found to be a dominant feature at high southern latitudes near the December solstice in the altitude range from 50 to 80 km. The wave feature appears to travel westward with a speed consistent with that of a wave number one planetary-scale oscillation circling the globe in 5 days. The amplitude also appears to be consistent with the temperature oscillations predicted by Geisler and Dickinson (1976). This oscillation was not found to be a dominant feature in SME ozone during northern hemisphere summer. ¿ American Geophysical Union 1990