The BUV on AE 5 was used for a solar occultation measurement of atmospheric ozone. An observation was carried out during the morning twilight near 5¿N, December 17, 1976, at a fixed wavelength of 255.5 nm, and a profile between 49 and 82 km was obtained. The number densities determined by this measurement were 3.7¿1010 cm-3 at 50 km, 5.1¿109 at 60 km, 3.9¿108 at 70 km and 3.0¿107 at 80 km. No evidence of a high altitude secondary maximum was found. These concentrations are between a factor of 4 and 20 smaller than those midnight results reported from a Copernicus measurement, and similar to the values from the Krueger-Minzner Mid-Latitude Model above 55 km. These values may be as much as a factor of 2 less than the Krueger-Minzner Model below 50 km.