Images of airglow at 2800 ¿ were taken on the Spacelab 1 shuttle mission and have been interpreted to be solar resonant emission of magnesium ions. On two orbital passes, observations were made near the magnetic equator while observing in the 2800-¿ channel. The observations were made near the sunset terminator (~1800 LT), in winter (1983, day 335). Three separate emission clouds were observed, all of which extended well into the F region. The location of the clouds in horizontal space is shown. The processed images have been pseudocolored to highlight the intensity distribution in the clouds. Observations included clouds with apparent magnetic field aligned striations. Bright emissions were observed at the magnetic equator, at 12¿ north magnetic latitude, and at 12¿ south magnetic latitude. Cloud center brightnesses varied between 680 rayleighs and 1700 rayleighs. |