OBSERVATIONS OF O2 (1-SIGMA) AND OH NIGHTGLOW DURING THE ALOHA-90 CAMPAIGN

Two spectroscopic instruments, a 1/4 meter Ebert-Fastie spectrometer and a Michelson interferometer, were flown abroad the NCAR Electra during the ALOHA-90 campaign. These instruments were designed to carry out measurements of the brightness and rotational temperatures of the O2 Atmospheric (0-1) band and several OH Meinel bands simultaneously with sodium lidar observations. The spectrometer results taken during the nights of March 25 and March 31 are reported. Wave-like oscillations in both O2 and OH airglow brightnesses were clearly present during both flights and a strong positive correlation of OH band brightness with sodium column density was found. A slightly weaker correlation of O2 band brightness with sodium column density was also detected. The measured brightness ratio between the OH (7-4) and (7-3) bands is found to be 11.2 +/- 0.3, which is in good agreement with the calculated ratios of 12.8 by Mies [1974] and 10.2 by Langhoff et al. [1986].