Abstract
Spectrophotometric airglow intensity measurements of OH Meinel (6,1), (7,2) bands, OI 6300 Å, hydrogen H α and several O 2 Herzberg I bands were taken aboard NASA's Convair 990 Airborne Laboratory during February and March 1968. In addition, OI 5577 Å and 6300 Å were monitored photometrically along the same line-of-sight. The results of a total of 28 hr under non-auroral conditions are presented, representing geographical variations from 10° North to 80° North latitude and local time variations from 1930 to 0430 hr. The OH, OI 5577 Å and O 2 features show a degree of covariation in intensity. An enhancement of the OH intensity near midnight was seen to be accompanied by a stronger correlation of OH with 5577 Å. After 0200 hr LT, daily and latitude fluctuations in the hydroxyl intensity tended to disappear, the intensity also becoming independent of 5577 Å.
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