VERY HIGH-FREQUENCY TIDES OBSERVED IN THE AIRGLOW OVER EUREKA (80-DEGREES)

The absolute brightness and spectral distributions of OH airglow Meine l band near infrared emissions (1.0 mu-1.7 mu) were obtained from a Mi chelson Interferometer operating at Eureka (80 degrees 0' N 85 degrees 56' W), Canada, during polar night. A cross-spectral analysis of brig htness and rotational temperature data from December 1, 1993, to Decem ber 20, 1993, shows spectral features with periods near 12, 8, 6, 4, a nd 3 hours. The periods (tidal harmonics) and persistence (days to wee ks) of these features argue for a tidal interpretation. Tidal Hough fu nctions indicate that the dominant spectral features are most likely t he manifestation of zonally symmetric tides. The tides at Eureka exhib it a high degree of transience. There is a suggestion of an oscillatio n with a period close to 5 hours.