Wind and airglow variability in the mesopause region

Field widened Michelson interferometry applied to Doppler wind measurements in airglow is providing the means to observe winds at a precision of 1 - 3 m/s, temporal resolutions of minutes and horizontal spatial resolutions of less than 10 km. Two interferometers using this technique have been implemented, the E Region Wind Interferometer, ERWIN, (located at Eureka, Nunavut, 80N) and the Michelson Interferometer for Airglow Dynamics Imaging, MIADI, (located at Fredericton, New Brunswick, 45 N). The observation process and results from these two instruments and an all sky imager located in Eureka are described. The statistics of the wind observations are presented. Correlations between vertical winds and airglow variability exist and generally correspond to the expected phase relationship although there are some exceptions. Horizontal winds are quite variable and although at times features which can be interpreted as gravity waves are observed, they do not conform exactly to linear gravity wave theory.