Abstract
Atmospheric gravity wave induced airglow fluctuations of the hydroxyl OH Meinel and other bands are routinely observed using CCD imagers operating in the near infrared wavelength region. Farther into the infrared, the intensity of the OH emissions is much greater. Recently, a new IR imaging camera was modified for infrared viewing of the night sky with approximately 1 steradian field of view. The filter had a center wavelength of 1467 nm and a bandwidth of 177 nm to include components of the OH (Δv = 2) band. The images show good signal‐to‐noise ratios of 180 with 10 second exposures. Cross‐spectral and wavelet analysis were used to obtain spatial and temporal information about observed airglow fluctuations, and horizontal wavelengths and wave periods as short as 3.7 km and 3 min, respectively, were determined.
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