Abstract
Near infrared spectra of a NLC display are compared with spectra from the normal twilight sky for the regions 7850 to 9000 Å and 2.8 to 4.2 μ showing that NLC's are scatterers of solar radiation. Airglow hydroxyl rotational temperatures and intensities were monitored for several nights before and after the display but show no obvious correlation in behavior with this single NLC occurrence.

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