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Measurements are presented of the height profile of the volume emission rate of the P 1 (3) line of the (8-3) band of the hydroxyl airglow at latitudes of 40° N and 40° S as observed with the WINDII instrument on board the UARS satellite during the northern spring equinox in 1993. The emission layer peaks near 88 km during most of the night, with a half width of 6-8 km. The profile is slightly...
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