Rocket-borne measurements of horizontal structure in the OH(8,3) and NA D airglow emissions

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Scientific paper

The MULTIFOT airglow payload included 4 side-looking instruments which measured the OH(8,3) band and Na D line emissions. For much of the rocket flight the photometers were well above the emission layers, so that the 4 rps rotation of the rocket payload resulted in a raster scan of the emission layers by the fields of view of the side-looking photometers. The combined effects of the mean vehicle motion, payload rotation, and coning, resulted in the scanning of an area more than 600 km in the E-W direction and 800 km in the N-S direction. The airglow intensities show horizontal variations by as much as a factor of two. In the case of the OH emission a localised area of enhanced emission involved an increase in intensity of around 50% over a horizontal distance of only 20 km. The observed horizontal variations do not appear to be associated with gravity wave propagation.

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