Disturbance of the airglow field in the thermosphere associated with the intrusion of large gas masses

Physics – Optics

Scientific paper

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Airglow, Atmospheric Optics, Gas Injection, Thermosphere, Gas Jets, Mass Flow, Supersonic Flow

Scientific paper

The paper presents an analysis of the formation of a dark spot (an atmospheric 'hole') in the resonant dayglow oxygen emission at 130 nm in the thermosphere in the case when a supersonic gas jet enters this region from above (e.g., from the thrusters of the Space Shuttle or the Buran, or from the vaporized matter of a 'small comet'). It is shown that, when the view is from above roughly along the jet, a mass flow of about 1 kg/sec is sufficient to cause a significant decrease in brightness in a spot with a diameter of about 50 km.

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