Observations of hydrogen Lyman α emission from missile trails

Details Observations of hydrogen Lyman α emission from missile trails Observations of hydrogen Lyman α emission from missile trails

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...10410101h&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue A5, p. 10101-10110

Physics

4

Atmospheric Composition And Structure: Thermosphere-Composition And Chemistry

Scientific paper

The Naval Research Laboratory far ultraviolet experiment on board the OGO 4 satellite accidentally detected hydrogen Lyman α emission following the passage of missiles through the upper atmosphere. The deposition of hydrogenous exhaust products above 100 km results in a local enhancement of hydrogen, which resonantly scatters Lyman α radiation from the Sun and from the geocorona, and produces a far ultraviolet contrail. The observed local enhancement of radiation was as much as 37% above the natural background. All event detections took place at time intervals of 6 min to 10 hours following the passage of a missile or spacecraft. There was no opportunity to observe prompt emissions. We describe the observations of this unusual phenomenon and the implications for hydrogen production mechanisms.

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