6300 A Intensity Variations Produced by the Arecibo Ionospheric Modification Experiments
PITTSBURGH UNIV PA SPACE RESEARCH COORDINATION CENTER
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Nightglow 6300A intensity suppression and enhancement transients have been observed in conjunction with heating of the F region ionospheric electrons in Arecibo Ionospheric Modification Experiments I.M.E.. Ohmic heating of the electrons during X-mode propagation of the heating wave results in an approximately 1.3 suppression of intensity, in semi-quantitative agreement with the suppression predicted. The 6300A intensity enhancements associated with O- mode propagation of the heating wave are far too large to be produced by ohmic heating, suggesting electron acceleration by strong plasma waves generated by the heating rf wave. The Osinglet D lifetimes determined from the time constants of the 6300A intensity enhancement transients yield an F region quenching coefficient in good agreement with the Platteville I.M.E. and with laboratory results.
- Atmospheric Physics