LF radio absorption events during major meteor showers in relation to ionization of different meteoric constituents

Physics – Space Physics

Scientific paper

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Atmospheric Ionization, Electromagnetic Absorption, Low Frequencies, Meteoritic Composition, Meteoroid Showers, Radio Attenuation, Abundance, Atmospheric Attenuation, Atmospheric Scattering, Daytime, Meteor Trails, Night, Radio Meteors

Scientific paper

A series of statistical analyses are made of low frequency signal strength data collected during periods of principal meteor showers during the course of one year. Both daytime and nighttime signal frequency effects are considered. By plotting the normalized ratio of the attack and recovery times as a function of normalized attack time, several distinct straight lines with very low scatter are obtained. The slope of the lines decreases gradually from the top. This indicates that a meteor's ionized trail would dissipate in a particular manner, and that the time variation of such dissipation (either daytime or nighttime) is a function of the relative abundances of the trail's different positive ions, rather than ambient ionization. It is suggested that an additional study of very high frequency scatter signal, from both the meteor and the trail, may yield further information concerning meteor ionization.

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