Ionospheric effect of Leonid meteor showers at 70 km height

Details Ionospheric effect of Leonid meteor showers at 70 km height Ionospheric effect of Leonid meteor showers at 70 km height

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985angeo...3..113s&link_type=abstract

Annales Geophysicae (ISSN 0755-0685), vol. 3, Jan.-Feb. 1985, p. 113-117. Research supported by the University Grants Commission

Physics

2

D Region, Ionospheric Disturbances, Leonid Meteoroids, Low Frequencies, Meteoroid Showers, Electron Density (Concentration), Oxygen, Scattering, Wave Propagation

Scientific paper

The effect of the Leonid meteor showers in the ionospheric D-region has been investigated through the anomaly revealed in the amplitude record of a low-frequency (LF) signal at 40 kHz. Impulsive ionization due to meteoric particles produced an enhancement and a decrease in the amplitude of the LF signal during the day and night, respectively. From the characteristic durations of the enhancements it is found that the value off the electron attachment coefficient with neutral molecular oxygen is of the order of 10 to the -22 cu m/s. The amplitude was found to increase, on the average by 3 to 4 dB during the day and to decrease by 1.5 dB at night. When the Leonid meteor shower occurs, the Sanwa-Calcutta LF propagation path is affected for 15 hrs daily.

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