Anisotropic diffusion of meteor trails due to the geomagnetic field over King Sejong Station (62.2°S, 58.8°W), Antarctica
We analyzed meteor decay times measured by a VHF meteor radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) to study diffusion processes of the meteor trails above the altitude of ∼93 km. Above this altitude, where the atmospheric density is so dilute that collisions between trail ions and ambient molecules become rare, diffusion of a meteor trail can be greatly affected by the geomagnetic field, resulting in anisotropic distribution of measured decay times over the azimuthal and elevation angles. Our preliminary analysis confirm the anisotropic nature of meteor decay times due to geomagnetic field.
KeywordsMeteor trail Anisotropic diffusion Antarctica
This research was supported by the “Operation and application researches of Space Weather Research Center” project from the Korea Astronomy and Space Science Institute. This work was also supported by the Korea Polar Research Institute (PE18020). The meteor radar data at King Sejong Station are available by contacting Jongmin Choi (firstname.lastname@example.org).
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