Anisotropic diffusion of meteor trails due to the geomagnetic field over King Sejong Station (62.2°S, 58.8°W), Antarctica
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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 (email@example.com).
- Dyrud, L.P., Oppenheim, M.M., Close, S., Hunt, S.: Interpretation of non-specular radar meteor trail. Geophys. Res. Lett. 29(21) (2002). https://doi.org/10.1029/2002GL015953
- Elford, W.G., Elford, M.T.: The effect of the Earth’s magnetic field on the lifetime of radar meteor echoes. Slovak. Acad. Sci. 71–74 (1999) Google Scholar
- Elford, W.G., Elford, M.T.: The Effective Diffusion Coefficient of Meteor Trails Above 100 km, pp. 357–359. ESA Publications Division, Noordwijk (2001). ISBN 92-9092-805-0 Google Scholar
- Holdsworth, D.A., Reid, I.M., Cervera, M.A.: Buckland Park all-sky interferometric meteor radar. Radio Sci. 39(5) (2004). https://doi.org/10.1029/2003RS003014
- McDaniel, E.W., Mason, E.A.: The Mobility and Diffusion of Ions in Gases. Wiley, New York (1973) Google Scholar