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Anisotropic diffusion of meteor trails due to the geomagnetic field over King Sejong Station (62.2°S, 58.8°W), Antarctica

  • Jong-Min Choi
  • Young-Sil Kwak
  • Yong Ha Kim
  • Changsup Lee
  • Jeong-Han Kim
  • Geonhwa Jee
  • Tae-Yong Yang
Original Article

Abstract

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.

Keywords

Meteor trail Anisotropic diffusion Antarctica 

Notes

Acknowledgements

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 (jmchoi@kasi.re.kr).

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Astronomy and Space ScienceChungnam National UniversityDaejeonSouth Korea
  2. 2.Korea Astronomy and Space Science InstituteDaejeonSouth Korea
  3. 3.Korea University of Science and TechnologyDaejeonSouth Korea
  4. 4.Korea Polar Research InstituteIncheonSouth Korea

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