• Won, Young-In (Polar Research Center, Korea Ocean R&D Institute) ;
  • Cho, Young-Min (Polar Research Center, Korea Ocean R&D Institute) ;
  • Lee, Bang-Yong (Polar Research Center, Korea Ocean R&D Institute) ;
  • Kim, Jhoon (Space Division, Korea Aerospace Research Institute) ;
  • Chung, Jong-Kyun (Department of Astronomy and Space Sciences, Chungnam National University) ;
  • Kim, Yong-Ha (Department of Astronomy and Space Sciences, Chungnam National University)
  • Published : 1999.12.01


A Fourier Transform Spectrometer was used to study upper mesospheric thermodynamic by observing the hydroxyl(OH) emission. Rocket-born and satellited-born photometers place the peak emission near 87 km. The instrument was installed in February 1999 at King Sejong station ($62.22^{circ}S,301.25^{circ}E$), Antarctica and has been in routine operation since then. An intensive operational effort has resulted in a substantial data between April and June, 1999. A harmonic analysis was carried out to examine information on the tidal characteristics. The measured amplitudes of the 12-hour oscillation are in the range of 2.4-3.7 K, which are in resonable agreement with theoretical model outputs. The harmonic analysis also revealed 8-hour oscillation which is not expected from the traditional theoretical studies. In addition, the observed 8-hour oscillations are apparent and sometimes dominate the temperature variation in the upper mesosphere.



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