The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 37 Issue 2
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- Pages.125.1-125.1
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- 2012
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- 1226-2692(pISSN)
Nonmigrating tidal characteristics in the thermospheric neutral mass density
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Kwak, Young-Sil
(Korea Astronomy and Space Science Institute) ;
- Kil, Hyosub (The Johns Hopkins University Applied Physics Laboratory) ;
- Lee, Woo-Kyoung (The Johns Hopkins University Applied Physics Laboratory) ;
- Oh, Seung-Jun (Space Environment Laboratory, Inc.) ;
- Yang, Tae-Yong (Korea Astronomy and Space Science Institute)
- Published : 2012.10.17
Abstract
The wave number 4 (wave-4) and wave number 3 (wave-3) longitudinal structures in the thermospheric neutral mass density are understood as tidal structures driven by diurnal eastward-propagating zonal wave number 3 (DE3) and wave number 2 (DE2) tides, respectively. However, those structures have been identified using data from limited time periods, and the consistency and recurrence of those structures have not yet been examined using long-term observation data. We examine the persistence of those structures by analyzing the neutral mass density data for the years 2001-2008 taken by the CHAllenging Minisatellite Payload (CHAMP) satellite. During years of low solar activity, the amplitude of the wave-4 structure is pronounced during August and September, and the wave-4 phase shows a consistent eastward phase progression of
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