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Climatology of longitudinal structure observed in the TOPEX TEC measurements

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Climatology of longitudinal structure observed in the TOPEX TEC measurements
Other Titles
TOPEX TEC 자료를 이용한 경도에 따른 전리층 변화 연구
Kim, E.
Kim, Yong Ha
Jee, Geonhwa
Climatology; Ionosphere; Ionosphere-lower atmosphere co; Space Physics; Space Weather
Issue Date
Kim, E., Kim, Yong Ha, Jee, Geonhwa. 2007. Climatology of longitudinal structure observed in the TOPEX TEC measurements. 한국우주과학회. 한국우주과학회. 2007.10.26~.
Since the launch on 10 August 1992, the TOPEX/Poseidon mission provided an extensive database of vertical TEC over the ocean until it ended its mission on October 2005. Data from about 14 years of TOPEX TEC observations were analyzed to study the climatology of longitudinal structure at low and middle latitude regions. For the analysis, TEC data were binned by season and solar activity for geomagnetically quiet conditions (Kp < 2) to create TEC maps in magnetic latitude and longitude for several local time sectors. These maps show not only the annual and semiannual anomalies well-known from climatological studies of NmF2, but also the wavenumber-4 structure of the equatorial anomaly. In particular, the latter is the ionospheric feature recently identified from satellite measurements and closely correlated with the longitudinal structure of the vertical E×B drift. Furthermore, this strongly indicates the coupling between the upper atmosphere and the lower atmosphere.
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