Statistics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa31a1708c&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA31A-1708
Statistics
[2415] Ionosphere / Equatorial Ionosphere, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2437] Ionosphere / Ionospheric Dynamics, [2467] Ionosphere / Plasma Temperature And Density
Scientific paper
This report investigates the global midnight brightness distribution around 23:00 local time through FORMOSAT-2/ISUAL Satellite imaging observations. We focus on the OI 630.0 nm nightglow emission at ~250 km altitudes near the equator. The database used in this study includes data from 2007 to 2008. The data statistics are separated by the four seasons. The results show that the midnight brightness often occurs near the geographic equator. And the seasonal variations of the brightening locations are observed in a tendency to show up in the summer hemisphere. But the weaker nightglow brightness tends to appear from May to July. The observations presented here are also compared with modeled electron density based on the SAMI2 model. We suggest that the midnight brightness is contributed from not only pre-reversal enhancement but also from thermospheric midnight temperature maximum (MTM) effect.
Chang Tsao
Chen Alfred B.
Chiang Jung C.
Hsu Rue-Ron
Huang Tao
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