Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51b1938m&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA51B-1938
Physics
[0335] Atmospheric Composition And Structure / Ion Chemistry Of The Atmosphere, [0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [0341] Atmospheric Composition And Structure / Middle Atmosphere: Constituent Transport And Chemistry, [0350] Atmospheric Composition And Structure / Pressure, Density, And Temperature
Scientific paper
Plasma temperature, composition and density observed below 500 km altitude during solar minimum by the ~13 degrees inclination C/NOFS satellite are studied. Based on the C/NOFS satellite observations from 2008 and 2009, the averaged longitudinal and seasonal distributions of the ion temperature (Ti), total ion density (Ni) and ion composition is studied in terms of local time, season, latitude, magnetic declination and solar flux intensity. The longitudinal variations of both Ti and Ni exhibit obvious seasonal dependence in different magnetic declinations in the morning and evening local hours. The electron temperature shows a steep rise in the early morning (well known as "morning overshoot"), a decrease after that and again an increase at ~18 hours (well known as "evening overshoot"). The extended solar minimum prevailing during the C/NOFS mission allows us to establish a baseline model of the quiescent seasonal variations of the topside equatorial ionosphere. The IRI measurements at ~500km altitude of the total ion density and temperature are compared with the C/NOFS measured parameters at the same altitude.
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