Physics
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11206303t&link_type=abstract
Journal of Geophysical Research, Volume 112, Issue A6, CiteID A06303
Physics
10
Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Dynamics, Ionosphere: Ionospheric Disturbances, Atmospheric Processes: Thermospheric Dynamics (0358)
Scientific paper
Measurements of ionospheric and thermospheric parameters obtained by the Challenging Minisatellite Payload (CHAMP) satellite were analyzed for the time period of the solar eclipse on 8 April 2005. We have analyzed the electron density and temperature, as well as the thermospheric mass density and the neutral wind velocity. Because of the location of the eclipse close to the equator, a study of the equatorial electrojet is also included. During closest approach, CHAMP passed the region of 30% obscuration. Significant modifications of the ionosphere at F2 layer altitudes could be observed. The plasma fountain at the equator is strongly enhanced, resembling post-sunset conditions. The thermospheric mass density and zonal wind show no eclipse-related effect. The equatorial electrojet strength is reduced by almost 40%. This is about twice the amount expected from E region electron depletion at the CHAMP footprint.
Forster Manuel
Lühr Hermann
Rentz Stefanie
Rother Martin
Tomás A. T.
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