Community:Email 10jan11

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Dear colleagues,

for all those who could not see the partial solar eclipse on January 4th it can be found as a quick look of ionospheric effects at the SWACI website http://swaciweb.dlr.de/index.php?id=285&L=1 Due to the reduced solar illumination the ionization develops delayed over Europe indicated by the negative TEC deviation from the corresponding 27days median. In addition to this reduction the eclipse caused probably a gravity wave which is clearly indicated by the time variation of the critical frequency and the equivalent slab thickness over the Juliusruh ionosonde station.

Deutsches Zentrum für Luft- und Raumfahrt e.V. in the Helmholtz-Association German Aerospace Center Institute of Communications and Navigation-- Dr. Michael Danielides Kalkhorstweg 53 D-17235 Neustrelitz Germany Tel. +49 (0)3981 480 - 204 Fax. +49 (0)3981 480 - 123 Email: Michael.Danielides@dlr.de Web: www.dlr.de/kn http://swaciweb.dlr.de


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