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Berlin 2005 – scientific programme

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EP: Extraterrestrische Physik

EP 2: CAWSES

EP 2.8: Talk

Friday, March 4, 2005, 16:45–17:00, TU BH349

Thermospheric Winds and Densities Derived from the CHAMP Satellite STAR Accelerometer — •Vance Henize, Hermann Lühr, and Wolfgang Köhler — GeoForschungsZentrum, Potsdam

Observations from the STAR accelerometer onboard the CHAMP satellite provides the opportunity to investigate thermospheric dynamics in great detail. On its near-polar, low-Earth orbit (about 400 km), it is well suited to map the air density and winds at all latitudes. Extensive work is done to ensure cross-calibration between the along-track and cross-track axes of the accelerometer, taking into account the deviation angles of the satellite flight orientation, and using the periodic signature of the corrotation winds perpendicular to the orbit as a diagnostic. Among other features, thermal winds from dayside heating and density increases in the cusp region will be presented.

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