Berlin 2005 – wissenschaftliches Programm
EP 2.8: Vortrag
Freitag, 4. März 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.