Authors: P.R. Straus, G. Crowley, R.R. Meier, L.J. Paxton, D. Morrison,
P.C. Anderson, R. DeMajistre, H. Kil, Y. Zhang, A. B. Christensen
Affiliation: The Aerospace Corporation, Space Sciences Application Laboratory
October/November of 2003 was a period of unusually high geomagnetic activity driven by various types of solar forcing (flares, proton events, and CMEs). Changes in the state of the thermosphere and ionosphere during this time period were observed by the GUVI instrument on TIMED and GPS occultation sensors on the PICOSat and CHAMP satellites. We present these observations, together with TIMEGCM model simulations for this period to evaluate our understanding of the terrestrial impacts of solar forcing.