HR: 1340h
AN: SA33A-1137    [Abstracts]
TI: An Examination of Space Weather Maps of the Low-Latitude Electron Density During the Halloween Storm
AU: * Garner, T W
EM: garner@arlut.utexas.edu
AF: Center for Ionospheric Research Applied Research Laboratories The University of Texas at Austin, F0252 P.O. Box 8029, Austin, TX 78713 United States
AU: Bust, G S
EM: engb@arlut.utexas.edu
AF: Center for Ionospheric Research Applied Research Laboratories The University of Texas at Austin, F0252 P.O. Box 8029, Austin, TX 78713 United States
AU: Gassuiran, T L
EM: gauss@arlut.utexas.edu
AF: Center for Ionospheric Research Applied Research Laboratories The University of Texas at Austin, F0252 P.O. Box 8029, Austin, TX 78713 United States
AB: The electron distribution changed significantly during the geomagnetic storm from October 28 through November 1, 2003. These changes are particularly noticeable in the equatorial regions. This presentation demonstrates these changes by examining synoptic scale space weather maps of the low-latitude electron density during the Halloween storm. Using the Ionospheric Data Assimilation Three Dimensional (IDA3D), a 3DVAR assimilation algorithm, available electron density ({\it e.g. in situ} satellite and ionosonde nmF2 ) and electron content ({\it e.g.} slant TEC from GPS ground stations) are combined into statistically minimized electron density maps of the synoptic-scale density distribution. These maps demonstrate a poleward spreading of the equatorial anomaly peaks and a reduction of the high-altitude and plasmaspheric electron densities from climatological values.
DE: 6982 Tomography and imaging
DE: 2415 Equatorial ionosphere
DE: 2435 Ionospheric disturbances
DE: 2467 Plasma temperature and density
DE: 2481 Topside ionosphere
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting