HR: 1330h
AN: SM23C-04    [Abstracts]
TI: Relativistic electron dropout events as observed concurrently by SAMPEX and GOES sensors: Relationships to plasmaspheric and ionospheric conditions
AU: * Baker, D N
EM: daniel.baker@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado 1234 InnovationDrive , Boulder, CO 80303-7814 United States
AU: Kanekal, S G
EM: Shrikanth.Kanekal@noaa.gov
AF: Laboratory for Atmospheric and Space Physics, University of Colorado 1234 InnovationDrive , Boulder, CO 80303-7814 United States
AU: Green, J C
EM: Janet.Green@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado 1234 InnovationDrive , Boulder, CO 80303-7814 United States
AU: Onsager, T G
EM: Terry.Onsager@noaa.gov
AF: NOAA Space Environment Center, 325 Broadway, Boulder, CO 80305 United States
AU: Foster, J C
EM: jcf@haystack.mit.edu
AF: Massachusetts Inst. of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 United States
AB: Recent attention has focused upon abrupt and deep "dropouts" of energetic electron fluxes at geostationary orbit as seen by GOES particle detectors. We have used data from SAMPEX sensors measuring E>2MeV electrons and concurrent data from GOES in a similar energy range to study such dropout events. We have identified 27 major events from 1998 to 2003 where SAMPEX and GOES saw corresponding sharp, deep relativistic electron deceases. In most instances SAMPEX data indicated dropouts extending across a broad swath of L-shells, often down to L~~3.0. We have compared these radiation belt signatures with penetration electric field data from the Millstone Hill radar system and the DMSP spacecraft and with total electron content (TEC) enhancement measurements made using the Global Positioning System (GPS). Such multi-platform data show the intimate relationships that exist between radiation belt, plasmaspheric, and ionospheric properties during strong geomagnetic events.
DE: 2716 Energetic particles, precipitating
DE: 2720 Energetic particles, trapped
DE: 2784 Solar wind/magnetosphere interactions
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly