HR: 0800h
AN: SM31A-1208    [Abstracts]
TI: Correlation between Large-Amplitude Electric Field Signatures Observed by Polar and Cluster within the Terrestrial Plasma Sheet and Ground-Based Signatures of Substorm Onset
AU: * Bonnell, J W
EM: jbonnell@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 United States
AU: Mozer, F S
EM: fmozer@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 United States
AU: Angelopoulos, V
EM: vassilis@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 United States
AU: Angelopoulos, V
EM: vassilis@ssl.berkeley.edu
AF: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 United States
AU: Frey, H U
EM: hfrey@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 United States
AU: Mende, S
EM: mende@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 United States
AB: The precession of the Polar spacecraft orbit puts apogee (~9 Re) near the equator during 2000-2003 and allows correlative studies of electric fields and plasmas between Polar and the satellites of the Cluster constellation (apogee ~19 Re). This allows one to preview the sorts of radial and azimuthal alignments planned for the inner satellites of the THEMIS mission, and to better understand the relationships between the in-situ plasma and field measurements and the ground-based signatures of substorm onset. We have identified several dozen events spanning this interval where large-amplitude ($>$ 50 mV/m), temporally isolated, impulsive electric field fluctuations are identified on both Polar and Cluster. We compare the relative geomagnetic positions, timing, and amplitudes of each event as well as the relationship between those parameters and the ground-based (AE and magnetometer chain data) and orbital imaging signatures (IMAGE and Polar) of substorm onset.
DE: 2704 Auroral phenomena (2407)
DE: 2712 Electric fields (2411)
DE: 2724 Magnetopause, cusp, and boundary layers
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting