HR: 0800h
AN: SM21A-0327    [Abstracts]
TI: Properties of Chorus Emissions Observed by the Polar Plasma Wave Investigation
AU: * Sigsbee, K
EM: kristine-sigsbee@uiowa.edu
AF: University of Iowa, Department of Physics and Astronomy, 203 Van Allen Hall, Iowa City, IA 52241, United States
AU: Menietti, J D
EM: john-menietti@uiowa.edu
AF: University of Iowa, Department of Physics and Astronomy, 203 Van Allen Hall, Iowa City, IA 52241, United States
AU: Santolik, O
EM: ondrej.santolik@mff.cuni.cz
AF: Charles University, Fac. Mathematics and Physics, V Holesovickach 2, Prague, CZ-18000, Czech Republic
AU: Blake, J B
EM: JBernard.Blake@aero.org
AF: Aerospace Corporation, M2 259 POB 92957, Los Angeles, CA 90009, United States
AB: The orbit of the Polar spacecraft often skims along the boundary of the plasmapause as it travels from high latitudes down to the equatorial plane, and from the equator back to high latitudes again. This orbit provides a different perspective on the role of whistler mode chorus in accelerating radiation belt electrons from earlier studies using spacecraft such as CRRES, which was not polar-orbiting. From March 1996 to September 1997, the Polar Plasma Wave Investigation (PWI) made observations of plasma waves between frequencies of 0.1 Hz and 800 kHz. Although the time period when Polar PWI data were available was close to solar minimum, it included several well-studied geomagnetic storms, such as the January 10-14, 1997 International Solar- Terrestrial Physics (ISTP) event. We will examine the locations of chorus observations in the Polar PWI data set and explore how the intensity of chorus emissions depends upon magnetic local time, magnetic latitude, and L- shell. Possible correlations between chorus emissions and energetic electrons observed by the Polar Comprehensive Energetic Particle and Pitch Angle Distribution (CEPPAD) experiment will be presented. We will also discuss how chorus generation and the related electron acceleration processes depend upon the Kp and Dst geomagnetic indices.
DE: 2483 Wave/particle interactions (7867)
DE: 2730 Magnetosphere: inner
DE: 2774 Radiation belts
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting