HR: 09:00h
AN: SM51D-05    [Abstracts]
TI: Subionospheric VLF Signatures of Electron Precipitation Induced by Ducted Whistler-mode Chorus
AU: * Golkowski, M
EM: mag41@stanford.edu
AF: STAR Laboratory Stanford University, Packard Building 350 Serra Mall, Stanford, CA 94305 United States
AU: Inan, U S
EM: inan@stanford.edu
AF: STAR Laboratory Stanford University, Packard Building 350 Serra Mall, Stanford, CA 94305 United States
AB: Broadband VLF measurements at several distributed sites in Alaska at L shells of 4-5 and on ship board receivers at the magnetic conjugate point are used for observations of ducted chorus events occurring preferentially during quieting geomagnetic conditions. Observations include discrete rising frequency elements, quasi-periodic emissions and whistler triggered emissions. In addition, phase and amplitude of signals from VLF transmitters subionospherically propagating over great circle paths covering the same L-shells are used to detect burst electron precipitation associated with chorus emissions While association of chorus observations and energetic electron micro-bursts has previously been observed using other techniques (e,g., riometers), measurements of effects in the nighttime D-region over several distributed set of subionospheric VLF paths may allow a first assessment of the spatial extent of the most energetic component (> 100 keV) of such precipitation.
DE: 2455 Particle precipitation
DE: 2483 Wave/particle interactions (7867)
DE: 2716 Energetic particles: precipitating
DE: 2736 Magnetosphere/ionosphere interactions (2431)
DE: 2794 Instruments and techniques
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005