HR: 1340h
AN: NG23A-1190    [Abstracts]
TI: Intermittency Analyses on the SIERRA Measurements of the Electric Field Fluctuations in the Auroral Zone
AU: * Tam, S W
EM: wyt@space.mit.edu
AF: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 United States
AU: Chang, T
EM: tsc@space.mit.edu
AF: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 United States
AU: Kintner, P M
EM: pmk1@cornell.edu
AF: School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853 United States
AU: Klatt, E
EM: ek59@cornell.edu
AF: School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853 United States
AB: We perform intermittency analyses on the electric field data obtained by the SIERRA sounding rocket in the auroral zone. The electric field fluctuations are broadband, covering the extremely low-frequency range with a power-law relation, similar to the type of fluctuations commonly observed at various altitudes of the auroral region. Our preliminary analyses of the data based on the technique of probability distribution functions indicate that the electric field fluctuations are intermittent. Using the methods of wavelet analyses and local intermittency measures, we determine the degree of intermittency of the fluctuations at various scales. It is found that the electric field fluctuations are more intermittent at smaller scales.
DE: 7863 Turbulence
DE: 2407 Auroral ionosphere (2704)
DE: 2411 Electric fields (2712)
SC: Nonlinear Geophysics [NG]
MN: 2004 AGU Fall Meeting