CRRES electric field power spectra and radial diffusion coefficients | Zendy

Brautigam D. H. | Zendy; Ginet G. P. | Zendy; Albert J. M. | Zendy; Wygant J. R. | Zendy; Rowland D. E. | Zendy; Ling A. | Zendy; Bass J. | Zendy

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CRRES electric field power spectra and radial diffusion coefficients

Author(s) -

Brautigam D. H.,

Ginet G. P.,

Albert J. M.,

Wygant J. R.,

Rowland D. E.,

Ling A.,

Bass J.

Publication year - 2005

Publication title -

journal of geophysical research: space physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.67

H-Index - 298

eISSN - 2156-2202

pISSN - 0148-0227

DOI - 10.1029/2004ja010612

Subject(s) - electric field , physics , spectral line , spectral density , diffusion , field (mathematics) , computational physics , range (aeronautics) , atomic physics , quantum mechanics , materials science , mathematics , statistics , pure mathematics , composite material

Combined Release and Radiation Effects Satellite (CRRES) Electric Field Instrument (EFI) data are used to determine the electric field power spectral density as a function of L and Kp over the frequency range 0.2 to 15.9 mHz. The power at each frequency is fit to the function P(L, Kp) = a L b exp(cKp). Assuming a purely electrostatic field and making several other assumptions regarding the azimuthal dependence of the field fluctuations, a Kp‐dependent radial diffusion coefficient D LL E is computed from the power spectra. The model average D LL E for high activity (Kp = 6) are between 1 to 2 orders of magnitude larger than that for low activity (Kp = 1), dependent upon L and first invariant.

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