CRRES electric field power spectra and radial diffusion coefficients

Author: Alan G. Ling, G.P. Ginet, J. N. Bass, D. H. Brautigam, J. M. Albert, J. R. Wygant and D. E. Rowland
Date: 
February 25, 2005
Type: 
Journal Article
Venue: 
Journal of Geophysical Research
Citation: 

Brautigam, D.H., G.P. Ginet, J.M. Albert, J.R. Wygant, D.E. Rowland, A. Ling, and J. Bass (2005), CRRES electric field power spectra and radial diffusion coefficients, J. Geophys. Res. 110, A02214, doi:10.1029/2004JA010612

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 Lb 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 DLL E is computed from the power spectra. The model average DLL 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.

 

In 2005 AER acquired Radex, Inc., and research by Ling, A., is intellectual property of AER.