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Chorus functional dependencies derived from CRRES data
Author(s) -
Spasojevic M.,
Shprits Y. Y.
Publication year - 2013
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/grl.50755
Subject(s) - chorus , local time , geomagnetic latitude , physics , amplitude , van allen probes , earth's magnetic field , van allen radiation belt , incoherent scatter , ionosphere , atmospheric sciences , plasmasphere , magnetosphere , computational physics , geophysics , plasma , mathematics , magnetic field , statistics , nuclear physics , quantum mechanics , art , literature
Using data from the Combined Release and Radiation Effects Satellite (CRRES) plasma wave experiment, we present quadratic fits to the mean of the wave amplitude squared, < B w 2 > , for lower and upper band chorus as a function of geomagnetic activity (Kp) and magnetic latitude ( λ ) for the midnight (21< MLT ≤3), dawn (3< MLT ≤9), and postnoon (12< MLT ≤15) sectors and present an ad hoc model for the prenoon (9< MLT ≤12) sector. The empirical models are valid for 4≤ L ≤7, | λ |<15° and Kp≤6 and quantify the dramatic difference in the latitudinal dependence of chorus as a function of local time and how that dependence varies with geomagnetic condition, critical parameters for calculating wave‐induced electron scattering rates. Our results are generally consistent with previous studies, and our key contribution is the quantification of wave properties in a manner that is easily incorporated into global quasi‐linear diffusion models.