On the probability distributions of SuperDARN Doppler spectral width measurements inside and outside the cusp

Details On the probability distributions of SuperDARN Doppler spectral width measurements inside and outside the cusp On the probability distributions of SuperDARN Doppler spectral width measurements inside and outside the cusp

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3122802f&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 22, CiteID L22802

Physics

2

Ionosphere: Ionospheric Irregularities, Ionosphere: Instruments And Techniques, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers

Scientific paper

The Doppler spectral width of backscatter from the SuperDARN HF radars has been routinely used to identify the ionospheric cusp. The probability distribution of spectral width values has been described as Gaussian (normal) in the cusp and exponential equatorward of it. Here we re-examine the empirical distributions and show that they are better described by a log-Lévy distribution in both the cusp and non-cusp regions, with the same Lévy index a ~ 1.85 but varying Lévy location parameter. The spectral width distribution may also be log-Lévy at other magnetic local times, but with generally different parameters.

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