Characteristic time scale auroral electrojet data

Details Characteristic time scale auroral electrojet data Characteristic time scale auroral electrojet data

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..617t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 7, p. 617-620

Physics

24

Auroral Electrojets, Time Series Analysis, Data Correlation, Power Spectra

Scientific paper

The structure function of the auroral electrojet (AE) time series shows that the AE time series is self-affine such that the scaling exponent changes at the time scale of approximately 113 (+/- 9) minutes. Autocorrelation function is shown to have scaling properties similar to those of the structure function. From this result it can be deduced that the time scale at which the scaling properties of the AE data change should equal the typical autocorrelation time of the AE data is 118 (+/- 9) minutes. The characteristic time scale of the AE data appears as a spectral break in their power spectrum at a period of about twice the autocorrelation time.

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