Structure function as a tool in AE and Dst time series analysis

Details Structure function as a tool in AE and Dst time series analysis Structure function as a tool in AE and Dst time series analysis

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..635t&link_type=abstract

Geophysical Research Letters, Volume 22, Issue 5, p. 635-638

Physics

14

Magnetospheric Physics: Current Systems, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: General Or Miscellaneous

Scientific paper

A new method to analyse the structure function (SF) has been constructed and used in the analysis of the AE time series for the years 1978-85 and Dst time series for 1957-84. It is shown that this SF analysis makes a clear distinction between affine and periodicity dominated time series, and it displays the essential periodicities of the series in a range relevant to its characteristic time scale. The AE time series is found to be affine such that the scaling exponent changes at a time scale of 113 (+/-9) minutes. On the other hand, in the SF function analysis, the Dst data are dominated by the 24-hour and 27-day periods. The 27-day period is modulated by the annual variation.

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