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Authors: De Santis, A.* 
De Franceschi, G.* 
Perrone, L.* 
Title: Spectral and fractal analyses of geomagnetic and riometric antarctic observations and a multidimensional index of activity
Issue Date: Jun-1997
Series/Report no.: 9 / 59 (1997)
Keywords: spectral analysis
fractal analysis
polar geomagnetic and riometric data
multidimensional index
Subject Classification05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous 
05. General::05.01. Computational geophysics::05.01.04. Statistical analysis 
05. General::05.07. Space and Planetary sciences::05.07.02. Space weather 
Abstract: The Istituto Nazionale di Geofisica under the P.N.R.A. (National Program of Research in Antarctica) has the responsibility of acquiring geophysical observations at the Italian Antarctic Base of Terra Nova Bay. Among others, geomagnetic and riometric data can provide some new insights into local and global activity of the magnetosphere-ionosphere coupling. This article investigates some properties of these kinds of data by means of spectral and fractal analyses. In addition, a multidimensional index is derived from this single-point dataset to represent not only the local but also the global state of the magnetospheric activity.
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