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Multifractals and their application to geospace data
(Master thesis; Mastergradsoppgave, 2008-06-02)
In this thesis I first introduce multifractal theory and mathematical concepts for multifractal analysis. Different methods
for different uses are described, with focus on a differentiating between coarse and fine theory approaches. Methods for
analysing time series are also described, more specificly a direct method based on the coarse theory analysis, the
wavelet transform modulus maxima ...
Plasma line studies in relation to Naturally Enhanced Ion Acoustic Lines (NEIALs)
(Master thesis; Mastergradsoppgave, 2008-06-02)
New to the ESR common programmes is the inclusion of plasma lines along with the standard ion power density spectrum. Using data from the IPY common programme, a programme that has been run all through the International Polar Year, we have gone through large amounts of analysed data trying to find periods in time that fulfils the known criteria for finding Naturally Enhanced Ion Acoustic Lines ...