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Investigatng MultIfractality of Solar Irradiance Data Through Wavelet Based MultIfractal Spectral Analysis

Author(s): Dipendra Nath | Koushik Ghosh | Mofazzal Hossain Khondekar

Journal: Signal Processing : An International Journal
ISSN 1985-2339

Volume: 3;
Issue: 5;
Start page: 83;
Date: 2009;
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Keywords: Wavelet transform | multifractal dimension | Earth Radiation Budget Sattelite(ERBS) | Hölder exponent | Singularity spectrum | WTMM

It has been already revealed that the daily Solar Irradiance Data during the time period from October, 1984 to October, 2003 obtained by Earth Radiation Budget Satellite (ERBS) exhibits an Anti-persistent trend having multi-periodic phenomena. The solar irradiance time series data being a complex non linear signal in this paper we have tried to detect the irregularity and multifractality in the signal using continuous wavelet transform modulus maxima(WTMM) algorithm. Singularity spectrum of the signal has been obtained to measure the degree of multifractality of the Solar Irradiance signal.
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