Other
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.547..501d&link_type=abstract
Proceedings of 'SOHO 13 - Waves, Oscillations and Small-Scale Transient Events in the Solar Atmosphere: A Joint View from SOHO a
Other
Sun, Corona, Oscillations
Scientific paper
In recent years, the analysis of quasi-periodic signals observed by satellites such as SOHO and TRACE has become increasingly important. So far, mostly standard methods have been used, such as Fourier analysis to identify the dominant frequencies and wavelet analysis to provide the time localisation of the various frequency components. We compare the temporal and frequency resolution of different `time-frequency' methods. In particular, the usefulness and robustness of wavelet analysis is investigated by varying the different parameters which characterise the `mother' wavelet. Both simple harmonic functions and intensity oscillations observed by TRACE are used to demonstrate the various advantages and disadvantages of the different methods.
de Moortel Ineke
Hood Alan William
Munday Sara
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