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Session 2 - Everything Else.
Display session, Friday, June 27
Ballroom C, Chair: Richard Canfield

[2.03] Helioseismic frequency determination using homomorphic deconvolution

F. Baudin (NSO/GONG), F. Hill (NSO/GONG)

Since the succesful launch of the SOHO mission and the completion of the GONG network, data of high quality are available in great quantity and must be analysed with the greatest care. When determining the spectral characteristics of the p-modes, the classical Fourier Transform is in general used. However, it has been shown to be inadequate because of the non-stationarities of helioseismic signals (excitation process of the p-modes). Alternative methods, which take this aspect into account, can be used, for example the ``homomorphic deconvolution'', which has shown promising results. In this work, the efficacy of this method is tested using both simulated and real (MDI/SOHO) data. The results will focus on the reliability of the frequency determination and precision, as solar p-modes frequencies are an important tool for soundin the solar interior, the more precise these frequencies are, the more efficient this sounding is.


Program listing for Friday