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Jean Philippe Duvel and Jérôme Vialard

–April). The first shortcoming of this approach is the end effect problem inherent in the use of spectral techniques on short time series. These end effects must be reduced by a windowing (i.e., Welch window) but this will truncate/reduce the signal toward the edge of the series and thus reduce perturbations at the beginning and the end of the selected season (the ISV perturbations do not necessarily append in midseason). Increasing the size of the window to overcome this problem however induces a risk of

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