[PDF] 6 Spectral Analysis -- Smoothed Periodogram Method

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Figure 6.6. <strong>Smoothed</strong> periodogram estimate of spectrum of Wolf sunspotnumber. Raw periodogram (points) smoothed by Daniell filters of length 7 and11. Bandwidth gives resolution of the spectral estimate. <strong>Spectral</strong> peak at 10.6years.Figure 6.7. Sketch of general shapes of white noise, AR(1) and AR(2) null continua.Notes_6, GEOS 585A, Spring 2013 10