Fig. 2
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(Left) Semi-regularly spaced sinusoidal wave with period Tsine = 12.90 h. The samples are gathered into 125 intervals of eight hours, spaced by N × 23.93 hours (with N = 1,2,3,4,...). (Right) Corresponding LS periodogram. The 95% confidence level is also indicated. It is also very low in this case as only a signal is given (no noise).
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