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The cross-wavelet bispectrum instantaneous biphase 𝜙1 and instantaneous biamplitude A1 for bifrequency (1 Hz, 0.25 Hz)-peak 1, calculated with K=34 segments, 67% overlapping, Tm=8 s, Ge=0.001 and using fixed Morlet wavelet length of THF=40 s for high frequencies calculation using a 0.1 s time step. (a) and (b) are for the case of BWc121 and (c) and (d) are for the case of BWc222.
