A summary of the key steps in the data analysis method.
|1||Thresholding the intensity image resulting in area and intensity time series.|
|2||Performing wavelet analysis on the area and intensity time series and identifying time intervals with strong oscillatory power.|
|3||Performing a FFT on each of the time intervals with strong power resulting in a phase difference between the area and intensity perturbation and the amplitude ratio A of the perturbations.|
|4||Using the phase difference to determine the wave mode (i.e. fast or slow).|
|5||Using the amplitude ratio A in combination with Eq. (1) to infer the phase speed.|
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