Correlation spectra practical significance

The real part (vj, V2) of the complex cross correlation function is referred to as the synchronous spectrum, while the imaginary part 9 (vi, V2) is called the asynchronous spectrum. The practical significance of the correlation spectra related to applications in physical science and the step-by-step derivation of the above equation central to the two-dimensional correlation analysis are provided in this appendix. 

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