MTM (Multi-Taper Spectral Analysis Methods) is a method for calculating spectral estimates. It is a simple set of subroutines in ANSI-C for multiple taper spectrum estimation. The multitaper approach provides an optimal spectrum estimate by minimizing spectral leakage while reducing the variance of the estimate by averaging orthogonal eigenspectrum estimates. The orthogonal tapers are Slepian np prolate functions used as tapers on the windowed time series. Since the taper functions are orthogonal, combining them to achieve an average spectrum does not introduce spurious correlations as standard smoothed single-taper estimates do.

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ANSI-C compiler

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ANSI-C compiler

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