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[ascl:2202.002] NWelch: Spectral analysis of time series with nonuniform observing cadence

NWelch uses Welch's method to estimate the power spectra, complex cross-spectrum, magnitude-squared coherence, and phase spectrum of bivariate time series with nonuniform observing cadence. For univariate time series, users can apply the Welch's power spectrum estimator or compute a nonuniform fast Fourier transform-based periodogram. Options include tapering in the time domain and computing bootstrap false alarm levels. Users may choose standard 50%-overlapping Welch's segments or apply a custom-made segmentation scheme. NWelch was designed for Doppler planet searches but may be applied to any type of time series.

Code site:
https://github.com/sdrastro/NWelch
Described in:
https://ui.adsabs.harvard.edu/abs/2022arXiv220113342D
Bibcode:
2022ascl.soft02002D

Views: 2098

ascl:2202.002
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