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sambit-giri / tools21cm

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Non-periodic data when using subvolumes from light-cones #33

Closed sambit-giri closed 1 year ago

sambit-giri commented 2 years ago

The power spectrum estimators use FFT to transform data from real to Fourier space. If the data is not periodic or has a sharp change at the boundary, it can introduce ripples during the transformation.

sambit-giri commented 1 year ago

During the validation of the power spectrum estimators by comparing them to the ps_eor package (#39), we introduced a new parameter called window, which can take window functions (blackmanharris, tukey or a custom window function) that can tapper the data along the non-periodic axis.