Fig. 4.
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Top row: PS sample (left) and NN mean estimate from this same PS sample as input (right). Middle row: FE with respect to the mean PS obtained from an ensemble average of about 200 PS realisations for the sample (left) and 21cmPSDenoiser (right). Bottom row: error as a fraction of the HERA noise level at the same redshift for the sample (left) and for the 21cmPSDenoiser (right).
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