Fig. E.1.
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Relative error bars (left panel) and signal-to-noise ratio (right panel) obtained from measurements of the local variance and the 21 cm power spectrum with different realisations of the noise added to a 21cmFAST simulation. Two observational cases are considered: a maximum baseline of bmax = 65 km (upper panel), and one of bmax = 2 km (lower panel).
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