Thread: Why is noise the square root of signal?
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Old 16-01-2019, 06:43 PM
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Merlin66 (Ken)
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Yeah, for convenience it's included in the bracket terms - so needs to be squared first.

The recognised equation for SNR (the "CCD equation") is:
SNR = Nsig/sqrt(Nsig+ Npix(Nsky+Ndark+(Nread)^2))
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