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Old 17-01-2019, 01:21 AM
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Stonius (Markus)
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Join Date: Mar 2015
Location: Melbourne
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Originally Posted by Merlin66 View Post
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))
Is it? I must be reading it wrong, because it looks to me like here are no 'Signal' terms, they are all Nsig which I assume means 'signal noise'. To make a ratio there must be some mention of the signal, surely?

What is NPix? Pixel noise is new to me. Does it have another name?


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