信噪比

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  • 参见[1]
  • The signal-to-noise ratio of an observation is:
s/n = Ct/[sqrt(sigma^2*n+t*(C-A*S))]

where C is the count rate from the object (photons per second), t the exposure time, sigma the read-out noise of each pixel, n the number of pixels on which the image falls, S the number of photons from the sky per unit solid angle, and A the solid angle subtended by the image.

  • Through-put Measurements and SNR[2]