Quote:
Originally Posted by RickS
Just considering shot noise, SNR improves with the square root of the total exposure time. If you have 4 hours and add another 4 then the SNR improves by approx 1.4 times. You doubled the time so the improvement is sqrt(2). If you added 12 hours to your 4 hours then the improvement would be 2 times. Just add 396 hours and your SNR will be 10 times better 
Unfortunately, with narrowband you're almost certainly not shot noise limited so the improvement will be less than I suggest above. |
Rick, I've done 8hrs O3 so far - if I added another 6 (and binned x2 as Greg suggested above - is that the same as 12 bin x1?) would that lead to a significant improvement in SNR?