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Old 18-05-2016, 12:30 PM
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Shiraz (Ray)
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Location: ardrossan south australia
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Quote:
Originally Posted by Atmos View Post
There are thermal pockets in the atmosphere that change over the course of seconds to minutes. The atmosphere in fluid dynamics works as a convective system. Warmer thermal pockets will rise up causing localised seeing changes, depending on the size of these pockets, where they are in relation to where you're looking and temperature variations (greater thermal differences causes faster moving pockets).

Longer subs increase the chance of imaging through these pockets, ultimately each sub is only going to be as good as the poorest bit of seeing you had over that period.
that makes sense.

But, if I take 100 x 1second subs and a 10 second burst of bad seeing come through, I have 10 bad subs- wouldn't they then stuff up the final stack just as much as the same 10 seconds of bad seeing would stuff up a single 100 second sub? - I didn't discard any subs in this exercise.

Last edited by Shiraz; 18-05-2016 at 12:42 PM.
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