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Of course you get (sort of) sub-arc second seeing....the question is...how long for? and over what aperture?
Paul, the resolution of your DS images is nothing unusual, hence I'd say you enjoy average seeing of about 2 arc sec (read: like the rest of the planet at sea level)
However seeing is not such simple a subject...
You are also probably getting small isoplanatic patches that regularly support sub arc second views....hence the great planetary images (interested readers can Google Babcock's work here).
However these patches can easily drift over larger scales during longer time periods, and also lose coherence at larger apertures.
Increasing the air density only makes this worse (ie sea level)
But to be blunt..I seriously doubt you get classically defined sub arc second seeing.
There is no co-incidence in the scientific community placing metre class optical telescopes at sites well *above* most of the atmosphere, and not at sea-level.
The seeing there is simply better.
Last edited by Peter Ward; 08-01-2014 at 08:42 PM.
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