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Hi Ray,
A most interesting presentation that does back up some of what I measured when chasing my blue fringing issue a while back.
Sorry if this sounds dense! But, when you write:
"The lower data shows the same HFR data, but with each value being the average of a block of 7 shorter subs (ie this data represents 21 minute subs)"
I question whether taking an "average" of 7 subs actually represents a 21 min sub taken during the same interval. Wouldn't the 21 min sub be more heavily weighted towards whatever was the worst moment of seeing during the exposure? Taking an average would seem to make the sub better than it might be. I guess I'm thinking about an analogy towards guiding when I write this. It doesn't take much guide error, or very long, to destroy a sub that "averaging" wouldn't fix. I'm pretty sure you will adjust my thinking!!
Peter
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