???

You are clearly getting some images at almost the diffraction limit of
your telescope. In the very sharpest images there are hints of diffraction
rings visible on the edges of the satellites. That is of course the
absolute limit of optical performance, and is only rarely attained.

Interestingly, the process you have, of using a high-quality imaging
system, with fast read-out, and then selecting the rare `perfect' images
is something which has been developed and applied somewhat by one of my