Does anyone have any idea what is happening here? This was posted to a respected astro imaging forum.
Link to full video...
http://www.azstarman.net/strange_sky.mp4
Are you sure that the differences are not due to ocean swells or in the case of the sailboat, the boat heeling?
Did you do the trigonometry to ensure that the results make sense? If so would you please post same as a follow up?