tptacek could be referring to the following video: https://www.youtube.com/watch?v=qsEjV8DdSbs https://www.youtube.com/watch?v=qsEjV8DdSbs This video does a g

tptacek could be referring to the following video: https://www.youtube.com/watch?v=qsEjV8DdSbs https://www.youtube.com/watch?v=qsEjV8DdSbs This video does a good job at explaining how the "UFO" is probably an infrared glare, hiding the hot object behind it, and rotating only because the camera rotates when tracking the target from left to right.