I viewed the Reno video in both dial up and broadband speeds. The broadband version is of greater detail. Ergo, the shedding debris event is better seen in broadband. FWIW The dislodged debris isn't a shuttle's length away from the rear of Columbia, so it hasn't had time to decelerate.
"Explosion" may not be the right word to use in describing what we are seeing. A puff, flash or flare seems apt. The thicker portion of the contrail is due to this event. The contrail remains constant throughout the video, except for the additional gaseous matter appearing after the puff, flare or flash.
viewed the Reno video in both dial up and broadband speeds. The broadband version is of greater detail. Ergo, the shedding debris event is better seen in broadband. FWIW The dislodged debris isn't a shuttle's length away from the rear of Columbia, so it hasn't had time to decelerate.I do not have a highspeed connection, so I cannot comment on the differences.
However, I can see no debris. Only contrail.
It is not out of the question that this film and the Utah film is the same event, from different angles.
The angle and distance on the nevada film is not showing much detail. The Utah film was very shaky and had focus issues.
The pic from the telescope in NM was fuzzy and full of overloaded pixels, and to make matters worse, the film of the foam strike was also out of focus.
It seems the gremlins are responsible.