Derailments happen, they are a part of railroadin'. And while it is sometimes nice to look at and analysis the actual wreck, I argue that there is value in watching the sequence of events from an unconventional point of view. Here we a look of the derailment events from the train dispatcher's point of view. Key framed animation of the trains have been color coded with their radio recording's text on screen.
While this is not a copy of exactly the NS dispatcher sees, this is an interpretation of it from the fine folks with ATCS monitoring group. A brief explanation of what one sees in a dispatcher point of view:
White lines -- the tracks
Colored blocks (not a part of normal ATCS displays) -- trains, colored to match with the transcribed radio text
Colored circles (not a part of normal ATCS displays) -- people on the ground (conductors, maintenance of way, trainmaster, etc.)
This may be the first time you are seeing these types of images, displays, and graphs, and yes, there is a lot going on. I have tried to simplify it to the best of my ability but if something doesn't make sense to you, always feel free to ask in the comment section. I, or someone that knows a lot more than me in this field, would be more than willing to try and develop an answer for you.
Audio recordings from broadcastify's "Altoona Area Rail" feed.
Background graphics of train dispatching display courtesy of ATCS mon groups
Thumbnail from WTAJ's news report on said derailment
Key-framed animations of trains and transcribed radio transmissions texts all done by yours truly