Researchers analysed all 112 PURSUE sensor videos — how much can the footage actually tell us about velocity?

A recent preprint by Jacob Haqq-Misra and Ravi Kopparapu looks at all 112 sensor videos released through PURSUE and asks a fairly basic-sounding question that turns out to be surprisingly difficult: How fast are the objects actually moving? The important distinction is between movement across an image and physical movement through three-dimensional space. To derive physical velocity, the researchers need information including range to the object, movement of the observing platform, aspect ang...