Unlike active radar systems which use a specific radio source to look for reflections, this system is a passive radar system that uses radio waves already present in the environment to track objects.

"Passive radar sounding offers a valuable ... The researchers hypothesize that this method could use UKR reflective waves to study Miranda, Ariel, Umbriel, Titania, and Oberon while learning ...

Monitoring traffic with this passive radar will not do a thing to slow drivers down, but it’s a pretty cool hack that will at least yield some insights into traffic patterns. The principle ...