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.

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.

Researchers at the Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR are breaking new ground in avalanche detection. Passive radar—which uses signals from the new Starlink ...