HENSOLDT Twinvis is a passive radar that adds new dimension to the world of surveillance and situational awareness:

It cannot be located due to the absence of any transmitted energy and it does not need any emissions from targets to locate them.

Where conventional radar systems apply the same principle of emitting signals that are reflected by an object allowing the radar to visualise that object based on the echo received, Twinvis follows a radically different approach: The system uses existing electromagnetic energy from radio and TVbroadcast transmitters and evaluates their echoes when reflected by an object.

In the military field, Twinvis combines several advantages. In addition to its high mobility, the system itself remains invisible and therefore cannot be jammed or eliminated in a targeted action. At the same time, it can also be used to discover stealth aircraft which, due to their low observable technology, have until now remained undetectable for conventional radar systems.

More information at: https://www.hensoldt.net/products/rad...