Distributed covert radar for low-altitude airspace protection.

RF interception detects drones by their radio link — but fails against the fastest-growing threat class: autonomous drones flying on GPS or inertial navigation with nothing to intercept. Active radar detects anything that flies — but is detectable, targetable, and expensive.

Ambrym builds passive radar nodes that exploit ambient signals to detect and track low-altitude airborne targets — with the detection power of radar, without the emission, the cost, or the signature.