# Radar Countermeasures **Entity class:** Concept **Research spine:** [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software]] ## Definition Radar countermeasures are techniques for detecting, deceiving, saturating, or jamming an adversary's radar picture. ## Chronological Proximity They became a formal Allied research field in 1942 as the [[wiki/Radio Research Laboratory|Radio Research Laboratory]] was created. ## Relational Proximity [[wiki/Ferret Aircraft|Ferret aircraft]] found emitters; [[wiki/Window Chaff|Window]] generated clutter; and [[wiki/Carpet Jammers|carpet jammers]] denied particular frequencies. ## Collection Routes [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] · [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]] · [[wiki/Signals, Silos, and Sovereign Software|Signals, Silos, and Sovereign Software]] ## Sources / Provenance - [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software - Research]].