airborne self-protection jammer
Also found in: Acronyms.
airborne self-protection jammer[′er‚bȯrn ¦self·prə′tek·shən ‚jam·ər]
An electronic system carried by an aircraft to prevent detection by enemy radar, by both emitting signals that obscure radar returns and disguising the jamming signal itself.
airborne self-protection jammer (ASPJ)
An ECM (electronic countermeasure) system that jams the signal of hostile radar and thus provides protection to the mother aircraft only. Any protection to other aircraft in the formation is incidental. The jammer first detects the radiation of enemy emitters and compares it with its integral threat library. If the transmission either is confirmed to be hostile or is an unknown threat, the jammer radiates and jams the enemy receiver(s) and thus attempts to protect the aircraft.