ELINT

ELINT stands for ELectronic Signals INTelligence, and refers to intelligence-gathering by use of electronic sensors.ELINT primarily focuses on non-communications signals intelligence. Signal identification is performed by analyzing the collected parameters of a specific signal, and either matching it to known criteria, or recording it as a possible new emitter. ELINT data is usually highly classified information, and is protected as such.
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Noun
1. intelligence derived from non-communications electromagnetic radiations from foreign sources (other than radioactive sources)
(synonym) electronics intelligence
(hypernym) signals intelligence, SIGINT

Acronym for electronics intelligence.

Technical and geolocation intelligence information derived from foreign noncommunications electromagnetic radiations emanating from other than nuclear detonations or radioactive sources. [JP1]

Electronic Intelligence or Electromagnetic Intelligence
  

Electronic signals of non-communicational nature