text: Military Terms
  electromagnetic environment — (DOD) The resulting product of the power and time distribution, in various
  frequency ranges, of the radiated or conducted electromagnetic emission levels encountered by a military
  force, system, or platform when performing its assigned mission in its intended operational environment. (JP
  3-85) Also called EME.
  electromagnetic environmental effects — (DOD) The impact of the electromagnetic environment upon the
  operational capability of military forces, equipment, systems, and platforms. (JP 3-85) Also called E3.
  electromagnetic hardening — (DOD) Action taken to protect personnel, facilities, and/or equipment by
  blanking, filtering, attenuating, grounding, bonding, and/or shielding against undesirable effects of
  electromagnetic energy. (JP 3-85)
  electromagnetic interference — (DOD) Any electromagnetic disturbance, induced intentionally or
  unintentionally, that interrupts, obstructs, or otherwise degrades or limits the effective performance of
  electronics and electrical equipment. (JP 3-85) Also called EMI.
  electromagnetic intrusion — (DOD) The intentional insertion of electromagnetic energy into transmission paths
  in any manner, with the objective of deceiving operators or of causing confusion. (JP 3-85)
  electromagnetic jamming — (DOD) The deliberate radiation, reradiation, or reflection of electromagnetic
  energy for the purpose of preventing or reducing an enemy’s effective use of the electromagnetic spectrum,
  and with the intent of degrading or neutralizing the enemy’s combat capability. (JP 3-85)
  electromagnetic masking — (DOD) The controlled radiation of electromagnetic energy on friendly frequencies
  in a manner to protect the emissions of friendly communications and electronic systems against enemy
  electromagnetic support measures/signals intelligence without significantly degrading the operation of friendly
  systems. (JP 3-85)
  electromagnetic probing — (DOD) Intentional radiation designed to be introduced into the devices or systems
  of an adversary for the purpose of learning the functions and operational capabilities of the devices or
  systems. (JP 3-85)
  electromagnetic protection — (DOD) Division of electromagnetic warfare involving actions taken to protect
  personnel, facilities, and equipment from any effects of friendly or enemy use of the electromagnetic spectrum
  that degrade, neutralize, or destroy friendly combat capability. (JP 3-85) Also called EP.
  electromagnetic pulse — (DOD) A strong burst of electromagnetic radiation caused by a nuclear explosion,
  energy weapon, or by natural phenomenon, that may couple with electrical or electronic systems to produce
  damaging current and voltage surges. (JP 3-85) Also called EMP.
  electromagnetic reconnaissance — (DOD) The detection, location, identification, and evaluation of foreign
  electromagnetic radiations. (JP 3-85)
  electromagnetic security — (DOD) The protection resulting from all measures designed to deny unauthorized
  persons information of value that might be derived from their interception and study of noncommunications
  electromagnetic radiations (e.g., radar). (JP 3-85)
  electromagnetic spectrum management — (DOD) The operational, engineering, and administrative
  procedures to plan and coordinate operations within the electromagnetic operational environment. (JP 3-85)
  electromagnetic spectrum operations — (DOD) Coordinated military actions to exploit, attack, protect, and
  manage the electromagnetic environment. (JP 3-85) Also called EMSO.
  electromagnetic spectrum superiority — (DOD) That degree of control in the electromagnetic spectrum that
  permits the conduct of operations at a given time and place without prohibitive interference, while affecting the
  threat’s ability to do the same. (JP 3-85)
  electromagnetic support — (DOD) Division of electromagnetic warfare involving actions tasked by, or under
  direct control of, an operational commander to search for, intercept, identify, and locate or localize sources of
  intentional and unintentional radiated electromagnetic energy for the purpose of immediate threat recognition,
  targeting, planning and conduct of future operations. (JP 3-85) Also called ES.
  electromagnetic vulnerability — (DOD) The characteristics of a system that cause it to suffer a definite
  degradation (incapability to perform the designated mission) as a result of having been subjected to a certain
  level of electromagnetic environmental effects. (JP 3-85) Also called EMV.
  electromagnetic warfare — (DOD) Military action involving the use of electromagnetic and directed energy to
  control the electromagnetic spectrum or to attack the enemy. (JP 3-85) Also called EW.
  electromagnetic warfare reprogramming — (DOD) The deliberate alteration or modification of electromagnetic
  warfare or target sensing systems, or the tactics and procedures that employ them, in response to validated
  changes in equipment, tactics, or the electromagnetic environment. (JP 3-85)
  electronic intelligence — (DOD) Technical and geolocation intelligence derived from foreign
  noncommunications electromagnetic radiations emanating from other than nuclear detonations or radioactive
  sources. (JP 3-85) Also called ELINT.