electromagnetic environment

In telecommunication, the term electromagnetic environment (EME) has the following meanings: 1. For a telecommunications system, the spatial distribution of electromagnetic fields surrounding a given site. Note: The electromagnetic environment may be expressed in terms of the spatial and temporal distribution of electric field strength (volts/metre), irradiance (watts/metre²), or energy density (joules/metre³). 2. The resulting product of the power and time distribution, in various frequency ranges, of the radiated or conducted electromagnetic emission levels that may be encountered by a military force, system, or platform when performing its assigned mission in its intended operational environment. It is the sum of electromagnetic interference; electromagnetic pulse; hazards of electromagnetic radiation to personnel, ordnance, and volatile materials; and natural phenomena effects of lightning and p-static.

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d region
drift
drop (liquid)
drop and insert
dropout
dual access
dual in line package
duct
duobinary signal
duplexer
duty cycle

dynamic range
earth terminal complex
echo (mythology)
effective data transfer rate
effective earth radius
effective height
effective input noise temperature
effective mode volume
effective power
effective transmission rate
efficiency factor

eia interface
electrical length
electric field
electromagnetic compatibility
electromagnetic interference control
electromagnetic pulse
electromagnetic radiation hazard
electromagnetic survivability
electronic deception
electronic switching system
electronic warfare support measures

electro optic effect
electro optic modulator
electro optics
elliptical polarization
emphasis (telecommunications)
end distortion
end of transmission character
endurability
enhanced service
epoch date
equilibrium length