# Electromagnetic environment

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In [telecommunications](/source/Telecommunications), the term **electromagnetic environment** (**EME**) has the following meanings:

1. For a telecommunications [system](/source/System), the spatial distribution of [electromagnetic fields](/source/Electromagnetic_field) surrounding a given site. The electromagnetic environment may be expressed in terms of the spatial and temporal distribution of electric [field strength](/source/Field_strength) ([volts](/source/Volt) per metre), [irradiance](/source/Irradiance) ([watts](/source/Watt) per square metre), or energy density ([joules](/source/Joule) per cubic metre).
1. The resulting product of the [power](/source/Power_(physics)) and [time](/source/Time) distribution, in various [frequency](/source/Frequency) ranges, of the radiated or conducted electromagnetic [emission](/source/Emission_(electromagnetic_radiation)) 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](/source/Electromagnetic_interference); [electromagnetic pulse](/source/Electromagnetic_pulse); hazards of [electromagnetic radiation](/source/Electromagnetic_radiation) to personnel, ordnance, and volatile materials; and natural phenomena effects of [lightning](/source/Lightning) and p-static.
1. All electromagnetic phenomena observable in a given location.[1]

## References

1. Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility, Article 3 (Definitions), paragraph 8.

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Adapted from the Wikipedia article [Electromagnetic environment](https://en.wikipedia.org/wiki/Electromagnetic_environment) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Electromagnetic_environment?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.