The diversion of radiation (thermal, electromagnetic, or nuclear) from its original path as a result of interaction or collisions with atoms, molecules, or larger particles in the atmosphere or other media between the source of radiation (e.g., a nuclear explosion) and a point some distance away. As a result of scattering, radiation (especially gamma rays and neutrons) will be received… (Read More →)

Measures to defend against TEMPEST attacks [CESG].

An optical fiber made with core and cladding materials that recover, within a specified period of time, a specified percentage of their intrinsic transparency after darkening from exposure to a radiation pulse.

Acronym for radar intelligence.

1. Telecommunication by modulation and radiation of electromagnetic waves.
2. A transmitter, receiver, or transceiver used for communication via electromagnetic waves.
3. A general term applied to the use of radio waves. [NTIA] [RR]

A controller that supports the wireless mobility management and wireless access call control functions. It serves one or more subtending radio port controllers and may be associated with one or more PCS switching centers. [After T
1. Rpt34-1994]

Radionavigation equipment, on board an aircraft or spacecraft, used to determine the height of the aircraft or the spacecraft above the Earth's surface or another surface. [NTIA] [RR]

The combining of wire circuits with radio facilities. [JP 1-02]

See baseband.

A radiation pattern from a directional antenna, such that the energy of the transmitted electromagnetic wave is confined to a small angle in at least one dimension.