- Industry: Telecommunications
- Number of terms: 29235
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
For a satellite orbiting the Earth, an orbit in the equatorial plane. Note: An equatorial orbit has an inclination angle of 0°.
Industry:Telecommunications
For a satellite orbiting the Earth, an orbit in which the projection of the satellite on the equatorial plane revolves about the Earth in the same direction as the rotation of the Earth.
Industry:Telecommunications
For a specific excitation condition, the length of multimode optical fiber necessary to attain equilibrium mode distribution. Note: Equilibrium length is sometimes used to refer to the longest such length, as would result from a worst-case, but undefined, excitation. Synonyms equilibrium coupling length, equilibrium mode distribution length.
Industry:Telecommunications
For a specific excitation condition, the length of multimode optical fiber necessary to attain equilibrium mode distribution. Note: Equilibrium length is sometimes used to refer to the longest such length, as would result from a worst-case, but undefined, excitation. Synonyms equilibrium coupling length, equilibrium mode distribution length.
Industry:Telecommunications
For a specified bandwidth of radiation consisting of a continuous frequency spectrum, the total power in the specified bandwidth divided by the specified bandwidth. Note: Spectral density is usually expressed in watts per hertz.
Industry:Telecommunications
For a supported performance parameter of a system, the value that establishes the minimum operational service performance level for the parameter. Note: A measured parameter value worse than the system operational threshold indicates that the system is in an outage state.
Industry:Telecommunications
For a supported performance parameter of a system, the value that establishes the minimum performance level at which the system is considered to remain in an operational state. Note: A measured parameter value better than the outage threshold indicates that the system is in a system operational state.
Industry:Telecommunications
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/meter,) irradiance (watts/meter2,) or energy density (joules/meter3. ) 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.
Industry:Telecommunications
For an antenna, the transition region--lying between the near-field region and the far-field region--in which the field strength of an electromagnetic wave is dependent upon the inverse distance, inverse square of the distance, and the inverse cube of the distance from the antenna. Note: For an antenna that is small compared to the wavelength in question, the intermediate-field region is considered to exist at all distances between 0. 1 wavelength and 1. 0 wavelength from the antenna. Synonyms intermediate field, intermediate zone, transition zone.
Industry:Telecommunications
For an antenna, the transition region--lying between the near-field region and the far-field region--in which the field strength of an electromagnetic wave is dependent upon the inverse distance, inverse square of the distance, and the inverse cube of the distance from the antenna. Note: For an antenna that is small compared to the wavelength in question, the intermediate-field region is considered to exist at all distances between 0. 1 wavelength and 1. 0 wavelength from the antenna. Synonyms intermediate field, intermediate zone, transition zone.
Industry:Telecommunications
