- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
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.
The division of data into isolated blocks for the purpose of reducing risk; e.g., the isolation of the operating system, application software , and files from one another in a storage device in order to provide protection against unauthorized or concurrent access. 2. A nonhierarchical grouping of sensitive information used to control access to data more finely than with hierarchical security classification alone.
Industry:Telecommunications
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 at such a point from many directions instead of only from the direction of the source.
Industry:Telecommunications
The distance, time, or number of bits between corresponding points, i.e., significant instants, in two consecutive frames.
Industry:Telecommunications
The distance from a transmitter at which the signal strength remains above the minimum usable level for a particular antenna and receiver combination. 2. A radio aid to air navigation that creates an infinite number of paths in space throughout a given sector or azimuth angle by various methods of transmission and reception of electromagnetic waves.
Industry:Telecommunications
The distance between the centers of consecutive scanning lines.
Industry:Telecommunications
The diffraction pattern of an electromagnetic wave, which pattern is observed close to a source or aperture, as distinguished from a far-field diffraction pattern. Note: The pattern in the output plane is called the near-field radiation pattern. Synonym Fresnel diffraction pattern.
Industry:Telecommunications
The distance between points of corresponding phase of two consecutive cycles of a wave. Note: The wavelength, , is related to the propagation velocity, v, and the frequency, f, by = v/f.
Industry:Telecommunications
The distance at which a direct radio wave can reach a receiving antenna of given height from a transmitting antenna of given height. Note: The radio horizon range in nautical miles, R, is given by the relation R = 1. 23 (ht1/2 + hr1/2,) where ht and hr are the heights of the transmitting and receiving antennas in feet. The radio horizon range, R, in nautical miles is also given by the relation R = 2. 23 (ht1/2 +hr1/2,) where ht and hr are the heights of the transmitting and receiving antennas in meters. The effective Earth radius, 4/3 times the actual Earth radius, is used in deriving the formulae. Second-order differentials are neglected. They are of the order of 0. 1%.
Industry:Telecommunications
The dispatching, for reception elsewhere, of a signal, message, or other form of information. 2. The propagation of a signal, message, or other form of information by any means, such as by telegraph, telephone, radio, television, or facsimile via any medium, such as wire, coaxial cable, microwave, optical fiber, or radio frequency. 3. In communications systems, a series of data units, such as blocks, messages, or frames. 4. The transfer of electrical power from one location to another via conductors.
Industry:Telecommunications
