- 行业: Government; Military
- Number of terms: 79318
- Number of blossaries: 0
- Company Profile:
Of or pertaining to the speed of a body in a surrounding fluid when the relative speed of the fluid is subsonic in some places and supersonic in others. This is encountered when passing from subsonic to supersonic speeds and vice versa.
Industry:Military
Cost estimating risk and schedule/technical risk. Cost estimating risk is the risk due to cost estimating errors and the statistical uncertainty in the estimate. Schedule/technical risk is risk due to inability to conquer the problems posed by the intended design.
Industry:Military
The science of measurement, including the development of measurement standards and systems for absolute and relative measurement. Used to determine conformance to technical requirements including the development of standards and systems for absolute and relative measurements.
Industry:Military
A material (e.g., smoke or chaff) used to conceal an object from observation by a radio or optical sensor. Smoke may be used to conceal an object from observation by an optical sensor, and chaff may be used to conceal an object from observation by a radio sensor (e.g., radar).
Industry:Military
A document prescribing the approach to be taken for intended testing activities. The plan typically identifies the items to be tested, the testing to be performed, test schedules, personnel requirements, reporting requirements, evaluation criteria, and any risk requiring contingency planning.
Industry:Military
The matching, in space (transverse coherence) or time (temporal coherence), of the wave structure of different parallel rays of a single frequency of electromagnetic radiation. This results in the mutual reinforcing of the energy of a larger beam. Lasers and radar systems produce partially coherent radiation.
Industry:Military
A generic term used to describe a family of equipment used to represent threat weapon systems in development testing, operational testing, and training. A threat simulator has one or more characteristics which, when detected by human senses or man-made sensors, provide the appearance of an actual threat weapon system with a prescribed degree of fidelity.
Industry:Military
The amount of energy of any radiation incident upon (or flowing through) unit area, perpendicular to the radiation beam, in unit time. The intensity of thermal radiation is generally expressed in calories per square centimeter per second falling on a given surface at any specific instant. As applied to nuclear radiation, the term intensity is sometimes used, rather loosely, to express the exposure (or dose) rate at a given location.
Industry:Military
SBIRS low altitude component consisting of SBIRS LEO satellites. The SBIRS Low component will be designed to provide precision midcourse tracking and discrimination data to support early interceptor commit, in-flight target updates, and target object maps for a National Missile Defense architecture. The SBIRS Low component will also support the other mission areas of the SBIR system. (Evolution of the Space and Missile Tracking System)
Industry:Military
1. A shared boundary defined by common physical interconnection characteristics, signal characteristics, and meanings of interchanged signals. 2. A device or equipment making possible interoperation between two systems, e.g., a hardware component or a common storage register. 3. A shared logical boundary between two software components. 4. A common boundary or connection between persons, or between systems, or between persons and systems.
Industry:Military
