ternary signalA signal that can assume, at any given instant, one of three significant conditions, such as power level, phase position, pulse duration, or frequency.
terrestrial radiocommunicationAny radiocommunication other than space radiocommunication or radio astronomy. [NTIA] [RR] [47CFR]
terrestrial stationA station effecting terrestrial radiocommunication. [47CFR] In these [Radio] Regulations, unless otherwise stated, any station is a terrestrial station.
TESSETest Environment Support System Enhancement. 296
Test and ControlThe ISTC Test and Control provides the human interface for testing system hardware and software.
Test and Evaluation (T&E)Process by which components or systems are tested and the results evaluated to assess progress of design, performance, supportability, etc.
Test and Evaluation Master Plan (TEMP)An overall test and evaluation plan, designed to identify and integrate objectives, responsibilities, resources, and schedules for all test and evaluation…
Test and Evaluation Working Group (TEWG)The TEWG is the forum in which T&E coordination for test requirements, planning, execution, and reporting, is accomplished among members of the…
test and validationPhysical measurements taken (a) to verify conclusions obtained from mathematical modeling and analysis or (b) for the purpose of developing mathematical…
test antennaAn antenna of known performance characteristics used in determining transmission characteristics of equipment and associated propagation paths.
test centerSee patch and test facility, technical control facility.
Test CriteriaStandards by which test results and outcome are judged.
Test Integration Working Group (TIWG)A working group designed to facilitate the integration of test requirements in order to minimize development time and cost and preclude duplication…
test keyKey intended for testing of COMSEC equipment or systems. [INFOSEC-99]
Test PlanA document prescribing the approach to be taken for intended testing activities.
test pointA point within a piece of equipment or an equipment string that provides access to signals for the purpose of fault isolation.
Test Target Vehicle (TTV)Single stage, ground launched, solid propellant theater target developed for SMD Program. Also called Aries.
test toneA tone sent at a predetermined level and frequency through a transmission system for test purposes, such as for facilitating measurements and for aligning…
Test ValidityThe degree to which a test accomplishes its specified goal.
TestbedA system representation consisting partially of actual hardware and/or software and partially of computer models or prototype hardware and/or software.
Testline CoordinatorThe contact person who coordinates the updating and distribution of testline information for their company and is responsible for providing testline…
textA "string" or "file" containing primarily printable characters.
Text AdA text ad is a concise, action-oriented copy describing the product or service that is being advertised.
text analysisThe process of extracting semantics and other information from text to enhance the retrievability of data in a collection.
text analysis engineA software component that is responsible for finding and representing context and semantic content in text.
Text attribute table (TAT)Text attribute table for an annotation subclass in a coverage. In addition to user-defined attributes, the TAT contains a sequence number and text feature…
Text Link AdsAdvertisements which are formatted as text links. Since the web was originally based on text and links people are typically more inclined to pay attention…
text symbolA text style defined by font, size, character spacing, color, and so on, used to label maps and coverage features in ARC/INFO.
text-based scoringThe process of assigning an integer value to a document that signifies the relevance of the document with respect to the terms in a query.
text-to-speechPertaining to technologies for converting textual (ASCII) information into synthetic speech output.
The Cloudis 'the Internet', or 'the Grid', or 'Utility Computing' or 'the Information Superhighway', or any other buzz word you can think of for the latest…
The Stacka stack is made up of various computing components which provide different functionality.
The Tragedy of the CommonsStory about how in order to protect the commons some people will have to give up some rights or care more for the commons.
TheaterThe geographical area outside the continental United States for which a commander of a unified or specified command has been assigned.
Theater AttackAttack on a geographical area outside the continental United States.
Theater Ballistic Missile Defense (TBMD) SystemThe aggregate TMD C3I and TBMD forces that, in total, provide defense against ballistic missile attacks within an overseas theater of operations.
Theater High Altitude Area Defense System (THAAD)A ground-based, air transportable interceptor system that will provide wide area defense capability by intercepting longer-range missiles at higher…
Theater Missile (TM)A theater missile (TM) is a ballistic missile (BM), cruise missile (CM), or air- tosurface guided missile (ASM) whose target is within a theater or which…
Theater Missile Defense (TMD)OBSOLETE. The strategies and tactics employed to defend a geographical area outside the continental United States against attack from short-range…
Theater Missile Defense Council (TMDC)A consultative body for considering TMD family of systems planning and programming issues; chaired by an Assistant to the MDA Deputy for Acquisition/TMD…
ThemeA user-defined perspective on a coverage, grid, tin or image geographic data set specified, if applicable, by a coverage name and feature class or data…
theme extractionA type of concept extraction that automatically recognizes significant vocabulary items in text documents to extract the theme or topic of a document.
ThermalA relatively small-scale, rising air current produced when the Earth's surface is heated.
Thermal EnergyThe energy developed through the use of heat energy.
Thermal ImageryImagery produced by sensing and recording the thermal energy emitted or reflected from the objects, which are imaged.
Thermal KillThe destruction of a target by heating it, using directed energy, to the degree that structural components fail.
Thermal ManagementTechnologies/techniques associated with the control and management of thermal energy, its generation, dissipation, and recovery.
thermal noiseThe noise generated by thermal agitation of electrons in a conductor. The noise power, P, in watts, is given by P = kTf, where k is Boltzmann's constant…
Thermal RadiationElectromagnetic radiation emitted (in two pulses from a nuclear air burst) from the fireball as a consequence of its very high temperature; it consists…
Thermal X-RaysThe electromagnetic radiation, mainly in the soft (low energy) x-ray region, emitted by the nuclear weapon residue by virtue of its extremely high…
thermodynamic temperatureA measure, in kelvins (K), proportional to the thermal energy of a given body at equilibrium.
ThermosphereThe atmospheric shell extending from the top of the mesosphere to outer space. It is a region of more or less steadily increasing temperature with height…
ThesaurusA thesaurus stores synonyms and related words. This allows a search engine to map city planning to land use, for example, and show the relevant pages even…
THFAbbreviation for tremendously high frequency. See electromagnetic spectrum.
Thiessen polygonsPolygons whose boundaries define the area that is closest to each point relative to all other points. Thiessen polygons are generated from a set of points.
Thin ClientA networked user computer that acts only as a terminal and stores no applications or user files. May have little or no hard drive space. See Client.
thin client (computing)A server-centric computing model in which the application software, data, and CPU power resides on a network server rather than on the client computer(s).
thin-client softwareComputer programs that reside on a server and react to external requests from a client.
thin-film laserA laser that is constructed by thin-film deposition techniques on a substrate for use as a light source, is usually used to drive thin-film optical…
thin-film optical modulatorA modulator that consists of multilayered films of material of different optical characteristics, is capable of modulating transmitted light by using…
thin-film optical multiplexerA multiplexer that consists of multilayered films of material of different optical characteristics, is capable of multiplexing transmitted light by using…
thin-film optical switchA switch that consists of multilayered films of material of different optical characteristics, that is capable of switching transmitted light by using…
thin-film optical waveguideA slab-dielectric waveguide that consists of multilayered films of material of different optical characteristics, is capable of guiding an optical signal…