Technology Glossary


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  • Spreadsheet software
    computer programs (e.g. Excel, Lotus) that have efficient and accurate methods of working with numbers. They are used to perform...
  • SPS
    Sensor Processing Subsystem
  • Spurious Emission
    Any emission or part of it which appears outside of the authorized bandwidth (See Part 2 of the Code of...
  • SQL
    Structured Query Language
  • Squelch Control
    This control on a radio is used to silence the inherent background noise in a radio receiver so that only...
  • SRP
    Selected Reference Point
  • SSFDR
    Solid-State Flight Data Recorder
  • SSM
    Sign Status Matrix
  • SSR
    Solid State Recorder
  • STAB
    Stabilizer
  • stable operation
    A condition where no appreciable fluctuation, intentional or unintentional, is occurring to any of the engine's variables , such as...
  • standard deviation SD
    The square root of the variance. The value is expressed in the units of measure in which the observations were...
  • STAR
    StandardTerminal Arrival Route
  • State Local Plan
    a document that details monitoring assignments, actions to be taken in emergency activations, and other guidance for broadcasters and cable...
  • State Primary SP
    a primary source of EAS state programming which can originate with a Governor or designated representative, such as a state's...
  • State Relay Network
    a system of facilities used to distribute State EAS activations and programming across a state. The State Relay Network in...
  • State Relay SR
    an entity which receives and retransmits EAS activations in a State Relay Network to assist in bringing a state activation...
  • static thrust
    Thrust developed by engine, without any initial air-mass momentum due to engine's static state.
  • stationary mode
    A time where engine parameters do not change ( for example: cruising flight)
  • Statute Mile
    A distance of 5,280 feet.
  • Steering committee
    a group of persons who meet periodically to evaluate the progress and success of the implementation of the technology...
  • STEPCLB
    StepClimb
  • steradian
    A unit of measure of solid angles. Formally, it is the angle subtended at the center of the sphere by...
  • STOL
    Short Takeoff and Landing
  • STP
    Shielded Twisted Pair
  • Streaming Video
    is a sequence of "moving images" that are sent in compressed form over the Internet and displayed by the viewer...
  • STTR
    Small Business Technology Transfer Resources
  • Style Sheets
    Templates for web page design that can be built into the programming of a site to provide continuity in appearance...
  • SUA
    Special Use Airspace
  • Subcarrier
    an inaudible portion of the broadcast signal that is added to the program signal of the FM or TV sound...
  • Subcarrier
    An inaudible portion of the broadcast signal that is added to the program signal of FM or TV sound and...
  • SUBSCRIBER LINE CHARGE SLC
    A monthly fee paid by telephone subscribers that is used to compensate the local telephone company for part of the...
  • SUBSCRIBER LINE CHARGE SLC
    A monthly fee paid by telephone subscribers that is used to compensate the local telephone company for part of the...
  • Subscriber Line Charge SLC
    A monthly fee paid by telephone subscribers that is used to compensate the local telephone company for part of the...
  • Subscriber Loop
    The part of the telephone network that runs from the central office to individual subscribers.
  • Subscription Television STV
    A special service providing additional pro-grams in encoded form to television viewers who pay a monthly rate. Devices that attach...
  • Subsidiary Communications Services
    a subcarrier of television and FM stations providing a second audio programming source.
  • subsonic speed
    A speed less than the speed of sound. 100 - 350 MPH. Some smaller planes use this speed, like the...
  • Suite
    a collection of software programs that are sold together and are supposed to work together efficiently and use similar...
  • sun angle
    The angle of the Sun above the horizon. Both the quantity (lumens) and the spectral quality of light being reflected...
  • sun synchronous
    An Earth satellite orbit in which the orbital plane remains at a fixed angle with respect to the Sun, precessing...
  • Sunshine Notice Period
    A Public Notice is released seven calendar days before an Open or Closed Commission Meeting, announcing the day and time...
  • Supers
    Text messages that flash across the screen to support key voice-over points.
  • supersonic
    A speed which is moving faster than the speed of sound. 760- 3500 MPH Often known as mach 1 to...
  • Superstation
    A television broadcast station, other than a network station, licensed by the FCC that is secondarily transmitted by a satellite...
  • Surfing
    To "surf" is to move from site to site on the Internet in a random or questing way while searching...
  • Surfing
    exploring locations and scanning the contents of WWW sites on the Internet.
  • Surfing
    A slang term used to describe switching a television from channel to channel in a continuous order with a remote...
  • SWAP
    Severe Weather Avoidance Program
  • swath
    A strip, belt, or long narrow extent of anything. Specifically refers to the ground track, or trace, followed by Landsat...
  • SWIR
    Short Wave Infrared
  • Switch
    A device that direct electricity, or light, along different physical paths.
  • Switch
    Switches act as the center of a "star" topology, much like hubs. They have between 4 and 20+ ports. Internally,...
  • SWITCH
    A device that routes a call by selecting the paths or circuits to be used for transmission of information and...
  • Switched Network
    A type of system in which each user has a unique address (such as a phone number) that allows the...
  • SWITCHING
    Process of routing communications traffic from a sender to the correct receiver.
  • Synchronous
    A type of two-way communication that occurs with virtually no time delay, allowing participants to respond in real time. Also,...
  • Syndicated Exclusivity SYNDEX Rule
    This rule requires cable systems carrying distant signals to black out syndicated programming (usually on superstations) for which a local...
  • synoptic view
    The ability to see large areas at one time, such as an entire metropolitan area.
  • System
    a group of elements, components, or devices that are assembled to serve a common purpose. In a technological system, this...
  • System architecture
    a description of the design and contents of a computer system. If documented, it may include information such as a...
  • System functions
    a list of the specific capabilities a system should be able to do or staff should be able to do...
  • T
    Track, also means channel
  • T Carrier
    Normally refers to a T-1 transmission system, but can be any of standard North American Digital Hierarchy transmission rates.
  • T C TOC
    Top-of-Climb
  • T D TOD
    Top of-Descent
  • T O TO
    Takeoff
  • TACAN
    Tactical Air Navigation
  • TACH
    Tachometer
  • TAI
    Thermal Anti-lce
  • TAP
    Terminal Area Productivity
  • TARIFF
    The documents filed by a carrier describing their services and the payments to be charged for such services.
  • TARIFF
    The documents filed by a carrier describing their services and the payments to be charged for such services.
  • Tariff
    A statement by a communications company that sets forth the services offered by that company, and the rates, terms and...
  • TAS
    True Airspeed
  • TAT
    Total AirTemperature
  • TATCA
    Terminal Air Traffic Control Automaiton
  • TBD
    To Be Determined
  • TBO
    Time between Overhauls
  • TBS
    To Be Specified
  • TCA
    Terminal Control Area
  • TCAS
    Traffic Alert & Collision Avoidance System
  • TCP IP
    Refers to communication protocols used to connect hosts on the Internet. TCP stands for Transmission Control Protocol, which is the...
  • TDM
    Time Division Multiplexing
  • TDRSS
    Tracking Data and Relay Satellite System
  • TDWR
    Terminal Doppler Weather Radar (TDWR located and classifies windshear conditions and provides advisories in the terminal area. These data are...
  • Technical requirements
    simple statements of parameters for a technology solution addressing topics such as the number of people who will use the...
  • Technical support staff
    the persons who support and maintain the technology solution once it is implemented.
  • Technology resources
    the hardware, software, networks and networking capability, staff, dollars and context which together can be used in the implementation of...
  • Telecommunication
    The process of transmitting or receiving information over a distance by any electrical or electromagnetic medium. Information may take the...
  • Telecommunications
    Any transmission, emission or reception of signs, signals, writing, images, sounds or intelligence of any nature by wire, radio, optical...
  • Telecommunications
    The transmission, between or among points specified by the user, of information of the user's choosing, without change in the...
  • TELECOMMUNICATIONS RELAY SERVICE TRS
    A free service that enables persons with TTYs, individuals who use sign language and people who have speech disabilities to...
  • Teleconference
    Simultaneous conference to multiple sites distributed via audio (phone or other audio). Satellite videoconferences and videoconferences using compressed video are...
  • Teleconferencing
    The use of audio, video, or computer equipment brought together through a communications system to permit geographically separated individuals to...
  • Telemedicine
    Use of telecommunications technology for medical diagnosis and patient care when the provider and client are separated by distance. Telemedicine...
  • Telemetering Cable
    Cable used for transmission of information from instruments to the peripheral recording equipment.
  • telemetry
    The science of measuring a quantity or quantities, transmitting the measured value to a distant station, and there interpreting, indicating,...
  • Telemetry
    Transmission of radio signals and coded data from a space vehicle.
  • TELEPHONE RELAY SERVICE TRS
    A free service that enables persons with TTYs, individuals who use sign language and people who have speech disabilities to...

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