Technology Glossary


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

  • PHIBUF
    Performance Buffet Limit
  • PHINOM
    Nominal Bank Angle
  • PHY
    Physical Layer Device. The name used for a transceiver in Fast Ethernet and Gigabit Ethernet systems.
  • Physical Address
    The 48-bit MAC address assigned to a station interface, identifying that station on the network.
  • Physical security
    measures that must be taken to prevent theft, vandalism, and other types of harm to the technology equipment.
  • picture element pixel
    A unit whose first member is a resolution cell and whose second member is the grey shade assigned to that...
  • PIREPS
    Pilot Reports
  • pitch
    The rotation of a spacecraft about the horizontal axis normal to its longitudinal axis (in the along-track direction) so as...
  • pixel
    Abbreviation of picture element.
  • Pixel
    The smallest area of a television picture capable of being sampled, transmitted through a system and displayed on a...
  • Pixels
    in computers, pixels per inch (ppi) is a measure of the sharpness (that is, the density of illuminated points) on...
  • planetary albedo
    A unitless measure of the ratio of outgoing to incoming solar radiation created by converting a radiometrically calibrated image observed...
  • Platform
    the computer hardware and operating system software that runs application software.
  • Plenum
    The air return path of a central air handling system, either ductwork or open space over a dropped ceiling.
  • Plenum Cable
    Cable approved by Underwriters Laboratories for installation in plenums without the need for conduit because the insulation and jacket compounds...
  • Plug Ins
    Plug-Ins are software pieces that add a specific feature or service to a larger system. For example, in order to...
  • PMS
    Performance Management System
  • PN Participating
    formerly a Primary station. A PN is a participating station; i.e., any broadcast station (and cable TV firm) that broadcasts...
  • PND
    Primary Navigation Display
  • PNF
    Pilot Not Flying
  • point spread function
    The inferring of spatial characteristics of the instrument from the collected image of a point source such as a star....
  • Point to Point Transmission
    Carrying a communication signal between two locations without branching to other locations.
  • polar orbit
    A satellite orbit that passes over, or very close to, both poles of the Earth. Landsat 4, 5, and 7...
  • Pole Attachment
    A communications relay or receiving de-vice attached to a pole, duct or conduit owned or controlled by a utility...
  • Polyethylene
    A thermoplastic material having the chemical identity of polymerized ethylene.
  • Polyvinyl Chloride PVC
    A thermoplastic material composed of polymers of vinyl chloride which may be rigid or flexible depending on specific formulation.
  • POOMA
    Parallel Object Oriented Methods and Applications: Los Alamos' approach to doing parallel scientific computing by using high-level object descriptions of...
  • POOMA
    Parallel Object Oriented Methods and Applications: Los Alamos' approach to doing parallel scientific computing by using high-level object descriptions of...
  • Pop Up Ads
    Advertisements that appear in a separate browser window while a web site is being viewed.
  • Port
    A connection point on a hub, router, bridge, switch, etc.
  • Portable Document Format PDF
    A file format developed by Adobe Systems
  • Portal
    (Also, web portal.) "Portal" refers to a web site or service that offers a broad array of resources and services,...
  • POS
    Position
  • POS INIT
    Position Initialization
  • POS REF
    Position Reference
  • POTS
    Plain Old Telephone Service, basic voice phone service.
  • power
    The rate of doing work ;work per unit of time.
  • PPI
    Plan Position Indicator
  • PPOS
    Present Position
  • Premium Channels
    Channels not included in a cable provider
  • PRESCRIBED INTEREXCHANGE CHARGE PICC
    The charge the local exchange company assesses the long distance company when a consumer picks it as his or her...
  • PRESCRIBED INTEREXCHANGE CHARGE PICC
    The charge the local exchange company assesses the long distance company when a consumer picks it as his or her...
  • Preselected code
    an EAS event which the operator of EAS equipment has chosen to be automatically encoded and retransmitted upon reception.
  • pressure of gas
    pressure equals force divided by unit area.
  • Presubscription
    This term is used to describe the selection of a particular long distance carrier to handle all calls for "1+dialing"...
  • PREV
    Previous
  • Primary
    (obsolete) See PN.
  • primary color
    One of the three colors, either additive (blue, green, and red) or subtractive (cyan, yellow, and magenta) that may be...
  • Primary Entry Point PEP
    They are the key broadcast stations throughout the United States which together can provide national emergency information in the event...
  • Primary Interexchange Carrier PIC
    The PIC is the main long distance carrier used for "1+dialing" through which all interstate long distance toll calls are...
  • Printer
    a device that translates signals from a computer into words and images onto paper in black and white or color....
  • Private Home Viewing
    The viewing of television in a private home with reception by satellite equipment that is operated by an individual in...
  • Private Line Service
    Dedicated telecommunications channels provided between two points or switched among multiple points. Privately leased for high-volume voice, data, audio or...
  • Private Radio Service
    Radio communications authorized for local governments and private enterprises. Amateur and citizen band radio are private radio services as are...
  • PROC
    Procedure
  • PROF
    Profile
  • PROG
    Progress Page on MCDU
  • Program Log
    Records once kept by a broadcasting station in a public file which provided a record of programs broadcast, program type...
  • Program Priorities
    the precedence of the information that must be transmitted during an EAS activation, namely national, local, and state activations in...
  • Project management software
    software programs that provide tools to help manage projects, such as integrated calendars, report generators, scheduling, charting, tracking, prioritizing,...
  • Project team
    the group of persons responsible for carrying out the successful implementation of the technology solution.
  • propulsion
    The energy used to propel or drive forward an airplane.
  • Protocol
    A set of agreed upon rules and message formats for exchanging information among devices on a network.
  • Protocol
    a standard set of guidelines by which digital information is encoded and decoded, including the common code structure, the character...
  • Protocols
    the set of standards and rules that let networked computers communicate or share information, such as Ethernet or token...
  • PROV
    Provisional
  • PS
    Pacific Southwest Airways
  • PT
    Total Pressure
  • PTH
    Path
  • Public Notice PN
    A Public Notice is issued by the Commission to notify the public of an action taken or an upcoming...
  • Pulling Eye
    A device fastened to a cable to which a hook may be attached in order to pull the cable through...
  • PURE RESELLER
    Telecommunications provider that simply resells the services of another service provider
  • PVC Construction Term
    Polyvinyl chloride.
  • PVC Network Term
    Permanent Virtual Circuit
  • PVD
    Plan View Display
  • QAR
    Quick Access Recorder
  • QRH
    The barometric pressure as reported by a particular station
  • QTY
    Quantity
  • QUAD
    Quadrant
  • quantization level
    The number of numerical values used to represent a continuous quantity.
  • quantize
    (1) To restrict a variable to discrete values, each of which is normally an integral multiple of the same quantity....
  • Quorum
    At the FCC, the minimum number of Com-missioners required to be present at a meeting or to participate in voting...
  • R
    Right
  • R
    Route Tuned NAVAID
  • R C
    Rate of Climb
  • RAD
    Radial
  • RAD
    Radio
  • radar
    Short for "radio detection and ranging," radar sends out short pulses of microwave energy and records the returned signal's strength...
  • Radar
    A radio determination system based on the comparison of reference signals with radio signals reflected, or retransmitted, from the position...
  • radian
    A unit of angle subtended by an arc of a circle equal in length to the radius of the...
  • radiance
    Measure of the energy radiated by an object. In general, radiance is a function of viewing angle and spectral wavelength...
  • radiance based calibration
    The empirical calibration of satellite sensors by measurement of upwelling radiation from targets that are viewed on the ground or...
  • radiation
    The process by which electromagnetic energy is propagated through free space by virtue of joint undulatory variations in the electric...
  • Radiation
    The outward flow of energy from any source in the form of radio waves.
  • Radio Broadcast Data System RBDS
    a defined protocol for data that is transmitted on the 57Hz subcarrier of FM radio broadcast stations utilized mainly by...
  • Radio Common Carrier
    Part of the domestic land mobile radio service. Signals are received and transmitted from mobile transmitters.
  • Radio Determination
    The determination of the position, velocity and/or other characteristics of an object, or the obtaining of information relating to these...
  • Radio Frequency RF
    Radio frequency refers to a signal generated by a radio transmitter and sent out through an antenna. The frequency of...
  • radiometer
    An instrument for detecting and measuring electromagnetic radiant energy.
  • radiometric emissive band calibration brightness temperature
    Equations converting unitless digital numbers (DN) from the satellite imager to brightness temperature, a measure of the amount of energy...

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Page 15 of 21

Suggestions?
The Timbercon Technology Glossary continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.


Home : Fiber Optic Education » Technology Glossary