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Time and Frequency

См. также в других словарях:

  • Time and frequency transfer — describes mechanisms for comparing measurements of time and frequency from one location to another. The technique is commonly used for creating and distributing standard time scales such as International Atomic Time (TAI).Examples of time and… …   Wikipedia

  • Time and Frequency Standards Laboratory — The Time and Frequency Standards Laboratory is a part of the National Physical Laboratory in New Delhi which maintains and calibrates the Indian Standard Time.Features of the Time and Frequency Standards Lab include: * Four caesium and rubidium… …   Wikipedia

  • time and frequency standard — A reference value of time and time interval. Standards of time and frequency are determined by astronomical observations and by the operation of atomic clocks and other advanced timekeeping instruments. They are disseminated by transport of… …   Military dictionary

  • Standard time and frequency signal service — The Standard Time and Frequency Signal (STFS) is a service available in the United States (centered at 10.000MHz? .jg) which provides standard time and frequency signals, broadcast on very precise carrier frequencies by the U.S. Naval Observatory …   Wikipedia

  • Two-Way Satellite Time and Frequency Transfer — (TWSTFT) is a high precision long distance time and frequency transfer mechanism used between time bureaux to determine and distribute time and frequency standards. As of 2003 TWSTFT is being evaluated as an alternative to be used by the Bureau… …   Wikipedia

  • Time-frequency analysis — is a body of techniques for characterizing and manipulating signals whose component frequencies vary in time, such as transient signals.Whereas the technique of the Fourier transform can be used to obtain the frequency spectrum of a signal whose… …   Wikipedia

  • Time from NPL — Map showing the location of the Anthorn VLF transmitter within Cumbria …   Wikipedia

  • Time transfer — describes methods for transferring reference clock synchronization from one point to another, often over long distances. Radio based navigation systems are frequently used as time transfer systems.In some cases, multiple measurements are made… …   Wikipedia

  • Frequency domain — In electronics, control systems engineering, and statistics, frequency domain is a term used to describe the domain for analysis of mathematical functions or signals with respect to frequency, rather than time.[1] Speaking non technically, a time …   Wikipedia

  • Time in physics — In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a geometrical dimension, such as length, and perform mathematical operations on it. It is a scalar quantity… …   Wikipedia

  • Time-frequency representation — A time frequency representation (TFR) is a view of a signal (taken to be a function of time) represented over both time and frequency. Time frequency analysis means analysis of a TFR. TFRs are often complex valued fields over time and frequency,… …   Wikipedia

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