Scheme where multiple sites share a precise reference time or frequency
Time and frequency transfer is a scheme where multiple sites share a precise reference time or frequency.
The technique is commonly used for creating and distributing standard time scales such as International Atomic Time (TAI).
Time transfer solves problems such as astronomical observatories correlating observed flashes or other phenomena with each other, as well as cell phone towers coordinating handoffs as a phone moves from one cell to another.
Multiple techniques have been developed, often transferring reference clock synchronization from one point to another, often over long distances. Accuracy approaching one nanosecond worldwide is economically practical for many applications. Radio-based navigation systems are frequently used as time transfer systems.
In some cases, multiple measurements are made over a period of time, and exact time synchronization is determined retrospectively. In particular, time synchronization has been accomplished by using pairs of radio telescopes to listen to a pulsar, with the time transfer accomplished by comparing time offsets of the received pulsar signal.
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Timeandfrequencytransfer is a scheme where multiple sites share a precise reference time or frequency. The technique is commonly used for creating and...
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caesium. The clocks are compared using GPS signals and two-way satellite timeandfrequencytransfer. Due to the signal averaging TAI is an order of magnitude...
world through satellite navigation signals and other timeandfrequencytransfer techniques. Time-keeping and synchronization of clocks is a critical problem...
used for warping the frequency response of any discrete-time linear system (for example to approximate the non-linear frequency resolution of the human...
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"Understanding Low Frequency Non-radiative Power Transfer" (PDF). Fulton Innovation, Inc. Retrieved 3 January 2015. Schantz, Hans G. (2007). "A real-time location...
similar time-frequency domain as utilized by the traditional schemes of modulation such as TDMA, CDMA, and OFDM. It was first used for fixed wireless, and is...
time-invariant") system theory revealing their transfer functions in the frequency domain and their impulse responses in the time domain. Real-time implementations...
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at the Rabi frequency; when the incident light is detuned from this energy difference (detuned from resonance) then the population transfer occurs at the...
drops to half the value it has at low frequencies. The time constant is also used to characterize the frequency response of various signal processing...
quarter-cycle of the power frequency. Static transfer switches can be used where reliable and independent sources of power are available, and it is necessary to...
(XDS "Time-of-Day Packet") Standard frequencyandtime signal service Coordinated Universal Time List of UTC timing centers TimetransferTimeand frequency...
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optical transfer function (OTF) of an optical system such as a camera, microscope, human eye, or projector specifies how different spatial frequencies are...
clock Synchronization VBI, VITC WWVB Time synchronization in North America TimetransferTimeandfrequencytransferTime synchronization Parks Canada Agency...
transmitted, or received per unit time, and spectral flux or spectral power is the radiant flux per unit frequency or wavelength, depending on whether...
delay and phase delay are two related ways of describing how a signal's frequency components are delayed in time when passing through a linear time-invariant...
64 (number of bits transferred) / 8 (number of bits/byte). Thus, with a bus frequency of 100 MHz, DDR SDRAM gives a maximum transfer rate of 1600 MB/s...
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