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charge-coupled device

Overview page. Subjects: Astronomy and Astrophysics — Computing.

(CCD)

A light-sensitive semiconductor used to enhance images obtained from faint objects. It accumulates and temporarily stores charge at particular pixel locations when struck by...

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Coordinated Universal Time

Overview page. Subjects: Astronomy and Astrophysics — Computing.

An international standard which defines the time throughout the world. Signals which send coordinated universal time values are broadcast regularly from land transmitters and satellites...

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front-end processor

Overview page. Subjects: Computing — Astronomy and Astrophysics.

An I/O processor that is used to format and/or process input data. The term is sometimes used to refer to a communication processor. Compare back-end processor.

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International Atomic Time

Overview page. Subjects: Astronomy and Astrophysics — Computing.

The most accurate time that is available to computers in a distributed system. Clocks which adhere to this standard are accurate to one part in 10,000,000,000,000. Such clocks are often...

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pincushion distortion

Overview page. Subjects: Astronomy and Astrophysics — Computing.

An optical defect in which the magnification of a lens decreases with distance from the optical axis, giving the image of a square object with concave sides, like a pincushion.

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redundancy

Overview page. Subjects: Computing — Astronomy and Astrophysics.

The provision of additional components in a system, over and above the minimum set of components needed to perform the functions of the system, for purposes of reliability or robustness....

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