Definition: Fast Fourier Transformation (FFT): A Fourier Transform is the mathematical operation that takes measurements made with a radio interferometer and transforms them into an image of the radio sky.
Fast Fourier Transform
Fiber Optics
(a) The use of fine transparent fibers to transmit light. The light passes along the fibers by a series of internal reflections.
He did pioneering work on what is now called the Fast Fourier transform (1940), but the significance of his discovery was not appreciated at the time and today the FFT is credited to Cooley and Tukey (1965).
It is especially good at computing the fast fourier transform very efficiently, and has increasing applications in radio astronomy, especially in correlators and digital filterbanks/spectrometers.
Fast Fourier Transformation (FFT) - Space and Astronomy Definition - Online...
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 See also: Field, Sky, Solar, Telescope, Planet
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