Abstract
An optical information processing technique, commonly used for speckle-pattern analysis, is applied to the study of the motion of shadow patterns associated with stellar scintillation. The intensities of the diffraction patterns produced by several double-exposure photographs are added on a single plate. Interference fringes are observed at right angle to the direction of displacement. Fringe spacing is inversely proportional to the speed of motion. By fitting the velocity deduced from fringe measurments with the results of meteorological wind soundings, an approximate altitude is obtained for the atmospheric turbulent layers producing stellar scintillation.
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