Computer Science – Sound
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975nropt...6...15m&link_type=abstract
Nouvelle Revue d'Optique, vol. 6, Jan.-Feb. 1975, p. 15-23. In French.
Computer Science
Sound
4
Atmospheric Turbulence, Diffraction Patterns, Optical Data Processing, Photographic Recording, Speckle Patterns, Stellar Luminosity, Atmospheric Stratification, Imaging Techniques, Luminous Intensity, Scintillation, Stellar Motions, Wind Measurement
Scientific paper
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 angles to the direction of displacement. Fringe spacing is inversely proportional to the speed of motion. By fitting the velocity deduced from fringe measurements to the results of meteorological wind soundings, an approximate altitude is obtained for the atmospheric turbulence layers producing stellar scintillation.
Borgnino Julien
Martin Francisco
Roddier Francois
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