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Estimation of the spatial coherence outer scale relevant to long baseline interferometry and imaging in optical astronomy

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Abstract

A technique is proposed allowing estimation of the spatial coherence outer scale, from simultaneous measurements of Fried’s parameter r0 and of the variance of angle-of-arrival fluctuations. This optical parameter must be differentiated from the classical geophysical parameter called the outer scale of turbulence; its knowledge is important for long baseline interferometry and imaging in optical astronomy.

© 1990 Optical Society of America

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