Speckle Interferometric Techniques Applied To The Observation Of The Solar Photosphere

C. Aime; G. Ricort

doi:10.1117/12.959286

3 December 1980 Speckle Interferometric Techniques Applied To The Observation Of The Solar Photosphere

C. Aime, G. Ricort

Proceedings Volume 0243, Applications of Speckle Phenomena; (1980) https://doi.org/10.1117/12.959286
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

Speckle interferometric techniques are used to study the solar granulation. Calibration of the effects of atmospheric turbulence is performed by using either the difference in behaviour between redundant and non redundant apertures in presence of atmospheric turbulence, or by analysing moon-limb blurring during a solar eclipse, or by using the changes in seeing conditions during speckle-interferometric measurements. These techniques require a theoreti-cal knowledge of the effects of atmospheric turbulence on the modulation transfer function (M.T.F.) of the image as it is impratical to use an unresolved star near the sun as a reference source during day time observations. The agreement between the experimental M.T.F. obtained with an unresolved star and the theoretical form deduced from Korff's log-normal assumptions is extended to day time conditions.

Citation Download Citation

C. Aime and G. Ricort "Speckle Interferometric Techniques Applied To The Observation Of The Solar Photosphere", Proc. SPIE 0243, Applications of Speckle Phenomena, (3 December 1980); https://doi.org/10.1117/12.959286

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