Speckle interferometric techniques applied to the observation of the solar photosphere

Details Speckle interferometric techniques applied to the observation of the solar photosphere Speckle interferometric techniques applied to the observation of the solar photosphere

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980spie..243...58a&link_type=abstract

In: Applications of speckle phenomena; Proceedings of the Seminar, San Diego, CA, July 29, 30, 1980. (A81-39439 18-35) Bellingha

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Applications

2

Interferometry, Solar Atmosphere, Solar Granulation, Space Observations (From Earth), Speckle Patterns, Turbulence Effects, Atmospheric Turbulence, Blurring, Calibrating, Modulation Transfer Function, Power Spectra, Solar Eclipses, Telescopes

Scientific paper

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 behavior 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 theoretical knowledge of the effects of atmospheric turbulence on the modulation transfer function (M.T.F.) of the image as it is impractical 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.

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