Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...276..663i&link_type=abstract
Astronomy and Astrophysics, Vol. 276, p. 663 (1993)
Astronomy and Astrophysics
Astrophysics
5
Atmospheric Effects - Methods: Observational Techniques: Image Processing - Sun: General - Sun: Photosphere
Scientific paper
A method is presented allowing one to estimate, in the case of daytime observations, the angle-of-arrival isoplanatic patch size from the measurement of the differential image motion of the solar limb. The experimental results have been obtained using the solar astrolabe of Calern Observatory (CERGA-France). Performing a modelization as proposed by Fried (1977) leads to an explanation of these results by an equivalent atmosphere formed with two impulse turbulent layers corresponding to two different scales for the size of the isoplanatic patch. Finally, the isoplanatism is quantified for speckle interferometry and adaptive optics experiments.
Borgnino Julien
Irbah Abdanour
Laclare Francis
Merlin Guy
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