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Measurement of isoplanatic angle and turbulence strength profile from H-alpha images of the Sun
1 : Indian Institute of Astrophysics
Koramangala, Bangalore-560034 -
India
2 : Department of Applied Optics and Photonics, University of Calcutta
87/1, College Street, Kolkata -
India
Adaptive Optics (AO) systems have become integral for ground-based astronomy. Based on the scientific case, there are various flavours of AO systems. Measuring the turbulence strength profile ($C_N^2(h)$) and other site characteristics is essential before selecting a site or implementing certain types of AO systems. We used an iterative deconvolution procedure on long-exposure H-$\alpha$ images of the Sun to determine the isoplanatic patch size during the daytime. Then, we determined the relationship between turbulence along different directions and also obtained an analytical estimate of the $C_N^2(h)$ profile.
