As on September 20, 2014

Although space-borne observations of the Sun are, in general, commonly thought to be superior in quality compared to ground-based data, this is not fully the case with the solar corona. Not only can observations of the solar corona during total eclipses of the Sun provide data unavailable from any current satellites (SOHO, STEREO, TRACE and/or Hinode, as well as the Solar Dynamics Observatory, SDO), but some of them are unique for their kind (e.g., observing, with high resolution, the white-light corona within one solar radius above the solar limb, a region mostly inaccessible from SOHO or STEREO).Thus solar eclipse observations from ground proove to be very useful.

                

A major challenge for ground based Solar eclipse imaging is that the features and prominences in the corona lie hidden in the steep intensity gradient of the corona.Several algorithms and methods (Espenak, 2000; Druckmüller et al., 2006)have been developed to reconstruct the coronal features from the individual images.Radial unsharpmasking is a simple and elegent technique that is commonly used with the solar eclipse imaging.The methods of using Adobe Photoshop radial blur function for this purpose is well documented in the literature.We have been able to develop a code which uses radial unsharpmasking and threshold filtering to bring out the prominent features of solar corona.The results from the developed code on solar eclipse images of july 22 2009 is presented in this report.

                

Coronal Structures: