Reconstruction of solar radioimages taken by the Siberian Solar Radiotelescope

摘要

The problem of reconstruction of images taken by the Siberian Solar Radiotelescope (SSRT) consists in the fact that the actual radiation pattern (RP) is uncertain. Therefore, in this work, we suggest a combined two-stage reconstruction. At the first stage, we determine the RP function in the iteration mode together with evolutionary filtering, which provides reconstruction in the passband of the installation taking intoaccount a priori information about the object under study. At the second stage, the spectrum is extrapolated on the basis of the method of projections onto convex sets [1], which provides an improved spatial resolution.