aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 55 10.34898/aat.vol3.iss3.pp8-11 Instruments and Methods Experiments on high-spatial-resolution observations of the Sun at the A.B. Severny Solar Tower Telescope of the Crimean Astrophysical Observatory Kutsenko Aleksandr Yang Shangbin Abramenko Valentina Semyonov Dmitry Crimean Astrophysical Observatory, Nauchny, 298409 Key Laboratory of Solar Activity, National Astronomical Observatories of China, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China Crimean Astrophysical Observatory, Nauchny, 298409 Crimean Astrophysical Observatory, Nauchny, 298409 22 12 2022 3 3 8 11 02 12 2022 Copyright (c) 2022 Kutsenko A., Yang S., Abramenko V., Semyonov D. 2022 Kutsenko A., Yang S., Abramenko V., Semyonov D. The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

In this paper, we describe high-cadence and high-spatial-resolution observations of the Sun acquired by the A.B. Severny Solar Tower Telescope (STT-1) in October and November, 2021. The spatial resolution of ground-based optical telescopes is usually limited by seeing. However, the spatial resolution can be improved significantly by a postprocessing of hundreds of short-exposure images of the object. In order to get the data required for the post-processing, the telescope was equipped with a camera and a high-speed detector. The detector was able to take up to tens of frames per second, which is necessary for speckle-reconstruction of the solar surface images. A thorough visual analysis of the reconstructed images as well as their comparison with the data provided by SDO/HMI yielded very promising results. Individual granules as well as penumbral fibrils are clearly seen in the images. High-spatial-resolution observations by STT-1 provide new opportunities for the studies of the Sun.

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