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Abstract <p>Compact instruments on nanosatellites provide a valuable alternative to large heliophysical observatories, enabling rapid replacement of nonfunctional facilities and low-cost testing of new technologies. At the same time, development of imaging instruments for nanosatellite platforms involves specific technical challenges. This paper discusses the general operating principles of extreme ultraviolet (EUV) solar telescopes, the main challenges associated with their miniaturization, and potential design solutions, demonstrating the feasibility of their practical implementation by the example of a small-sized coronagraph telescope and a high-resolution telescope. One of the instruments described—the SOL EUV coronagraph—became the first imaging instrument for solar observations deployed on a nanosatellite. The paper provides a detailed description of its design and presents the results of in-orbit testing on the <i>NORBY-2</i> nanosatellite, as well as discusses the prospects for its further application and the scientific significance of the data it can provide.</p>

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Small-Sized EUV Telescopes for Solar Observations

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • I. P. Loboda,
  • S. V. Kuzin,
  • A. A. Pertsov,
  • V. I. Chervinsky,
  • A. A. Kholodilov,
  • S. A. Bogachev,
  • A. A. Reva,
  • A. S. Kirichenko

摘要

Abstract

Compact instruments on nanosatellites provide a valuable alternative to large heliophysical observatories, enabling rapid replacement of nonfunctional facilities and low-cost testing of new technologies. At the same time, development of imaging instruments for nanosatellite platforms involves specific technical challenges. This paper discusses the general operating principles of extreme ultraviolet (EUV) solar telescopes, the main challenges associated with their miniaturization, and potential design solutions, demonstrating the feasibility of their practical implementation by the example of a small-sized coronagraph telescope and a high-resolution telescope. One of the instruments described—the SOL EUV coronagraph—became the first imaging instrument for solar observations deployed on a nanosatellite. The paper provides a detailed description of its design and presents the results of in-orbit testing on the NORBY-2 nanosatellite, as well as discusses the prospects for its further application and the scientific significance of the data it can provide.