On-orbit Calibration of a Telescope Alignment for Earth Observation using Stars and QUEST

Shinya Fujita, Yuji Sato, Toshinori Kuwahara, Yuji Sakamoto, Junichi Kurihara

研究成果: Conference contribution

抄録

The Space Robotics Laboratory at Tohoku University and the Space Mission Center at Hokkaido University have been working on the development of 50 kg-class Earth observation satellites series for more than 10 years. As one of the Earth observation instruments, we had developed a Cassegrain telescope named High-Precision Telescope (HPT). In exchange for a high ground resolution of 2.2 m, HPT has a narrow field of view (0.52 × 0.39°) and the alignment error of the telescope with respect to the satellite body has a significant influence on the pointing error during Earth observation. However, in order to reduce the cost and time required to assemble the satellite, the alignment inspection and adjustment before the launch should be eliminated. In this study, we propose a method to estimate the camera alignment in three axes by using Sirius A, a first-magnitude star in the Canis Major, as a reference star for calibration. The QUEST method is applied to analyze the captured Sirius A image and ephemeris. As a result of the validation of the camera alignment matrix through Jupiter observations, the estimation error was less than 10% of the field of view, and its validity was confirmed. Compared to the conventional method using the moon images, the proposed method is superior in terms of usability and generality.

本文言語English
ホスト出版物のタイトル2022 IEEE/SICE International Symposium on System Integration, SII 2022
出版社Institute of Electrical and Electronics Engineers Inc.
ページ120-125
ページ数6
ISBN(電子版)9781665445405
DOI
出版ステータスPublished - 2022
イベント2022 IEEE/SICE International Symposium on System Integration, SII 2022 - Virtual, Narvik, Norway
継続期間: 2022 1月 92022 1月 12

出版物シリーズ

名前2022 IEEE/SICE International Symposium on System Integration, SII 2022

Conference

Conference2022 IEEE/SICE International Symposium on System Integration, SII 2022
国/地域Norway
CityVirtual, Narvik
Period22/1/922/1/12

ASJC Scopus subject areas

  • 人工知能
  • ハードウェアとアーキテクチャ
  • 生体医工学
  • 制御およびシステム工学
  • 機械工学
  • 制御と最適化

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