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On-orbit calibration based upon star observation to correct thermal deformation of geostationary optical satellites.

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Title: On-orbit calibration based upon star observation to correct thermal deformation of geostationary optical satellites.
Authors: Huang, Jie1,2 (AUTHOR) huangjie2018@sjtu.edu.cn, Xi, Juntong1 (AUTHOR), Wu, Yayun2 (AUTHOR)
Source: Instrumentation Science & Technology. 2024, Vol. 52 Issue 6, p622-636. 15p.
Subjects: Geostationary satellites, Geosynchronous orbits, Star observations, Orbits (Astronomy), Optical images
Abstract: The thermal environment in a geostationary orbit is more complicated than a low orbit. Thermal deformation is a primary factor to deteriorate geometric quality of remote imaging of geostationary optical satellites. The on-orbit geometric quality testing of the SDLT-1 satellite of China shows that the light of sight (LOS) deformation in longitude and latitude are 26 pixels and 14 pixels, respectively, which do not meet the accuracy requirements. Therefore, a novel on-orbit geometric calibration method based on star observation is proposed to improve the geometric deformation. The imager embodied stars are employed as sources to evaluate the developed method and compared with the traditional procedure based upon landmarks. The results show that the geometric accuracy of the new approach is 3.2 pixels which is improved compared to traditional calibration method. [ABSTRACT FROM AUTHOR]
Copyright of Instrumentation Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Label: Title
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  Data: On-orbit calibration based upon star observation to correct thermal deformation of geostationary optical satellites.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Huang%2C+Jie%22">Huang, Jie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> huangjie2018@sjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xi%2C+Juntong%22">Xi, Juntong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Yayun%22">Wu, Yayun</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Instrumentation+Science+%26+Technology%22">Instrumentation Science & Technology</searchLink>. 2024, Vol. 52 Issue 6, p622-636. 15p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Geostationary+satellites%22">Geostationary satellites</searchLink><br /><searchLink fieldCode="DE" term="%22Geosynchronous+orbits%22">Geosynchronous orbits</searchLink><br /><searchLink fieldCode="DE" term="%22Star+observations%22">Star observations</searchLink><br /><searchLink fieldCode="DE" term="%22Orbits+%28Astronomy%29%22">Orbits (Astronomy)</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+images%22">Optical images</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The thermal environment in a geostationary orbit is more complicated than a low orbit. Thermal deformation is a primary factor to deteriorate geometric quality of remote imaging of geostationary optical satellites. The on-orbit geometric quality testing of the SDLT-1 satellite of China shows that the light of sight (LOS) deformation in longitude and latitude are 26 pixels and 14 pixels, respectively, which do not meet the accuracy requirements. Therefore, a novel on-orbit geometric calibration method based on star observation is proposed to improve the geometric deformation. The imager embodied stars are employed as sources to evaluate the developed method and compared with the traditional procedure based upon landmarks. The results show that the geometric accuracy of the new approach is 3.2 pixels which is improved compared to traditional calibration method. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Instrumentation Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/10739149.2024.2303596
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 622
    Subjects:
      – SubjectFull: Geostationary satellites
        Type: general
      – SubjectFull: Geosynchronous orbits
        Type: general
      – SubjectFull: Star observations
        Type: general
      – SubjectFull: Orbits (Astronomy)
        Type: general
      – SubjectFull: Optical images
        Type: general
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      – TitleFull: On-orbit calibration based upon star observation to correct thermal deformation of geostationary optical satellites.
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            NameFull: Huang, Jie
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            NameFull: Xi, Juntong
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            – D: 01
              M: 11
              Text: 2024
              Type: published
              Y: 2024
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