Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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Stellar Source Selections for Image Validation of Earth Observation Satellite

  • Yu, Ji-Woong (Astrodynamics and Control Laboratory, Department of Astronomy, Yonsei University) ;
  • Park, Sang-Young (Astrodynamics and Control Laboratory, Department of Astronomy, Yonsei University) ;
  • Lim, Dong-Wook (Astrodynamics and Control Laboratory, Department of Astronomy, Yonsei University) ;
  • Lee, Dong-Han (Korea Aerospace Research Institute) ;
  • Sohn, Young-Jong (Astrodynamics and Control Laboratory, Department of Astronomy, Yonsei University)
  • Received : 2011.10.06
  • Accepted : 2011.11.18
  • Published : 2011.12.15
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Abstract

A method of stellar source selection for validating the quality of image is investigated for a low Earth orbit optical remote sensing satellite. Image performance of the optical payload needs to be validated after its launch into orbit. The stellar sources are ideal source points that can be used to validate the quality of optical images. For the image validation, stellar sources should be the brightest as possible in the charge-coupled device dynamic range. The time delayed and integration technique, which is used to observe the ground, is also performed to observe the selected stars. The relations between the incident radiance at aperture and V magnitude of a star are established using Gunn & Stryker's star catalogue of spectrum. Applying this result, an appropriate image performance index is determined, and suitable stars and areas of the sky scene are selected for the optical payload on a remote sensing satellite to observe. The result of this research can be utilized to validate the quality of optical payload of a satellite in orbit.

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