• Title/Summary/Keyword: 대기모델

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Star Detectability Analysis of Daytime Star Sensor (주간 활용 별센서의 별 감지가능성 분석)

  • Nah, Ja-Kyoung;Yi, Yu;Kim, Yong-Ha
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.9
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    • pp.89-96
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    • 2005

  • This paper discusses the daytime atmospheric conditions and the possibility of daytime star detection with the purpose of practical use of the star sensor for daylight navigation. In order to estimate the daytime atmospheric data, we use the standard atmospheric model (LOWTRAN 7), from which atmospheric transmittance and radiance from background sky are calculated. Assuming the star sensor with an optical filter to reduce background radiation, different separation angles between the star sensor and the sun are set up to express the effect of the solar radiation. As considerations of field of view (FOV) of the star sensor, the variation of the sky background radiation and the star density of the detectable star are analyzed. In addition, the integration time to achieve a required signal-to-noise ratio and the number of the radiation-caused electrons of the charge coupled detector(CCD) working as the limit to daylight application of the star sensor are calculated.

  • https://doi.org/10.5139/JKSAS.2005.33.9.089 인용 PDF KSCI