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Proceedings Paper

Influence of atmospheric turbulence on detecting performance of all-day star sensor
Author(s): Yue Pan; Hu Wang; Yang Shen; Yaoke Xue; Jie Liu
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Paper Abstract

All-day star sensor makes it possible to observe stars in all-day time in the atmosphere. But the detecting performance is influenced by atmospheric turbulence. According to the characteristic of turbulence in long-exposure model, the modulation transfer function, point spread function and encircled power of the imaging system have been analyzed. Combined with typical star sensor optical system, the signal to noise ratio and the detectable stellar magnitude limit affected by turbulence have been calculated. The result shows the ratio of aperture diameter to atmospheric coherence length is main basis for the evaluation of the impact of turbulence. In condition of medium turbulence in day time, signal to noise ratio of the star sensor with diameter 120mm will drop about 4dB at most in typical work environment, and the detectable stellar limit will drop 1 magnitude.

Paper Details

Date Published: 26 January 2016
PDF: 6 pages
Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 990318 (26 January 2016); doi: 10.1117/12.2211689
Show Author Affiliations
Yue Pan, Xi’an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Hu Wang, Xi’an Institute of Optics and Precision Mechanics (China)
Yang Shen, Xi’an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Yaoke Xue, Xi’an Institute of Optics and Precision Mechanics (China)
Jie Liu, Xi’an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 9903:
Seventh International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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