Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Analysis of the Influence of Atmospheric Turbulence on the Ground Calibration of a Star Sensor

  • Xian Ren (Department of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Lingyun Wang (Department of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Guangxi Li (Department of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Bo Cui (Department of Optoelectronic Engineering, Changchun University of Science and Technology)
  • Received : 2023.09.12
  • Accepted : 2023.12.27
  • Published : 2024.02.25
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Abstract

Under the influence of atmospheric turbulence, a star's point image will shake back and forth erratically, and after exposure the originally small star point will spread into a huge spot, which will affect the ground calibration of the star sensor. To analyze the impact of atmospheric turbulence on the positioning accuracy of the star's center of mass, this paper simulates the atmospheric turbulence phase screen using a method based on a sparse spectrum. It is added to the static-star-simulation device to study the transmission characteristics of atmospheric turbulence in star-point simulation, and to analyze the changes in star points under different atmospheric refractive-index structural constants. The simulation results show that the structure function of the atmospheric turbulence phase screen simulated by the sparse spectral method has an average error of 6.8% compared to the theoretical value, while the classical Fourier-transform method can have an error of up to 23% at low frequencies. By including a simulation in which the phase screen would cause errors in the center-of-mass position of the star point, 100 consecutive images are selected and the average drift variance is obtained for each turbulence scenario; The stronger the turbulence, the larger the drift variance. This study can provide a basis for subsequent improvement of the ground-calibration accuracy of a star sensitizer, and for analyzing and evaluating the effect of atmospheric turbulence on the beam.

Keywords

Acknowledgement

Science and Technology Development Plan of Jilin Province of China (Grant no. 20220201089GX).

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