Haiyong Wang, Wei Hua, Hao Xu, Yuan Xu. Centroiding Method for Star Image Spots under Interference of Sun Straylight Noise in a Star Sensor[J]. Acta Optica Sinica, 2021, 41(3): 0312005
- Acta Optica Sinica
- Vol. 41, Issue 3, 0312005 (2021)
Fig. 1. A simulated star map without noise
Fig. 2. A star map superimposed with sun straylight noise
Fig. 3. Effect drawing of a star image spot with white noise, background threshold and straylight slope noise
Fig. 3. [in Chinese]
Fig. 4. Effect of model slope estimate error Δk1 on centroiding error component of x-coordinate
Fig. 5. Effect of model slope estimate error Δk2 on centroiding error component of x-coordinate
Fig. 6. Effect of model slope estimate error Δb on centroiding error component of x-coordinate
Fig. 7. A sun straylight gray image generated from a nonlinear model
Fig. 8. Eight window locations on the diagonal with an interval of 128 pixels
Fig. 9. Straylight images produced by a sun simulator in lab
Fig. 10. Three-dimensional display of the 4th gray image (αSCA=56°) in Fig. 9
Fig. 11. Gray distribution of diagonal pixels of sun straylight image and the eight window locations
Fig. 12. Standard deviation comparison between three centroiding methods at eight windows
Fig. 13. Absolute error curves of centroided x-coordinate by three methods
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Table 1. Simulating test results under the nonlinear straylight background without white noise
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Table 2. Simulating test results based on a sun straylight gray image produced by a sun simulator
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