Method for Determining Optimal Radius Value of Defocused Image Spot of Star Sensor

Haiyong Wang; Tengfei Wang; Hongyu Zhu; Tao Liu; Chengjun Ge

doi:10.3788/LOP56.101101

Journals >Laser & Optoelectronics Progress >Volume 56 >Issue 10 >Page 101101 > Article

Laser & Optoelectronics Progress
Vol. 56, Issue 10, 101101 (2019)

Method for Determining Optimal Radius Value of Defocused Image Spot of Star Sensor

Haiyong Wang¹, Tengfei Wang^1、*, Hongyu Zhu¹, Tao Liu², and Chengjun Ge²

Author Affiliations

¹ School of Astronautics, Beihang University, Beijing 100191, China

² Beijing Aerospace Wanyuan Science & Technology Co. Ltd., Beijing 100176, China;

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DOI: 10.3788/LOP56.101101 Cite this Article Set citation alerts

Haiyong Wang, Tengfei Wang, Hongyu Zhu, Tao Liu, Chengjun Ge. Method for Determining Optimal Radius Value of Defocused Image Spot of Star Sensor[J]. Laser & Optoelectronics Progress, 2019, 56(10): 101101 Copy Citation Text

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Fig. 1. Simulated star point based on IPSF model. (a) σs=0.6 pixel; (b) σs=1.5 pixel

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Fig. 2. Three-dimensional distribution of centroid localization error σe with respect to Gaussian radius σs and background noise σg

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Fig. 3. Fitting result of centroid localization error model

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Fig. 4. Two-dimensional map of equal precision lines for centroid location

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j	i
j					0	1	2	3	4
0	2.7311×10^-2	2.5645×10^-2	-1.1732×10^-2	5.7245×10^-2	-1.2370×10^-2
1	-8.6410×10^-2	-5.9339×10²	3.8144×10⁵	-2.0382×10⁸	4.4994×10^-2
2	9.9384×10^-2	5.5022×10²	-4.2957×10⁵	2.4146×10⁸	-5.3916×10^-2
3	-4.9407×10^-2	-2.2699×10²	2.0010×10⁵	-1.1607×10⁸	2.6108×10¹⁰
4	9.0078×1 $\begin{matrix} {0^{-}}^{3} \end{matrix}$	3.4404×1 $\begin{matrix} {0^{-}}^{1} \end{matrix}$	-3.2924×10^-4	1.9515×10⁷	-4.4130×10^-9

Table 1. Least square surface fitting coefficient matrix of error model

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