Research on the Autonomous Star Sensor Based on Indirectly Sensing Horizon and its Optical Design

Yanxiong, 伍雁雄 Wu; Xin, 张鑫 Zhang; Jizhen, 张继真 Zhang; Lingjie, 王灵杰 Wang; Hemeng, 曲贺盟 Qu; Yang, 朱杨 Zhu; Fei, 曾飞 Zeng

doi:10.3788/aos201535.0222001

Cited by 4 publications

(3 citation statements)

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“…Atmospheric refraction is an important research branch in the field of remote sensing The atmospheric refractive index will affect remote sensing image positioning, space-based laser communication, star sensitive data processing and other applications [1][2][3][4][5] , so domestic and foreign scholars have also analyzed the factors that affect the atmospheric refractive index [6][7][8][9][10] . In reference [1], the authors studied the estimation of stellar refraction based on single band observations.…”

Section: Introductionmentioning

confidence: 99%

An atmospheric refractive index estimation method based on multispectral stellar observation data

Huang

Zhang

2023

Advanced Fiber Laser Conference (AFL2022)

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The theoretical model of atmospheric refractive index based on the standard atmospheric environment cannot explain the atmospheric refractive index when optical satellites detect targets. Aiming at this problem, a method for estimating the refractive index of the atmosphere based on multispectral stellar observation data is proposed. Based on optical satellites' multispectral stellar observation data, according to the principle of deflection when the stellar light passes through the atmosphere, the optical path model of the stellar light refracted by the atmosphere is established under the assumption of a layered spherical atmosphere. A method of using multispectral segment stars to measure the actual light and the iterative forward feedback of stellar theoretical light is proposed, to estimate the refractive index of each layer of the atmosphere of the layered atmosphere to different spectral segments of light.

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Section: Introductionmentioning

confidence: 99%

An atmospheric refractive index estimation method based on multispectral stellar observation data

Huang

Zhang

2023

Advanced Fiber Laser Conference (AFL2022)

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“…The FOV is too small to detect enough refracted stars. Based on the principle of autonomous navigation, Wu et al [7] designed a star sensor working in the visible light band in 2015. Because the number of stars in the H-band is much greater than that in the visible band, Xu and Jiang [8] designed an infrared optical system with an FOV of 4°.…”

Section: Introductionmentioning

confidence: 99%

“…In 2020, Bai et al [10] designed a visible catadioptric star sensor for the satellite with an aperture of 285 mm for lenses, an FOV of 2.8°, and an aperture of 257 mm for mirrors. Because the strong limb background during the day is ignored, the existing star sensors [7][8][9][10] were unable to detect enough refracted stars during the day.…”

Section: Introductionmentioning

confidence: 99%

Optical system design method of the all-day starlight refraction navigation system

Wu,

Wang,

Yan

2023

J. Eur. Opt. Society-Rapid Publ.

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The application of starlight refraction navigation to spacecraft and space weapons is a significant development direction. Observing enough refracted stars for the star sensor in a strong limb background is an urgent problem. The all-day optical system parameters are analyzed based on the star detection requirement and navigation accuracy. Combined with primary aberration theory, the prime-focus catadioptric optical system is selected to meet the design requirements of a wide field of view (FOV) and tight structure. An H-band (1.52um-1.78um) star sensor is designed with a FOV of 6°, a focal length of 831mm, an effective aperture of 253mm, and a relative distortion of 0.03%. The energy concentration of the star point is 85% within 30um, and the maximum lateral chromatic aberration is 2.9um, which meets the imaging requirements. Furthermore, a baffle is designed to avoid the influence of direct sunlight on stellar imaging. The proposed method can provide a theoretical foundation and technical support for the optical design of the refraction star navigation.

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A new method for high-precision starlight refraction indirect horizon-sensing positioning of atmospheric flight vehicles

Zhan,

Wang,

et al. 2024

Advances in Space Research

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Research on the Autonomous Star Sensor Based on Indirectly Sensing Horizon and its Optical Design

Cited by 4 publications

References 0 publications

An atmospheric refractive index estimation method based on multispectral stellar observation data

An atmospheric refractive index estimation method based on multispectral stellar observation data

Optical system design method of the all-day starlight refraction navigation system

A new method for high-precision starlight refraction indirect horizon-sensing positioning of atmospheric flight vehicles

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