Near-infrared star map simulation for starlight refraction sensor based on ray tracing

Wang, Hongyuan; Wu, Shaochong; Wang, Bingwen; Yan, Zhiqiang; Yao, Shuai; Zeliu, Chuanjiang

doi:10.1016/j.infrared.2023.104760

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Under the condition of Global Navigation Satellite System (GNSS) rejection, starlight refraction navigation can still provide position and attitude information for satellites and space weapons [1]. More and more researchers have paid considerable attention to this promising autonomous celestial navigation [2,3]. In the starlight refraction navigation system, the star sensor observes three non-refracted stars to solve the attitude.…”

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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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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Parameter Optimization for an All-Time Star Sensor Based on Field of View Gated Technology

Zhong,

Wei,

Jiang

et al. 2024

IEEE Sensors J.

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Fluctuations in Refracted Star Signals Caused by the Stratospheric Internal Gravity Waves

Wu,

Wang,

Zheng

et al. 2024

Remote Sensing

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The application of starlight refraction navigation to spacecraft and space weapons is a significant development. However, the irregular stratospheric atmosphere can cause fluctuations in relative light intensity and refraction angles of refracted stars, which need to be analyzed to provide guidance for system design and simulation verification. The internal gravity wave (IGW) is an important component of the irregular atmosphere. Based on the Rytov approximation, closed-form approximations were obtained, which can more intuitively reveal the relationship between the IGW parameters and the star signals’ statistical characteristics. From the GOMOS observations, the influence of the stratosphere from 25 km to 35 km on the fluctuations in relative intensity and refraction angles was analyzed in this study. As the height increased, the fluctuations in starlight signals gradually weakened. Compared with the numerical solution, the error of the closed-form approximations for relative intensity fluctuations was no more than 10%, and the error for refraction angle fluctuations was 1.0%. Compared with the measured data, the error of the closed-form approximations for relative intensity was 6.3%. The proposed approximations better reflect the relationship between IGW parameters and star signal fluctuations compared to the existing approximation. The research in this article can provide a reference for application assessment based on starlight refraction navigation.

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Near-infrared star map simulation for starlight refraction sensor based on ray tracing

Cited by 3 publications

References 19 publications

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

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

Parameter Optimization for an All-Time Star Sensor Based on Field of View Gated Technology

Fluctuations in Refracted Star Signals Caused by the Stratospheric Internal Gravity Waves

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