激光与光电子学进展

2014

DOI: 10.3788/lop51.092801

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Fresnel Reflection-Based Optical Fiber Sensor for Quasi-Distributed Refractive Index Measurement

袁剑英 Yuan Jianying¹,

赵春 Zhao Chun²,

柳齐亮 Liu Qiliang³

et al.

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“…对于漫反射部分，将目标视为朗伯面，在各个方向上辐射亮度相同；对于镜面反射部分，反射能量主要集中在发生镜面反射的面元。将卫星视为有限个面元的集合，卫星星等值通过各个面元的计算量累加得到 [9] 。对每个面元进行分析，镜面反射分量为…”

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Apparent Magnitude Measurement of Geosynchronous Orbit Space Object Based on Phong Model

Hao¹,

2016

激光与光电子学进展

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There are a lot of spatial objects running along the geosynchronous orbit (GEO). Estimation of the shape and attitude of space objects by using light curves provides a method for object tracking, identification and surveillance. The temporal and spatial relationship among the sun, satellite and observation station under different orbit parameters is obtained via coordinate transformation by using the STK software. According to the definition of apparent magnitude, the calculation model suitable for cube, prism and cylinder objects is derived with the facet method based on the Phong model. Through comparison with the measured data, it is demonstrated that the simulation error of the model is about 3%, the simulation result is far better than the result obtained by the apparent magnitude model only characterized by the diffuse reflectance. Based on the Matlab software, the light curves of satellites with different segments, shapes and sizes are simulated. The study shows that the nonlinear filtering technique is adopted for inversion if obtained light curves have better quality, otherwise the two-facet analytical model is used. The research offers a reference for the inversion based on light curves.

“…对于漫反射部分，将目标视为朗伯面，在各个方向上辐射亮度相同；对于镜面反射部分，反射能量主要集中在发生镜面反射的面元。将卫星视为有限个面元的集合，卫星星等值通过各个面元的计算量累加得到 [9] 。对每个面元进行分析，镜面反射分量为…”

Section: -unclassified

Apparent Magnitude Measurement of Geosynchronous Orbit Space Object Based on Phong Model

Hao¹,

2016

激光与光电子学进展

View full text Add to dashboard Cite

There are a lot of spatial objects running along the geosynchronous orbit (GEO). Estimation of the shape and attitude of space objects by using light curves provides a method for object tracking, identification and surveillance. The temporal and spatial relationship among the sun, satellite and observation station under different orbit parameters is obtained via coordinate transformation by using the STK software. According to the definition of apparent magnitude, the calculation model suitable for cube, prism and cylinder objects is derived with the facet method based on the Phong model. Through comparison with the measured data, it is demonstrated that the simulation error of the model is about 3%, the simulation result is far better than the result obtained by the apparent magnitude model only characterized by the diffuse reflectance. Based on the Matlab software, the light curves of satellites with different segments, shapes and sizes are simulated. The study shows that the nonlinear filtering technique is adopted for inversion if obtained light curves have better quality, otherwise the two-facet analytical model is used. The research offers a reference for the inversion based on light curves.

Temperature-insensitive fiber-optic tip sensors array based on OCMR for multipoint refractive index measurement

¹

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²

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³

et al. 2019

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