Bidirectional Reflectance Distribution Function Modeling Approach of Space Objects’ Fold Material

Xia, 汪夏 Wang; Yasheng, 张雅声 Zhang; Can, 徐灿 Xu; Peng, 李鹏 Li; Feng, 张峰 Zhang

doi:10.3788/aos201939.1024001

Cited by 3 publications

(2 citation statements)

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“…in which θ is the angle between the laser incident direction and the normal vector of the target surface; ρ r is the BRDF parameter of the target; A is the specular reflection amplitude component of the target; B is the diffuse reflection amplitude component of the target; s is the specular reflection coefficient of the target; and m is the diffuse reflection coefficient of the target. The BRDF parameters of an ideal fully diffuse reflecting material, a fully specular reflecting material, and several commonly used materials [16,17] on the satellite surface are shown in Table 1. Figure 2 shows the BRDF parameter curves of various materials when the angle θ between the laser incidence direction and the normal vector of the target surface varies from 0° to 90°.…”

Section: Space Targetsmentioning

confidence: 99%

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Analysis and Simulation of Space-Based LM-APD 3D Imaging

Wang

Lin²,

Zhang³

et al. 2023

Electronics

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The linear mode avalanche photodiode (LM-APD) array has the capability of real-time 3D imaging for moving targets, which is a promising 3D imaging means in space. The main system parameters of the LM-APD array 3D imaging system, the characteristics of the space target itself, and the relative positional relationship between them will affect the 3D imaging results at the same time, and there is a need for an appropriate simulation method to describe the space target point cloud acquired by the LM-APD array 3D imaging system under different conditions. We propose a simulation method for the 3D imaging of space targets with LM-APD arrays, which takes the characteristics of the space targets and the relative position into consideration, and build a link from the laser to the receiving system to simulate the echo waveform of each pixel in the LM-APD array. The experiment results under different conditions show that the proposed simulation method can accurately describe the imaging results of the LM-APD array 3D imaging system for space targets with different shapes, materials, and motion states, which providing theoretical and data support for the design of LM-APD array 3D imaging systems.

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Section: Space Targetsmentioning

confidence: 99%

“…In order to ensure the working distance and dynamic range of 3D imaging, it is usually necessary to amplify the echo signal in multiple stages. The gain of N amplifiers G NA and the noise factor F NA are shown in Equation (17),…”

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confidence: 99%