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Proceedings Paper

Application of BRDF for modeling on the optical scattering characteristics of space target
Author(s): Cheng-ming Sun; Yan Yuan; Xiu-bao Zhang
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Paper Abstract

An accurate modeling method is presented for the optical scattering characteristics of space target. Bidirectional reflection distribution function (BRDF) can effectively describe spatial and spectral scattering characteristics of target's surface material. According to background radiation environment and surface appearance of space target, mathematical models on optical scattering characteristics of space target in visible and near infrared band are established by introducing BRDF. The calculation formulas of irradiance on entrance pupil of detector caused by reflected background radiation from target surface and magnitude of target are put forward. By setting target body rectangular coordinate system, the relative positions of background radiation sources, detector and target are determined in terms of coordinate conversion, and the "visual surfaces" of target to detector are defined by the vector coordinate method. Energy distribution on entrance pupil of detector and magnitude characteristics are calculated in detail by the given geometry dimension and surface physical parameters of the typical space target, and simulation results are demonstrated. The calculation results indicate that the irradiance of the solar sail has the same order as that of the target body, 10-6W/m2 , and the optical scattering characteristics of target are related to the geometrical shape, surface material of target, as well as with the real-time positions of the sun, the earth and the target. Simulation results prove the correctness of modeling method with BRDF.

Paper Details

Date Published: 6 August 2009
PDF: 10 pages
Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 738338 (6 August 2009); doi: 10.1117/12.835569
Show Author Affiliations
Cheng-ming Sun, Beijing Univ. of Aeronautics and Astronautics (China)
Yan Yuan, Beijing Univ. of Aeronautics and Astronautics (China)
Xiu-bao Zhang, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 7383:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications
Jeffery Puschell; Hai-mei Gong; Yi Cai; Jin Lu; Jin-dong Fei, Editor(s)

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