Application of BRDF for modeling on the optical scattering characteristics of space target

Cheng-ming Sun; Yan Yuan; Xiu-bao Zhang

doi:10.1117/12.835569

5 August 2009 Application of BRDF for modeling on the optical scattering characteristics of space target

Cheng-ming Sun, Yan Yuan, Xiu-bao Zhang

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 738338 (2009) https://doi.org/10.1117/12.835569
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

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.

Citation Download Citation

Cheng-ming Sun, Yan Yuan, and Xiu-bao Zhang "Application of BRDF for modeling on the optical scattering characteristics of space target", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 738338 (5 August 2009); https://doi.org/10.1117/12.835569

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