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The characteristics of space targets are the basis of detecting and identifying space targets. The size, shape and material of the space target are closely related to its scattering characteristics. Starting with the three typical influencing factors of dimensional accuracy, shape and material, this paper designed a typical simple body and assembly model with 15% dimensional accuracy, different shapes and different materials, and analyzed the influence of dimensional accuracy, shape and material on scattering characteristics according to the calculation results of the model's omnidirectional luminosity. The research results show that, when the size deviation is less than 15%, it has little effect on the scattering characteristics of the target. When the size is equivalent, the influence of different shapes on the scattering characteristics of the target is not significant, and the surface material has the greatest influence on the scattering characteristics of the target.
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