Abstract
The background radiation contribution is an important component of target scattering characteristics. A study is made on target scattering characteristics from complex background radiation, with contributions of the sun and the sea and sky background and that among each components of target. In this paper, the shadowing function of sea surface is numerically calculated by using the Z-BUFFER shadowing elimination algorithm, and the scattering of each facet of sea surface and target from the sun and the sky background infrared radiation is computed based on the rough surface scattering model as well as the infrared self-radiation of the sea surface. Finally, a numerical calculation of the forward and backward radiance of a near-sea circular cylinder scattering from the sun, the sea and sky background infrared radiation of near sea target and the infrared self-radiation of the target skin have been made. The results show the important influences of each contribution on target scattering from the sea and sky background radiation in 3-5 μm and 8-12 μm bands.
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