中段目标的可见光辐射特性计算研究

中段目标的可见光辐射特性对目标的探测、跟踪与打击具有重要的指导意义。提出计算中段目标可见光辐射特性的方法，计算了目标表面的二向性反射，并考虑太阳的可见光辐射和云层背景反射太阳的可见光辐射情况下，计算了白天从同步卫星、低轨卫星和中轨卫星观测中段目标在可见光波段的辐射特性。研究结果表明：在可见光波段，目标对同步卫星辐射的光谱变化规律与太阳直射辐射的光谱变化一致，低轨卫星上观测目标的光谱辐射热流比同步卫星上观测的结果大3个数量级，中轨卫星上观测目标的光谱辐射热流比同步卫星上观测的结果大1个数量级。

Calculation for visible radiation of midcourse target

The visible radiation characteristics of midcourse targets are very important for detecting,tracking and attacking a target. A computation method is proposed for the purpose.The bidirectional reflectance was computed. The visible radiation characteristics of a midcourse target,which were observed by the synchronous satellite,low orbit satellite and mid-orbit satellite during the daytime,was also calculated considering the solar visible radiation and the solar visible radiation reflected by the cloud. The research results show that the spectral variation of visible radiation from the target observed by the synchronous satellite is the same as that of the direct sunlight radiation,the spectral radiant flux of the target observed by the low orbit satellite is three orders higher than that observed by the synchronous satellite in magnitude,and the spectral radiant flux of the target observed by the mid-orbit satellite is one order higher than that observed by the synchronous satellite in magnitude.