低轨红外探测卫星对大气层内高动态目标的探测能力研究

Study of Detection Capability of Low Orbit Infrared Detection Satellite to High Dynamic Target in Atmosphere

对大气背景进行了分析,并经计算得到了不同俯仰角下的大气辐射强度和大气透过率;通过分析大气层内高动态目标的辐射原理,给出了高温气体影响下的目标红外特性的计算模型,并给出了不同波段的目标红外辐射强度的计算结果;根据计算公式得到了信杂比和探测距离,并对其进行了分析,最后得出了探测能力有限的结论。

The atmospheric background is analyzed and the atmospheric radiation intensity and trans- mittance at different pitch angles are calculated. By analyzing the radiation principle of a high dynamic target in atmosphere, both the calculation model of the infrared characteristics of the target affected by high temperature gas and the calculation result of the infrared radiation intensity of the target in different wavebands are given. The Signal to Clutter Ratio （SCR） and detection range are calculated by formulas and are analyzed. Finally, the conclusion that the detecting ability is limited is reached.