大气层外弹道式目标红外辐射特性两种计算方法对比

The Contrast of Two Method for Calculating the Infrared Signature of the Extraatmospheric Ballistic Target

空间外热流是影响大气层外弹道式目标红外辐射特性的重要因素,其计算方法产生的精度将直接决定大气层外弹道式目标红外辐射特性计算结果的精度。分别用简化和精细两种模型计算了大气层外弹道式目标的温度场、目标红外辐射分布,对比分析了自转和不自转条件下,两种模型在计算结果上的差异。计算结果表明两种模型在目标接收地球辐射和反照加热的计算上存在不一致,精细模型计算所需时间远大于简化模型计算所需时间。

The space thermal flow is one the main factor that affect the infrared signature of the extraatmospheric ballistic target, the calculating precision of the infrared signature of the extra-atmospheric ballistic target is determine by the precision of its calculating method. The temperature distribution and the infrared signature distribution of the extraatmospheric ballistic target are calculated using the simple model and the particular model respectively. The difference of the results obtained respectively by two models is analyzed for the rotating target and the not rotating target. The results show there is disagreement on the calculation results of the earth radiation and the earth albedo with two models, and the particular model takes more calculate time than the simple model.