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为深入了解月球表面的热环境,根据月表红外发射率随温度变化以及太阳光反射率随入射方向变化的特点,建立了月表的多温段变反射率辐射计算模型。将该模型与月壤非稳态导热微分方程结合,并考虑日、月相对运动关系,形成了月表温度计算方法。在计算程序验证的基础上,分析了月表温度的变化规律与控制因素,比较了月海与月陆两种月表单元的温度差异。结果表明,多温段变反射率热辐射计算模型比传统的两波段热辐射计算模型能够更准确地预测月表温度及变化规律。
In order to understand the thermal environment of lunar surface deeply, according to the characteristics of the change of infrared emissivity with temperature and the change of solar reflectance with incident direction, a model of multi-temperature variable reflectivity radiation of lunar surface was established. The model is combined with the unsteady thermal differential equation on the lunar soil and the relative movement between the sun and the moon is taken into consideration to form the lunar surface temperature calculation method. Based on the verification of calculation program, the variation rules and control factors of lunar surface temperature are analyzed, and the temperature differences between lunar and lunar surface units are compared. The results show that the calculation model of variable reflectivity heat radiation in multi-temperature section can predict the lunar surface temperature and variation more accurately than the traditional two-band heat radiation calculation model.