红外辐射特性研究是对空间目标进行探测、识 别和跟踪的重要途径，而温度则是该研究的重要参数。为 了分析空间圆柱形目标的红外辐射特性，基于热网络思想及 差分方法，研究了空间目标表面温度场随网格数的变化规律，并得出 了获得准确的表面温度场分布所需划分的最少网格数。

Research on infrared radiation characteristics is one of the important ways to detect, recognize and track space targets. In this research, temperature is an important parameter. To analyze the infrared radiation characteristics of cylindrical targets in space, the change rule of space target’s surface temperature field with the number of grids is studied on the basis of node network mode and difference method. Finally, the minimum grid number required to obtain the accurate surface temperature field of a space target is derived.