低地球轨道原子氧?太阳远紫外协合效应地面试验条件探讨

低地球轨道航天器表面聚合物材料受中性大气原子氧和太阳远紫外辐照的同时作用，表现出不同于单一因素分别作用的协合效应。文章在总结现有地面试验设备参数和不足的基础上，分析原子氧注量、远紫外曝辐照度随在轨时间变化的计算方法和输入数据特性，并以正立方体卫星为例计算得到典型轨道不同太阳活动环境下迎风面和非迎风面的原子氧注量和远紫外曝辐照度，以及远紫外曝辐照度/原子氧注量之比（注量比）随在轨时间的变化后，提出将该注量比参数作为有关地面试验条件制定的依据之一，以提高航天器外露材料原子氧?远紫外协合效应地面试验模拟的有效性。

The test conditions in the study of synergistic effects of atomic oxygen and far ultraviolet irradiation in low Earth orbit

The polymer materials on the surface of the low Earth orbit(LEO) spacecraft are subjected to the simultaneous action of the neutral atmospheric atomic oxygen(AO) and the solar far ultraviolet(FUV) radiation. This paper reviews the related ground test facilities both at home and abroad, and it is shown that an in-depth study of the simulation parameters is important. We propose a method for calculating the fluence of the AO and the irradiance of the FUV against the on-orbit time, and analyzes the input data. The AO flux and the FUV radiance in the solar max year and the solar min year are calculated for a cubic satellite model in a typical orbit with regard to the ram face and the non-ram face, respectively. And the ratio of the FUV irradiation to the AO fluence is traced with the orbiting time. The ratio between them is suggested as a key parameter of the test conditions, to improve the effectiveness of the ground test simulation for studying the synergistic effect of the atomic oxygen and the far-ultraviolet radiation to the exposed polymer materials.