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Effect of Space Environment on Spacecraft Surfaces in Sun-Synchronous Orbits

机译:太阳同步轨道上太空环境对航天器表面的影响

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摘要

Sixteen years of in-orbit measurements of thermal-control coating properties on sun-synchronous SPOT spacecraft are reported and analyzed. Their nonmonotonous evolution is shown to be due mostly to a succession of contamination and contaminant erosion by atomic oxygen phased with the solar cycle. A careful quantitative analysis of the different spacecraft walls and of their time evolution was performed via a semi-empirical model. The major outcome of the model was to indicate the role of the solar UV radiations in enhancing the deposition through chemical bonding. Further UV polymerization of contaminant layers over time was also presumed to be responsible for the decreasing efficiency of the erosion by atomic oxygen.
机译:报告并分析了16年太阳同步SPOT航天器热控制涂层性能的在轨测量。它们的非单调演变主要是由于与太阳周期相移的原子氧引起的一系列污染和污染物侵蚀。通过半经验模型对不同的航天器壁及其时间演变进行了仔细的定量分析。该模型的主要结果是表明太阳紫外线辐射通过化学键合增强沉积的作用。推测随着时间的流逝,污染物层的进一步紫外线聚合是造成原子氧腐蚀效率降低的原因。

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