Investigations that can be conducted at the Artemis III candidate landing regions will benefit from the knowledge of the thermal environment within permanently shadowed regions (PSRs). Within PSRs, secondary illumination controls the surface temperature, varying diurnally and seasonally, affecting the stability and concentration of volatiles cold-trapped within the PSRs. In this case study, we characterize the dynamic nature of secondary illumination at four PSRs that overlap five of the Artemis III candidate landing regions. Our analysis is based on secondary illumination model-generated images paired with PSR images acquired by ShadowCam on board the Korean Pathfinder Lunar Orbiter. We find that illumination and thermal conditions can change rapidly within the PSRs, and knowledge of time-variable secondary illumination can be decisive for the efficient design of investigations and sample collection operations at the PSRs.

中文翻译：

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Artemis III 候选着陆区域内永久阴影中的动态二次照明

在阿耳忒弥斯 III 候选着陆区域进行的调查将受益于对永久阴影区域 (PSR) 内热环境的了解。在 PSR 内，二次照明控制表面温度，随昼夜和季节变化，影响 PSR 内冷捕挥发物的稳定性和浓度。在本案例研究中，我们描述了与五个 Artemis III 候选着陆区域重叠的四个 PSR 处二次照明的动态性质。我们的分析基于二次照明模型生成的图像以及韩国探路者月球轨道飞行器上 ShadowCam 采集的 PSR 图像。我们发现 PSR 内的照明和热条件可能会快速变化，并且时变二次照明的知识对于 PSR 的调查和样本收集操作的有效设计具有决定性作用。