月球南极水冰探测方法综述
Review of detection methods for water ice at lunar south pole
【目的】月球南极永久阴影区由于低温和长期无日照的特点,成为月球水冰的关键储集区域。明确该区域水冰的分布范围、丰度和赋存形态是揭示月球水源起源和演化过程的核心科学问题,也是实现月球原位资源利用和可持续深空探测的关键前提。【方法】已有研究方法包括轨道遥感技术与间接分析手段等。在轨道遥感方面,应用中子与伽马射线光谱、近红外与热红外光谱及雷达极化成像技术,分析其原理和探测能力。在间接分析方面,采用撞击羽流分析、热环境建模和微冷阱分析方法评估水冰的稳定性。【结果】原位钻探和热释放气体分析被确立为水冰存在的最终验证技术。通过Lunar Prospector、Chandrayaan-1、Lunar Reconnaissance Orbiter及LCROSS等任务的数据分析,评估了不同探测方法的精度、适用场景和局限性,揭示了各方法在水冰分布探测中的表现差异。【结论】未来的技术发展方向包括突破高空间分辨率遥感技术,以提升水冰分布制图精度;发展具备自主导航和精细采样能力的月面移动机器人,支持复杂地形的原位探测;构建“轨道-原位-模拟”多尺度数据融合框架,形成对月球水冰从宏观分布到微观机理的全面认知,为月球基地建设与深空探测提供技术支撑。
[Objective] The permanently shadowed regions(PSRs) at the lunar south pole, due to their low temperatures and prolonged absence of sunlight, have become key reservoirs for lunar water ice. Clarifying the distribution, abundance, and form of occurrence of water ice in this region is a core scientific question for understanding the origin and evolution of lunar water sources. It is also a critical prerequisite for enabling in-situ resource utilization and sustainable deep space exploration on the Moon. [Methods] Existing research method include orbital remote sensing technologies and indirect analytical techniques. In terms of orbital remote sensing, neutron and gamma-ray spectroscopy, near-infrared and thermal infrared spectroscopy, and radar polarimetric imaging techniques are applied to analyze their principles and detection capabilities. For indirect analysis, methods such as impact plume analysis, thermal environment modeling, and micro-cold trap analysis are employed to evaluate the stability of water ice. [Results] In-situ drilling and thermal gas release analysis have been established as the final verification techniques for the presence of water ice. Through data analysis from missions such as Lunar Prospector, Chandrayaan-1, Lunar Reconnaissance Orbiter, and LCROSS, the accuracy, applicable scenarios, and limitations of different detection method are evaluated, revealing differences in their performance in detecting the distribution of water ice. [Conclusion] The future directions of technological development include breakthroughs in high-spatial-resolution remote sensing technologies to improve the accuracy of water ice distribution mapping; the development of lunar surface mobile robots equipped with autonomous navigation and precise sampling capabilities to support in-situ exploration in complex terrains; and the establishment of an “orbital-in-situ-simulation” multi-scale data fusion framework. This will form a comprehensive understanding of lunar water ice from macroscopic distribution to microscopic mechanisms, thereby providing technical support for lunar base construction and deep space exploration.
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