The Lunar Polar Hydrogen Mapper (LunaH-Map) mission will map the distribution of hydrogen around the lunar South Pole using a miniature neutron spectrometer. The mission builds upon a decade of lunar science, which has revealed both regional and more localized enrichments of water ice near the lunar poles. Localized enrichments are primarily within permanently shadowed regions (PSRs) and craters throughout the South Pole. The spatial extent of these regions is often below the resolution of previous neutron instruments that have flown on lunar missions. The neutron leakage spectrum from planetary surfaces is primarily sensitive to hydrogen abundance in the top meter of regolith, however, for neutron spectrometers with omnidirectional sensitivity, the spatial resolution is limited by the spacecraft orbital altitude above the surface. A low altitude measurement from a distance on the same scale of the PSRs could spatially isolate and constrain the hydrogen enrichments both within and around within those regions. A small spacecraft mission is ideally suited to acquire the low-altitude measurements required to localize hydrogen enrichments using neutron spectroscopy at the lunar South Pole. LunaH-Map will use a solid iodine ion propulsion system, X-Band radio communications through the NASA Deep Space Network, star tracker, Command & Data Handling System, and EPS systems from Blue Canyon Technologies, solar arrays from MMA Designs, LLC, mission design and navigation by KinetX. Spacecraft systems design, integration, qualification, test, and mission operations are performed by Arizona State University, AZ Space Technologies and Qwaltec.

中文翻译：

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月球极地氢映射器立方体卫星任务

Lunar Polar Hydrogen Mapper (LunaH-Map) 任务将使用微型中子光谱仪绘制月球南极周围的氢分布图。该任务建立在十年的月球科学基础上，该科学揭示了月球两极附近区域性和更局部的水冰富集。局部富集主要位于整个南极的永久阴影区 (PSR) 和陨石坑内。这些区域的空间范围通常低于之前执行过月球任务的中子仪器的分辨率。行星表面的中子泄漏光谱主要对风化层顶部的氢丰度敏感，然而，对于具有全向灵敏度的中子光谱仪，空间分辨率受到地表上方航天器轨道高度的限制。在 PSR 的相同尺度上，从远处进行低空测量可以在空间上隔离和限制这些区域内部和周围的氢富集。小型航天器任务非常适合获取在月球南极使用中子光谱定位氢富集所需的低空测量。LunaH-Map 将使用固体碘离子推进系统、通过 NASA 深空网络的 X 波段无线电通信、恒星跟踪器、命令和数据处理系统、Blue Canyon Technologies 的 EPS 系统、MMA Designs, LLC 的太阳能电池阵列，任务由 KinetX 设计和导航。航天器系统设计、集成、鉴定、测试和任务操作由亚利桑那州立大学、AZ Space Technologies 和 Qwaltec 执行。