AI 中文总结
介绍HARMONI光谱仪为适应MCAO兼容性对NGSS系统重新优化，阐述重新规划对低阶波前传感器、外部支撑等的影响，以及高对比度模块和单共轭自适应光学传感器的变化，包含相关系统分析与新管理结构等内容。
AI 中文摘要
HARMONI是用于极大望远镜的首光、自适应光学辅助的近红外积分场光谱仪。它覆盖800nm以下至2400nm光谱范围，分辨率为3000至7000，空间采样为25mas和6mas，可在三种自适应光学模式下运行。该项目在经历两年重新规划设计阶段后进入最终设计阶段。本文描述了重新规划对自然导星传感器系统的影响，特别是对先前为低阶自适应光学操作优化的低阶波前传感器以及外部支撑和外壳的广泛改变。高对比度模块也受仪器像板比例修改的深刻影响，单共轭自适应光学传感器受益于减少的巡天视场要求。文中将给出变化描述及相关系统分析，包括需求传递、重新审视的功能分析和更新的产品分解结构，还将包括新系统管理结构和工作分解的要素。
英文摘要
HARMONI is the first-light, adaptive optics assisted, near-IR integral field spectrograph for the ELT. It covers a spectral range from below 800nm to 2400nm with resolving powers from 3000 to 7000 and spatial sampling of 25mas and 6mas. It can operate in three adaptive optics (AO) modes: single conjugate AO (SCAO), high-contrast AO (HCAO), and multi-conjugate AO (MCAO). The project is resuming its final design phase after a rescope design phase that has lasted two years. This paper describes the impact of the rescope on the natural guide star sensors (NGSS) system, imposing wide-ranging changes in particular to the low-order wavefront sensors (LOWFS) previously optimized for LTAO operation as well as on the external support and enclosure (ESE) whose external interfaces have changed. The high-contrast module (HCM) is also deeply affected due to the modified plate scale of the instrument, and the single-conjugate AO sensor (SCAOS) benefits from a reduced patrol field requirement. Description of the changes will be given together with the associated system analysis involving requirements flow-down, revisited functional analysis, and updated product breakdown structure. Elements of the new system management structure and work breakdown will also be included.
Comments13 pages, 19 figures
