卡鲁瑟斯任务概念与性能
The Carruthers Mission Concept and Performance
AI总结：
Carruthers是NASA的太阳物理学机会任务，在日地L1点运行，通过GCI仪器观测地球氢外逸层，研究大气逃逸等过程，基线任务两年，推进剂可支持超十年
AI中文摘要：
卡鲁瑟斯日冕层天文台（Carruthers，原GLIDE）是NASA太阳物理学科学机会任务，通过太阳-地球探测器（STP）计划实施，于2025年9月以拼车方式发射。Carruthers是首个致力于通过观测121.6nm的地球日冕层莱曼-α发射，对地球氢外逸层进行连续全球成像的航天任务。该天文台在日地L1点的晕轨道上运行，距离为130万至170万公里，可每小时时间尺度、以前所未有的空间分辨率获取外逸层主要成分原子氢的三维分布，这些新数据为理解控制大气逃逸、地空间耦合和太阳风相互作用的过程提供关键。Carruthers搭载日冕层成像仪（GCI），这是一种双通道紫外成像仪器，包括用于内外逸层高分辨率观测的窄场成像仪（NFI）和用于扩展氢晕天气成像的宽场成像仪（WFI）。除了一个学生提供的实验外，该仪器套件是三轴稳定航天器上的唯一有效载荷，设计用于在L1点约178天的晕轨道全程支持天底观测。观测还测量行星际莱曼-α背景，以分离日球层和日冕层发射。学生主导的实验在轨道部分期间监测太阳莱曼-α和极紫外发射。科学数据通过深空网络以高达1 Mbit/s的数据速率返回。两年基线任务于2026年3月开始，推进剂储备能够支持超过十年的轨道维持和机动。
英文摘要：
The Carruthers Geocoronal Observatory (Carruthers), formerly GLIDE, is a NASA Heliophysics Science Mission of Opportunity implemented through the Solar Terrestrial Probes (STP) Program and launched as a rideshare in September 2025. Carruthers is the first spaceflight mission edicated to continuous global imaging of Earth's hydrogen exosphere through observations of geocoronal Lyman-$α$ emission at 121.6 nm. The observatory operates at distances of 1.3-1.7 million km in a halo orbit about the Sun-Earth L1 point, enabling retrieval of the three-dimensional distribution of atomic hydrogen, the dominant constituent of the exosphere, on hourly timescales and unprecedented spatial resolution. These new data provide the key to understanding processes governing atmospheric escape, geospace coupling, and solar-wind interaction. Carruthers carries the GeoCoronal Imager (GCI), a dual-channel ultraviolet imaging instrument comprising the Narrow-Field Imager (NFI) for high-resolution observations of the inner exosphere and the Wide-Field Imager (WFI) for synoptic imaging of the extended hydrogen halo. Along with a student-provided experiment, the instrument suite is the sole payload aboard a three-axis-stabilized spacecraft designed to support nadir viewing throughout the $\sim178$ day halo orbit about L1. Observations also measure the interplanetary Lyman-$α$ background, enabling separation of heliospheric and geocoronal emissions. The student-led experiment monitors solar Lyman-$α$ and extreme ultraviolet emission during portions of the orbit. Science data are returned through the Deep Space Network at data rates up to 1 Mbit s$^{-1}$. The two-year baseline mission begins in March 2026, with propellant reserves capable of supporting more than ten years of orbit maintenance and maneuvers.
