AI 中文总结
针对NASA 2025年发射的Carruthers地冕观测台，开发数值模拟器模拟其GeoCoronal Imager成像，以验证数据处理算法，为外逸层研究提供支撑。
AI 中文摘要
Carruthers地冕观测台于2025年9月发射，是NASA首个从地日拉格朗日L1点的晕轨道这一遥远观测位置，研究地球外逸层基本性质的任务。其主载荷为GeoCoronal Imager（地冕成像仪），包含两台共轴光度成像仪，可同时以宽视场和窄视场测量外逸层氢原子在121.6 nm（莱曼-α，即Ly-α）处的紫外发射辐射。为验证Carruthers数据处理流水线所用的定标与氢密度反演算法，我们开发了一套综合数值模拟器，以生成与在轨实际成像仪采集的图像相似的真实图像。本文详述了模拟外逸层发射、背景场景分量及仪器测量模型所需的算法，这些是生成合成原始图像所必需的。
英文摘要
The Carruthers Geocorona Observatory, launched in September 2025, is NASA's first mission devoted to investigating the fundamental nature of Earth's exosphere from its distant vantage in halo orbit around the Earth-Sun Lagrange (L1) point. Its primary payload, the GeoCoronal Imager, consists of two coaligned photometric imagers that measure the radiance of ultraviolet emission at 121.6 nm (Lyman-$α$, or Ly-$α$) from exospheric hydrogen atoms simultaneously at wide and narrow fields of view. In order to validate the calibration and hydrogen density retrieval algorithms used in the Carruthers data processing pipeline, we developed a comprehensive numerical simulator to produce realistic images similar to those collected by the actual imagers on orbit. This paper details the algorithms used to simulate the exospheric emissions, background scene components, and instrument measurement model necessary to produce synthetic raw images.
Comments25 pages, 9 figures, preprint, under review at Space Science Reviews
