基于MIGHTI/ICON的O (S) 和O (D) 空气发光观测的热层温度的检索
Optics express
|November 11, 2025
概括
这项研究引入了一种新的方法,使用原子氧气气光辐射来测量热层温度概况. 该技术准确地绘制了90-250公里的温度,这对于了解上层大气动态至关重要.
科学领域:
- 太空物理学和航空学
- 大气科学 大气科学
- 遥感 遥感 遥感 遥感
背景情况:
- 热层温度概况对于了解上层大气物理和太空天气至关重要.
- 现有的温度检索方法在覆盖范围或准确性方面存在局限性.
- 原子氧气的气光辐射 (O(1S) 和O(1D)) 提供了远程感测热层温度的潜力.
研究的目的:
- 开发和验证用于构建全球热层温度概况的联合检索方法.
- 使用O (S) 和O (D) 气光发射信号进行增强的温度测量.
- 提供一个准确可靠的方法,用于90-250公里的热层温度检索.
主要方法:
- 建立了基于空气发光辐射机制和多普勒扩展理论的理论模型.
- 采用多普勒异质干扰仪的观测原理.
- 从MIGHTI (全球高分辨率热层成像的米歇尔森干扰仪) 提取干扰边缘数据,使用O (S) 和O (D) 气光,结合"洋剥离"算法和希尔伯特-黄变换来检索温度概况.
主要成果:
- O ((1S) 和 O ((1D) 的气光排放适用于分别在90-170公里和160-250公里高度范围内的温度检索.
- 联合检索方法实现了50K内的总体温度偏差,最佳不确定性为±3K和±5K.
- 温度检索错误控制在20K以内,最小误差约为5K,与实证模型和其他仪器进行验证.
结论:
- 提出的使用原子氧气气光辐射的联合检索方法对于热层温度分析是准确和可靠的.
- 这种技术有效地覆盖了热层的关键90-250公里高度区域.
- 该方法为研究上层大气动力学和太空环境提供了一种有价值的新方法.
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