Development of Spatial Heterodyne Spectroscopy for Atmospheric Remote Sensing Studies

大气遥感研究空间外差光谱学的发展

• 批准号: 9612228
• 负责人: Fred Roesler
• 金额: $ 44.99万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612228&HistoricalAwards=false
• 关键词: Development; Spatial; Heterodyne; Spectroscopy; Atmospheric

Spatial heterodyne spectroscopy (SHS), a relatively new and undeveloped spectroscopic method, has fundamental advantages over its relative, Fourier transform spectroscopy (FTS). In SHS, diffraction gratings replace the flat mirrors used in each arm of a conventional Michelson, and an imaging detector is used at the output to record a spatially heterodyned interferogram without any scanning elements. The PIs have achieved an additional light-gathering gain of about 150 over conventional FTS or Fabry-Perot interference spectrometers with their SHS system. These gains translate into smaller instruments and higher sensitivity for a specified application. Their work will focus on atmospheric remote sensing problems. The investigators will fully design a field-widened system suitable for monitoring the global distribution of middle atmospheric OH from space; further, they anticipate performing ground-based testing on a large telescope.

空间外差光谱（SHS）是一种相对较新且尚未开发的光谱方法，与相对的傅里叶变换光谱（FTS）相比具有根本优势。 在 SHS 中，衍射光栅取代了传统迈克尔逊每个臂中使用的平面镜，并且在输出处使用成像探测器来记录空间外差干涉图，而无需任何扫描元件。 与传统 FTS 或法布里-珀罗干涉光谱仪及其 SHS 系统相比，PI 已实现约 150 的额外聚光增益。 这些增益转化为更小的仪器和针对特定应用的更高的灵敏度。 他们的工作将集中于大气遥感问题。 研究人员将全面设计一个适用于从太空监测中层大气·OH全球分布的大视场系统；此外，他们预计在大型望远镜上进行地面测试。