论述了空间外差光谱技术在大气 CO2超光谱遥感探测中的应用。分析了高精度大气 CO2遥感探测所需的光谱波段、光谱分辨率以及信噪比等重要指标, 以此为设计依据, 开展了大气 CO2空间外差光谱仪核心元器件指标的计算。利用 Y-12飞机进行航空验证实验, 分别采集了农田、工业区、沙滩区域的 CO2吸收光谱数据, 并开展了数据处理, 获取了机载平台下的 CO2精细吸收谱线。初步的反演结果表明空间外差光谱技术能够满足大气 CO2等温室气体的遥感探测灵敏度要求。

The remote sensing application of Spatial Heterodyne Spectroscopy (SHS) in carbon dioxide detection is introduced. Firstly, important indexes for precision carbon dioxide detection are analyzed, such as spectral bands, resolution and SNR. And then, the spatial heterodyne spectrometer’s components indexes are calculated. Aerial experiments over farmland, industrial area, sand beach, are carried out by Y-12 plane and fine absorption spectrum is obtained after data processing. Finally, primary retrieval result shows that SHS meet the greenhouse gas detection sensitivity such as carbon dioxide.