SHACS: Spatial Heterodyne Atmospheric Carbon Dioxide Spectrometer
SHACS: Spatial Heterodyne Atmospheric Carbon Dioxide Spectrometer
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SHACS：空间外差大气二氧化碳光谱仪
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
C. Underwood
中科院分区：
文献类型：
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作者：
Ikpaya O. Ikpaya;C. Underwood
气候变化日益受到关注，减轻其影响的努力的目标是减少化石燃料二氧化碳的排放。卫星观测在理解和管理这一问题方面发挥着关键作用。虽然光学检测二氧化碳相对直接，并且已经用小型卫星实现，但精确的二氧化碳定量测绘需要非常高的精度（300:1）。这通常需要高性能、大型和复杂的仪器，这些仪器的高成本、质量、体积和功率要求使其无法在小型卫星上使用。本文介绍了单通道（1.6 μm）紧凑精密空间外差大气二氧化碳光谱仪（SHACS）的发展阶段，该光谱仪利用空间外差光谱仪（SHS）技术形成坚固、紧凑、无移动部件的傅里叶变换光谱仪（FTS）。该仪器在高信噪比下实现了0.25cm-1的高光谱分辨率，可安装在微型卫星平台上。利用这种性能，可以实现测量精度<4 ppm的大气CO2浓度的高质量测量。
Climate change is of increasing concern and efforts to mitigate its effects are targeted on reducing fossil CO2 emissions. Satellite observations play a key role in the understanding and management of the problem. Whilst detecting CO2 optically is relatively straight-forward, and has been achieved with small satellites, accurate quantitative mapping of CO2 requires very high precision ( 300:1). This normally requires high performance, large and complex instruments whose high cost, mass, volume, and power requirements preclude their use on small satellites. This paper presents the developmental stage of a single channel (1.6 μm) compact precision Spatial Heterodyne Atmospheric Carbon-Dioxide Spectrometer (SHACS), which utilises the Spatial Heterodyne Spectrometer (SHS) technique to form a robust, compact, no-moving-part Fourier Transform Spectrometer (FTS). This instrument achieves a high spectral resolution of 0.25cm-1 at a high SNR of >700:1 and can fit into a micro-satellite platform. With this performance, high quality measurements of atmospheric CO2 concentration with measurement precision of <4 ppm can be achieved.