23 August 2005 Atmospheric column CO2 and O2 absorption based on Fabry-Perot etalon for remote sensing
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Abstract
We are presenting new experimental data on atmospheric carbon dioxide and oxygen column absorption collected with a passive instrument developed at Goddard Space Flight Center called FPICC (Fabry-Perot Interferometer for Column CO2). The data were recorded on board of NASA's DC-8 flight laboratory during the PAVE experiment (Polar Aura Validation Experiment), January 2005. The precise alignment of the transmission peaks of the Fabry-Perot etalon to the CO2 absorption lines is achieved through altering the refractive index of the material (fused silica) using its temperature dependence. The experimental data presented showed excellent agreement with our theoretical expectations. They are recorded at different gas pressures and temperatures and also at various weather conditions. The goal of the experiment is to demonstrate that variations of the column density of the CO2 can be detected using this passive instrument and the target precision is <0.3%. Some of the major advantages of the optical setup are its compactness, high sensitivity, high signal-to-noise ratio, and stability.
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E. Georgieva, E. Georgieva, E. Wilson, E. Wilson, M. Miodek, M. Miodek, W. S. Heaps, W. S. Heaps, } "Atmospheric column CO2 and O2 absorption based on Fabry-Perot etalon for remote sensing", Proc. SPIE 5882, Earth Observing Systems X, 58820G (23 August 2005); doi: 10.1117/12.612287; https://doi.org/10.1117/12.612287
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