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YE Han-han, WANG Xian-hua, LI Zhi-wei, WEI Qiu-ye, SHI Hai-liang, XIONG Wei. Spatial heterodyne spectroscopy for space-based measurements of atmospheric CO2[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2015, 24(4): 540-545. doi: 10.15918/j.jbit1004-0579.201524.0417
Citation: YE Han-han, WANG Xian-hua, LI Zhi-wei, WEI Qiu-ye, SHI Hai-liang, XIONG Wei. Spatial heterodyne spectroscopy for space-based measurements of atmospheric CO2[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2015, 24(4): 540-545.doi:10.15918/j.jbit1004-0579.201524.0417

Spatial heterodyne spectroscopy for space-based measurements of atmospheric CO2

doi:10.15918/j.jbit1004-0579.201524.0417
  • Received Date:2014-03-29
  • To reduce the error from measurement and retrieval process, a new technology of spatial heterodyne spectroscopy is proposed. The principle of this technology and the instrument spatial heterodyne spectrometer (SHS) are introduced. The first application of this technology will be for CO 2measurements from space on a high spectral observation satellite. The outstanding measurement principle and the priority of combination of retrieval algorithm and three channels (O 2A-band, CO 21.58. μ m and 2.06. μ m bands) are theoretically analyzed and numerically simulated. Experiments using SHS prototype with low spectral resolution of 0.4.cm -1are carried out for preliminary validation. The measurements show clear CO 2absorption lines and follow the expected signature with theory spectrum, and the retrievals agreed well with GOSAT CO 2products, except a small bias of about 4×10 -6. The results show that the ability of spatial heterodyne spectroscopy for CO 2detecting is obvious, and SHS is a competent sensor.
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