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Home > Archive>Volume 36, Issue 5, 2017 >620-627. DOI:10.11972/j.issn.1001-9014.2017.05.018
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Model of near-space limb contrast based on non-local thermodynamics equilibrium model
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Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Science and Technology on Optical radiation Laboratory, Beijing Institute of Environmental Feature,Science and Technology on Optical radiation Laboratory, Beijing Institute of Environmental Feature,Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

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    Abstract:

    A physical model was established for studying near-space limb radiance contrast when the target is detected by space-borne infrared surveillance system. The definition of limb contrast and radiation issues of upper atmosphere of the model was described in detail. The target’s limb contrasts were simulated and analyzed to show upper atmospheric radiation properties’ effects to the target visibility based on non-local thermodynamics equilibrium atmospheric model and assumed detector’s noise. The results indicate that the detector’s noise must be considered for evaluating surveillance feasibility correctly. The contrast at the traditional waveband of the strong absorption by water vapor is better than the often-used ‘atmospheric windows’ for the upper atmospheric limb detection. The complicated contrast characteristics result from the relationship among target inherent radiation, atmospheric absorption and background radiation.

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LIU Dong, DAI Cong-Ming, TANG Chao-Li, WU Peng-Fei, LIU Zheng, MAO Hong-Xia, WEI He-Li. Model of near-space limb contrast based on non-local thermodynamics equilibrium model[J]. Journal of Infrared and Millimeter Waves,2017,36(5):620~627

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History
  • Received:February 17,2017
  • Revised:April 13,2017
  • Adopted:May 22,2017
  • Online: November 29,2017
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