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  • 1
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    Inversion technique for IR heterodyne sounding of stratospheric constituents from space platforms (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The techniques which have been employed for inversion of IR heterodyne measurements for remote sounding of stratospheric trace constituents usually rely on either geometric effects based on limb-scan observations (i.e., onion peel techniques) or spectral effects by using weighting functions corresponding to different frequencies of an IR spectral line. An experimental approach and inversion technique are discussed which optimize the retrieval of concentration profiles by combining the geometric and the spectral effects in an IR heterodyne receiver. The results of inversions of some synthetic CIO spectral lines corresponding to solar occultation limb scans of the stratosphere are presented, indicating considerable improvement in the accuracy of the retrieved profiles. The effects of noise on the accuracy of retrievals are discussed for realistic situations.
    Keywords: GEOPHYSICS
    Type: Applied Optics; 20; Nov. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    High Resolution Infrared Spectroscopy Techniques for Upper Atmospheric Measurements (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Infrared heterodyne techniques were considered primarily for detecting molecules predicted to be present but not yet detected in the upper atmosphere.
    Keywords: GEOPHYSICS
    Type: NASA-CP-2134 , L-13780 , Jul 31, 1979 - Aug 02, 1979; Silverthorne, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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