Possibilities of thermal sounding of the atmosphere under non-LTE conditions

Vladimir S. Kostsov; Yuri M. Timofeev; Hartmut Grassl; H. D. Hollweg

doi:10.1117/12.140217

12 February 1993 Possibilities of thermal sounding of the atmosphere under non-LTE conditions

Vladimir S. Kostsov, Yuri M. Timofeev, Hartmut Grassl, H. D. Hollweg

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140217
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Remote sensing methods (space-borne, air-borne, and ground-based) are presently widely used for obtaining information on atmospheric composition and thermal regime. Modern IR remote sensing methods are based on the validity of LTE, which is not true in the upper atmosphere (height of breaking of LTE depends on gas, absorption band and time under consideration). The non-LTE limb radiance has been calculated in the 15-micron CO2 band for tangent heights 50-110 km. The inverse problem has been formulated including the retrieval of vibrational temperature profiles for the lower vibrational states of the CO2 molecule. The method is based on measurements of high-resolution limb radiance spectra. The retrieval accuracy has been investigated depending on measurement error, spectral resolution, and spectral region used.

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Vladimir S. Kostsov, Yuri M. Timofeev, Hartmut Grassl, and H. D. Hollweg "Possibilities of thermal sounding of the atmosphere under non-LTE conditions", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140217

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