熱赤外域における放射伝達方程式の近似表現

概要

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The simplified expression of the radiative transfer equation in the thermal IR spectrum are made for the fundamental formulation of the ε-T separation through the multispectral thermal IR sensor such as ASTER onboard EOS-aml will be launched at 1998. In the simplification, there are there approximations are made for the reduction of the unknown variables. The first approximation is the use of the spectrally integrated Planck function, transmittance and surface emissivity instead of the line-by-line radiative transfer process calculation. The second approximation is the reduction of the atmospheric radiation term into the product of total transmittance and the newly defined value named representative atmospheric radiation. And the third is the simplification of the total transmittance calculation on the basis of the assumption which water vapor is the only one absorber. From the numerical simulation based on the 4050 kinds of surface/atmosphere/observation conditions, the proposed simplified radiative transfer equation is sufficient for the ε-T separation.
長崎大学工学部,Faculty of Engineering, Nagasaki Universityの論文