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Proceedings Paper

Atmospheric transmission model development with Fourier-transformed Voigt profile
Author(s): Hirokazu Kobayashi
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Paper Abstract

Author developed a line-by-line atmospheric transmission model based on the Fourier transformed Voigt function. The Voigt function is presented in an integrated form, and direct computation of the function profiles involves a high computational cost because of its numerical characteristics which introduces slow numerical convergency at some area. Many investigations were performed using the polynomial- fitting-to-the-function method to reduce this computation cost. Author introduced a Fourier transformed Voigt function, and developed a line-by-line transmission model for multiple species and lines. In this model, all line-by- line calculations are done in the numerical space which will be Fourier transformed to the wavenumber space a the end of a process. The developed algorithm uses no approximation method for line shape calculation, and has no limitations for the wavenumber resolution and the wavenumber range. Furthermore, the algorithm represents randomly positioned absorption lines by the uniform method and requires no line shapes mapping into the wavenumber space. The model indicates a straight forward implementation procedure of the high-resolution radiation/transmission calculation with huge absorption liens. Author implemented the model on a parallel computing environment and verified that the model calculation performance can be expanded with increasing the number of computing nodes.

Paper Details

Date Published: 8 February 2001
PDF: 5 pages
Proc. SPIE 4151, Hyperspectral Remote Sensing of the Land and Atmosphere, (8 February 2001); doi: 10.1117/12.417019
Show Author Affiliations
Hirokazu Kobayashi, Central Research Institute of Electric Power Industry (Japan)

Published in SPIE Proceedings Vol. 4151:
Hyperspectral Remote Sensing of the Land and Atmosphere
William L. Smith; Yoshifumi Yasuoka, Editor(s)

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