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Proceedings Paper

Karlsruhe optimized and precise radiative transfer algorithm: Part III: ADDLIN and TRANSF algorithms for modeling spectral transmittance and radiance
Author(s): Martin Kuntz; Michael Hoepfner; Gabriele P. Stiller; Thomas von Clarmann; Georg Echle; Bernd Funke; Norbert Glatthor; Frank Hase; Holger Kemnitzer; Sabine Zorn
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Paper Abstract

Two sets of subroutines for calculating absorption cross section spectra and transmission or radiance fields are presented. These libraries will be used in the operational data processing of the MIPAS/ENVISAT level-2 off-line processor and are part of the Karlruhe Optimized and Precise Radiative transfer Algorithm (KOPRA). The objective in developing these libraries was to accommodate flexibility and simplicity in use without substantial loss of accuracy and efficiency. The ADDLIN library uses an efficient method for calculating absorption cross section spectra line-by-line to arbitrary high numerical accuracy. Computational efficiency is achieved by calculating each spectral line on its own optimum set of sampling points. Absorption cross section spectra are stored on flexible, non-equidistant frequency grids. The TRANSF package provides integration routines that can be quickly configured for a variety of specific applications and measurement scenarios. The routines operate on the non-equidistant frequency grids produced by ADDIN and allow the researcher to implement the radiative transfer in a simple and almost natural way. Computational efficiency results from the reduced number of sampling points on the non-equidistant frequency grids produced by ADDIN and allow the researcher to implement the radiative transfer in a simple and almost natural way. Computational efficiency results from the reduced number of sampling points on the non-equidistant frequency grids compared to equidistant frequency grids of uniform intervals.

Paper Details

Date Published: 18 August 1998
PDF: 10 pages
Proc. SPIE 3501, Optical Remote Sensing of the Atmosphere and Clouds, (18 August 1998); doi: 10.1117/12.317752
Show Author Affiliations
Martin Kuntz, Forschungszentrum Karlsruhe GmbH (Germany)
Michael Hoepfner, Forschungszentrum Karlsruhe GmbH (Germany)
Gabriele P. Stiller, Forschungszentrum Karlsruhe GmbH (Germany)
Thomas von Clarmann, Forschungszentrum Karlsruhe GmbH (Germany)
Georg Echle, Forschungszentrum Karlsruhe GmbH (Germany)
Bernd Funke, Forschungszentrum Karlsruhe GmbH (Germany)
Norbert Glatthor, Forschungszentrum Karlsruhe GmbH (Germany)
Frank Hase, Forschungszentrum Karlsruhe GmbH (Germany)
Holger Kemnitzer, Forschungszentrum Karlsruhe GmbH (Germany)
Sabine Zorn, Forschungszentrum Karlsruhe GmbH (Germany)


Published in SPIE Proceedings Vol. 3501:
Optical Remote Sensing of the Atmosphere and Clouds
Jinxue Wang; Beiying Wu; Toshihiro Ogawa; Zheng-hua Guan, Editor(s)

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