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Proceedings Paper

Anomalous dispersion in the atmosphere derived from the optical depth
Author(s): Egil Bingen; Bjornar Ystad
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Paper Abstract

The computer code FASCOD2 calculates the atmospheric optical depth with high spectral resolution for different meteorological situations. Since the optical depth and the refractive index are related to respectively the imaginary and real part of the susceptibility, which are interconnected by the Kramers-Kronig relations, it is possible to calculate the atmospheric refractive index by a modified FASCOD2. Due to the computational burden and the lack of well-defined distant wings of the molecular line shape, it is only possible to compute the anomalous dispersion in the neighborhood of the molecular resonance frequencies. This presentation describes briefly a theoretical development of the anomalous dispersion from the optical depth which is valid in a spectral interval ranging from radio waves up to the UV. Line by line calculations of the atmospheric anomalous dispersion at high spectral resolution will be demonstrated for different meteorological situations.

Paper Details

Date Published: 5 January 1993
PDF: 12 pages
Proc. SPIE 1762, Infrared Technology XVIII, (5 January 1993); doi: 10.1117/12.138966
Show Author Affiliations
Egil Bingen, Norwegian Defence Research Establishment (Norway)
Bjornar Ystad, Norwegian Defence Research Establishment (Norway)

Published in SPIE Proceedings Vol. 1762:
Infrared Technology XVIII
Bjorn F. Andresen; Freeman D. Shepherd, Editor(s)

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