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Proceedings Paper

Atmospheric absorption model from 0.01 to 10 wave numbers
Author(s): Michael E. Thomas
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Paper Abstract

The Applied Physics Laboratory has developed a physical optics electromagnetic propagation computer code at radar frequencies that features long path length representation of atmospheric waveguides or ducts. Thus, an accurate tropospheric absorption model, emphasizing water vapor and oxygen effects, is required for a realistic code. The HITRAN database now provides a comprehensive characterization of spectral lines from 0 to 10 cm-1. A theoretical local line shape is used with this database, which improves the traditional models. Also, a new semiempirical water vapor continuum model has been developed based on the theoretical work of Birnbaum and the most recent experimental data. The result is an improved model for low-altitude, long path calculations of atmospheric absorption at radar and millimeter wavelengths.

Paper Details

Date Published: 1 September 1990
PDF: 9 pages
Proc. SPIE 1312, Propagation Engineering: Third in a Series, (1 September 1990); doi: 10.1117/12.21892
Show Author Affiliations
Michael E. Thomas, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 1312:
Propagation Engineering: Third in a Series
Luc R. Bissonnette; Walter B. Miller, Editor(s)

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