Atmospheric absorption model from 0.01 to 10 wave numbers

Michael E. Thomas

doi:10.1117/12.21892

1 September 1990 Atmospheric absorption model from 0.01 to 10 wave numbers

Michael E. Thomas

Proceedings Volume 1312, Propagation Engineering: Third in a Series; (1990) https://doi.org/10.1117/12.21892
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

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.

Citation Download Citation

Michael E. Thomas "Atmospheric absorption model from 0.01 to 10 wave numbers", Proc. SPIE 1312, Propagation Engineering: Third in a Series, (1 September 1990); https://doi.org/10.1117/12.21892

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